Simplify the expression 111,000 × 0.072 using scientific notation and express your answer in scientific notation.
Final answer:
The simplified expression is 7.992 × 10³.
Explanation:
To simplify the expression 111,000 × 0.072 using scientific notation, follow these steps:
Express 111,000 in scientific notation: 1.11 × 10⁵Express 0.072 in scientific notation: 7.2 × 10⁻²Multiply the two numbers: (1.11 × 10⁵) × (7.2 × 10⁻²)First, multiply the decimal parts: 1.11 × 7.2 = 7.992Next, add the exponents for the powers of 10: 5 + (-2) = 3Combine the results: 7.992 × 10³Finally, if necessary, adjust the number to have only one non-zero digit to the left of the decimal point: 7.992 × 10³ is already in correct form.The expression simplified in scientific notation is 7.992 × 10³.
Please Help. Please Explain your Answer
The average speed in miles per hour for the entire trip of Emily is 38 miles per hour.
The correct answer is Option D.
Given data:
To find Emily's average speed during her entire trip, calculate the total time she spent traveling on both the highway and local roads.
To determine the speed on the highway.
On the highway, she traveled 30 miles faster than on the local roads, and her speed on the local roads is 20 miles per hour.
Speed on the highway = Speed on the local roads + 30 miles per hour
Speed on the highway = 20 miles per hour + 30 miles per hour
Speed on the highway = 50 miles per hour
Now, calculate the time spent on each segment of the trip:
Time spent on the highway = Distance on the highway / Speed on the highway
Time spent on the highway = 60 miles / 50 miles per hour
Time spent on the highway = 1.2 hours
Time spent on local roads = Distance on local roads / Speed on local roads
Time spent on local roads = 16 miles / 20 miles per hour
Time spent on local roads = 0.8 hours
Now, add the times for both segments to get the total time:
Total time = Time spent on the highway + Time spent on local roads
Total time = 1.2 hours + 0.8 hours
Total time = 2 hours
So, the average speed is determined as:
Average speed = Total distance / Total time
Average speed = (60 miles + 16 miles) / 2 hours
Average speed = 76 miles / 2 hours
Average speed = 38 miles per hour
Hence, Emily's average speed during her entire trip was 38 miles per hour.
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he coordinates of the vertices of a polygon are (−2,−2), (3,−3), (4,−6), (1,−6), and (−2,−4).
What is the perimeter of the polygon to the nearest tenth of a unit?
Answer:
16.9
Step-by-step explanation:
The distance formula can be used to find the lengths of individual segments. It tells you ...
d = √((Δx)² +(Δy)²)
where Δx and Δy are the differences between x- and y-coordinates of the segment end points.
Since the value is squared, the sign of the difference doesn't matter. It can be easier to write it as always positive, so in some cases it may be Δx = x₂-x₁ and in other cases it might be Δx = x₁-x₂, for example.
If the segments are labeled A, B, C, D, E in order, the distances are ...
AB = √(5²+1²) = √26 ≈ 5.099
BC = √(1²+3²) = √10 ≈ 3.162
CD = Δx = 3
DE = √(3²+2²) = √13 ≈ 3.606
EA = Δy = 2
Then the perimeter is ...
P = AB +BC +CD +DE +EA = 5.099 +3.162 +3 +3.606 +2 = 16.867
P ≈ 16.9
what is 2 1/2x−3/4(2x+5)=3/8
Solve 5c + 4 = −26.
6
−6
−4.4
3
Answer:
-6 :))))))))))))))))))
Step-by-step explanation:
Sonia has three bracelets. she wears them all at the same time but if a different order each day. how many different combinations does sonia have to choose from
The distance on a map is 4 1/8 inches. find the actual distance if the scale on the map is 20 inches= 40 miles.
Write the ratio
three sevenths
3
7
to
6 as a fraction in simplest form.
A bag contains 8 blue marbles, 5 green marbles and 7 red marbles. If Alicia removes two marbles without replacing them, what is the probability that he will choose red, then green?
To find the probability of choosing a red marble, then a green marble without replacement, multiply the probabilities of the individual events which is 7/76.
Explanation:To find the probability that Alicia will choose red, then green marbles, we need to calculate the probability of drawing a red marble and then a green marble without replacement.
Given that there are 8 blue marbles, 5 green marbles, and 7 red marbles in the bag, the probability of drawing a red marble first is 7/20.
After removing the red marble, there are 19 marbles left in the bag, including 5 green marbles. Therefore, the probability of drawing a green marble second is 5/19.
To find the combined probability, we multiply the probabilities of the individual events:
P(Red, then Green) = P(Red) * P(Green | Red) = (7/20) * (5/19) = 35/380 = 7/76.
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Two angles that are complementary __________ form a right angle. 2. angles with a common side and a common vertex ______ form a linear pair. 3. two angles that are supplementary are _______ complementary.
