Pedro deposited $35 then withdrew $50 show number line graph
A hot air balloon rising vertically is tracked by an observer located 3 miles from the lift-off point. At a certain moment, the angle between the observer's line-of-sight and the horizontal is π/3 , and it is changing at a rate of 0.1 rad/min. How fast is the balloon rising at this moment?
The observer and the balloon form a right triangle (see attachment).
The balloon is rising at 1.2 rad per min
Using tangent rule, we have:
[tex]\mathbf{tan(\theta) = \frac{y}{x}}[/tex]
Substitute 3 for x
[tex]\mathbf{tan(\theta) = \frac{y}{3}}[/tex]
Differentiate both sides with respect to time (t)
[tex]\mathbf{sec^2(\theta) \cdot \frac{d\theta}{dt} = \frac{1}{3} \cdot \frac{dy}{dt}}[/tex]
Make dy/dt, the subject
[tex]\mathbf{\frac{dy}{dt} = 3 \cdot sec^2(\theta) \cdot \frac{d\theta}{dt} }[/tex]
Substitute [tex]\mathbf{\theta = \frac{\pi}{3}\ and\ \frac{d\theta}{dt} = 0.1}[/tex]
So, we have:
[tex]\mathbf{\frac{dy}{dt} = 3 \cdot sec^2(\pi/3) \cdot 0.1 }[/tex]
Using a calculator, we have:
[tex]\mathbf{\frac{dy}{dt} = 3 \cdot 2^2 \cdot 0.1 }[/tex]
Multiply
[tex]\mathbf{\frac{dy}{dt} = 1.2}[/tex]
Hence, the balloon is rising at 1.2 rad per min
Read more about rates at:
https://brainly.com/question/14007695
What is the reciprocal of 6 4/5?
A.) 5/34
B.) 29/5
C.) 34/5
D.) 15/5
Answer:
A
Step-by-step explanation:
The denominator in the original question is 5.
Therefore the answer must have 5 in the numerator. The answer can only be A.
6 4/5 = (30 + 4) / 5 = 34/5 This is the original fraction. The upside down of the original fraction is the reciprocal. Upside down of 34/5 is 5/34. You can come to this conclusion by doing this.
The formal definition of a reciprocal is 1/a where a is a fraction.
In this case a = 34/5. The reciprocal is 1/a = 1 // 34/5. You don't change anything by making it 1/1 // 34/5
1/1 // (34/5) Invert and multiply the bottom.
1/1 * 5/34 = 5/34
Write an equation of four lines that intersect to form the sides of a parallelogram
To write equations for four lines forming a parallelogram, we use the slope-intercept form ensuring two sets of parallel lines. Opposite lines have equal slopes and by manipulating the y-intercepts, we ensure they intersect appropriately to form a parallelogram.
Writing an equation for four lines that intersect to form the sides of a parallelogram involves ensuring that opposite sides are parallel and equal in length. One straightforward approach is to use the slope-intercept form of a line, y = mx + b, to define the lines.
Let's start by defining two lines with slopes 'm' and 'm' (since opposite sides of a parallelogram are parallel) and two lines with slopes '-1/m' to ensure they are also parallel to each other but perpendicular to the first set of lines. If we assume lines have y-intercepts at 'b' and '-b' respectively (to ensure symmetry and simplify calculations), our equations would be:
y = mx + b (Line 1)y = mx - b (Line 2) - Parallel to Line 1y = (-1/m)x + k (Line 3) - Perpendicular to Line 1y = (-1/m)x + l (Line 4) - Parallel to Line 3Here, m represents the slope of the first set of parallel lines, b represents the y-intercept of line 1, -b represents the y-intercept of line 2, and k and l are the y-intercepts of lines 3 and 4. By adjusting 'b', 'k', and 'l' we ensure the lines intersect to form a parallelogram.
These lines will form a parallelogram as long as 'k' and 'l' are chosen such that the distances between the y-intercepts of lines 1 and 2, and lines 3 and 4, are equal, satisfying the condition for parallel lines in a parallelogram. This way, we can visually imagine or draw a parallelogram with these four lines as its sides.
Bottles of water sell for $1.50 each. Graph the relationship between the number of bottles of water sold and the total cost.
draw a graph with number of bottles on the x axis ( and number it 1 through 10 )
put price on the y axis and label it in increments of $1.50 ( 1.50, 3.00 , 4.50, 6.00, etc.
Then put dots on the intersection of price with the number of bottles and then draw a straight line through the dots.
for every 1 bottle of water sold the price increases by 1.50
so at x 1 y = 1.50
at x 2 y = 3.00
at x 3 y = 4.50
and so on
there are 207 students in 9 classes at east middle school at this rate how many students are in six classes
A rectangle is drawn so that the width is 2 feet shorter than the length. The area of the rectangle is 80 square feet. Find the length of the rectangle.
Final answer:
To find the length of the rectangle, set up a proportion using the given information. Solve the equation to find the length of the rectangle is 10 feet.
Explanation:
To find the length of the rectangle, we can set up a proportion using the given information. Let the length of the rectangle be L and the width be W. From the problem, we know that the width is 2 feet shorter than the length, so we can write the equation W = L - 2. We also know that the area of the rectangle is 80 square feet, so we can write the equation L * W = 80.
Substituting W = L - 2 into the equation L * W = 80, we get L * (L - 2) = 80. Expanding and rearranging the equation gives us L2 - 2L - 80 = 0. Factoring the quadratic equation, we find (L - 10)(L + 8) = 0.
Since we are looking for the length of the rectangle, we discard the negative solution and find that L = 10. Therefore, the length of the rectangle is 10 feet.
Miki has a sheet of paper with a length of 104 centimeters and a width of 88 centimeters. She wants to divide it into the largest squares possible without wasting any paper. How many squares of the largest size will she be able to cut from the paper? 13 squares, 26 squares, 143 squares, or 572 squares
350 kilometers in 5 hours in unit rate
Answer:
70 kilometers per hour.