Nine less than a number is no more than 8 and is no less than 3
what is the value of x
(40x+15)
135
By setting up the proportion [tex]\(\frac{15}{x} = \frac{x}{135}\)[/tex] and solving for [tex]\( x \)[/tex], we find that [tex]\( x = 45 \).[/tex]
To find the value of [tex]\( x \)[/tex] when the terms 15, [tex]\( x \)[/tex], and 135 are in proportion, we set up the proportion:
[tex]\[\frac{15}{x} = \frac{x}{135}\][/tex]
This represents the relationship where the first ratio is equal to the second ratio. Cross-multiplying, we get:
[tex]\[15 \times 135 = x \times x\][/tex]
[tex]\[2025 = x^2\][/tex]
Taking the square root of both sides, we find:
[tex]\[x = \sqrt{2025}\][/tex]
[tex]\[x = \pm 45\][/tex]
However, since 15, x , and 135 are in proportion, the value of x must be positive. Therefore, x = 45 .
The question probable maybe:
If the three terms 15, x and135 are in proportion then what is the value of x
Given a = {1, 2, 3, 4, 5, 6, 7, 8, 9} and b = {2, 4, 6, 8} what is AUB?
exTrA cREdiT BOnuS pOiNTS
On an algebra test , the highest grade was 42 points higher than the lowest grade . The sum of the two grades was 138 . Find the lowest grade .
The lowest grade is 48.
What is substitution method?The substitution method is the algebraic method to solve simultaneous linear equations. In this method, the value of one variable from one equation is substituted in the other equation.
Let the lowest grade be x and highest grade be y.
According to the given question.
[tex]y = 42 + x[/tex]
Also,
[tex]x + y= 138[/tex]
For finding the points of lowest grade and highest grade substitute
y = 42 + x in x + y = 38.
[tex]x + ( 42 + x ) = 138[/tex]
⇒ [tex]2x + 42 = 138[/tex]
⇒ [tex]x + 21 = 69[/tex]
⇒[tex]x = 69 -21[/tex]
⇒[tex]x = 48[/tex]
Therefore,
[tex]y = 48 + 42 =90[/tex]
Hence, the lowest grade is 48.
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Deon caught a 4 3/4 pound fish how much it weigh in ounces
Can you guys help me please ?(:
Factoring quadratic trinomials in the form (ax 2 + bx +
c. where a = ≠ 1
Harry and his friends share some watermelon equally. Each person gets of a watermelon. Which of the following shows a possible way that the watermelon is served?
2 watermelons divided among 7 people.
7 watermelons divided among 2 people.
of a watermelon divided among 2 people.
of a watermelon divided among 7 people.
Bryan used the six steps to solve this problem. On one of the steps, he decided that he would use multiplication and addition to compare the companies and find the best rate. Which step did Bryan use to help him decide?
A pipe is 10 ft long. It need to be cut into pieces that are each 2/5 feet long. How many pieces can be made from the pipe?
Given the functions f(x) = 2x2 - 8x, g(x) = x2 - 6x + 1, and h(x) = -2x2, rank them from least to greatest based on their axis of symmetry. (2 points)
g(x), f(x), h(x)
f(x), g(x), h(x)
h(x), f(x), g(x)
h(x), g(x), f(x)
Answer:
h(x), f(x) , g(x)
Step-by-step explanation:
[tex]f(x) = 2x^2 - 8x[/tex]
Axis of symmetry at [tex]x=\frac{-b}{2a}[/tex], a=2, b=-8
[tex]x=\frac{-b}{2a}[/tex]
[tex]x=\frac{-(-8)}{2(2)}=2[/tex]
[tex]g(x) = x^2 - 6x + 1[/tex], a= 1, b=-6
[tex]x=\frac{-b}{2a}[/tex]
[tex]x=\frac{-(-6)}{2(1)}=3[/tex]
[tex]h(x) = -2x^2[/tex], a=-2, b=0
[tex]x=\frac{-b}{2a}[/tex]
[tex]x=\frac{-(0)}{2(-2)}=0[/tex]
Now rank the function based on their axis of symmetry
h(x), f(x) , g(x)
Use synthetic division to evaluate the function at the indicated values
h(x)=x^6-4x^4+5x^2+1
h(2)
h(-1)
please show your work
Final answer:
[tex]\[ h(2) = 55, \quad h(-1) = 3 \][/tex]
Explanation:
To evaluate [tex]\(h(x)\)[/tex] at the given values using synthetic division, we start with the coefficients of the polynomial [tex]\(x^6 - 4x^4 + 5x^2 + 1\).[/tex]
1. For [tex]\(h(2)\):[/tex]
- Write down the coefficients: 1, 0, -4, 0, 5, 0, 1.
- Using synthetic division with 2 as the divisor, perform the operations to obtain the result 55.
2. For [tex]\(h(-1)\):[/tex]
- Repeat the process with -1 as the divisor, using the coefficients: 1, 0, -4, 0, 5, 0, 1.
- After the calculations, the result is 3.
In both cases, the final values represent the result of evaluating the function [tex]\(h(x)\)[/tex] at x = 2 and [tex]\(x = -1\)[/tex] respectively.
How to solve equations with 2 variables step by step?
Two step algebraic equations are relatively quick and easy -- after all, they should only take two steps. To solve a two step algebraic equation, all you have to do is isolate the variable by using either addition, subtraction, multiplication, or division. If you want to know how to solve two step algebraic equations in a variety of ways, just follow these steps.
1. Write the problem. The first step to solving a two step algebraic equation is just to write the problem so you can start to visualize the solution. Let's say we're working with the following problem: -4x + 7 = 15.
2. Decide whether to use addition or subtraction to isolate the variable term. The next step is to find a way to keep "-4x" on one side and to keep the constants (whole numbers) on the other side. To do this, you'll have to do the "Additive Inverse," finding the opposite of +7, which is -7. Subtract 7 from both sides of the equation so that the "+7" on the same side as the variable term is canceled out. Just write "-7" below the 7 on one side and below the 15 on the other so the equation remains balanced. Remember the Golden Rule of Algebra. Whatever you do to one side of an equation must be done to the other side to maintain the balance. That is why 7 is subtracted from the 15 as well. We only need to subtract 7 once per side, which is why the 7 is not subtracted from the -4x as well.
3. Add or subtract the constant on both sides of the equation. This will complete the process of isolating the variable term. Subtracting 7 from +7 on the left side of the equation will leave no constant term (or 0) on the left side of the equation. Subtracting 7 from +15, on the right side of the equation, will leave you with 8. Therefore, the new equation is -4x = 8. -4x + 7 = 15 =-4x = 84. Eliminate the coefficient of the variable through division or multiplication. The coefficient is the number attached to the variable. In this example, the coefficient is -4. To remove the -4 in -4x, you'll have to divide both sides of the equation by -4. Right now, the x is being multiplied by the -4, so the opposite of this operation is division and you'll have to do it on both sides. Again, whatever you do to the equation must be done to both sides. That is why you see ÷ -4 twice.5.Solve for the variable. To do this, divide the left side of the equation, -4x, by -4, to get x. Divide the right side of the equation, 8, by -4, to get -2. Therefore, x = -2. You've taken two steps -- subtraction and division -- to solve this equation.To solve two-variable equations, identify unknowns, find related equations, substitute known values, and solve for one variable before finding the other. Use substitution or elimination methods in case of a system of equations.
To solve equations with 2 variables, follow these steps:
Identify the unknowns: Determine what you need to find.Find a set of equations that relate the unknowns.Substitute known values into the equations, ensuring unit consistency.Combine equations and isolate one variable to solve for it.Use the solved variable to find the other unknown in one of the original equations.If necessary, make and note assumptions that simplify the equations—but be aware of their implications.Regarding a 2x2 system (two equations with two unknowns), you can either use substitution—solving one equation for one variable and then substituting into the other—or elimination—adding or subtracting equations to cancel one of the variables. If an equation has more than one unknown, additional equations are necessary to solve the system.
For instance, consider a pair of equations:
1) x + y = 10
2) x - y = 6
By adding these two equations, y is eliminated, and we can solve for x quickly. Then, we can substitute the value of x into either equation to solve for y.
Solve.
−1/2x ≥ −8 then Graph the solution
9. Darcy is buying apples and oranges for a large fruit basket to give away as a door prize at a charity event. Apples cost $0.24 each and oranges cost $0.80 each. She has $12 to spend and would like to purchase at least 20 pieces of fruit total.
a) Write a system of linear inequalities to represent
this situation, then graph.
b) Using your graph, give two possible combinations
of apples and oranges Darcy can buy.
Write an equation of a parabola with vertex at the origin and the given focus (1, 0)
Given the midpoint and one of the endpoints,find the other endpoint of the segment
Braic equation. two airplanes leave chicago at the same time and fly in opposite directions. if one travels at 490 miles per hour and the other at 470 miles per hour, how long will it take for them to be 4,800 miles apart
identify the like terms 12c,d,c,-2c,4d
help me plz it will be on the exam! Pedro and Bobby each own an ant farm. Pedro starts with 100 ants and says his farm is growing exponentially at a rate of 15% per month. Bobby starts with 350 ants and says his farm is steadily decreasing by 5 ants per month.
Assuming both boys are accurate in describing the population of their ant farms, after how many months will they both have approximately the same number of ants?
Final answer:
To find the month when Pedro's exponentially growing ant farm and Bobby's linearly decreasing ant farm have the same number of ants, we set the exponential growth formula equal to the linear decrease formula and solve for the number of months, using graphical or numerical methods.
Explanation:
We need to determine after how many months Pedro's exponentially growing ant farm will have the same number of ants as Bobby's linearly decreasing ant farm.
Let's denote the number of months as m. Pedro's ant farm starts with 100 ants and grows at a rate of 15% per month, so the population at month m is PPedro = 100 × (1 + 0.15)m.
Bobby's ant farm starts with 350 ants and decreases by 5 ants per month, so the population at month m is PBobby = 350 - 5m.
We need to find the month m where PPedro is approximately equal to PBobby. This can be solved by equating and solving the two expressions:
100 × (1 + 0.15)m ≈ 350 - 5m
To solve this, we can use either graphical methods or numerical methods such as iterative approximation, since an exact solution may not be possible through algebraic methods. We are looking for the value of m that makes both sides approximately equal.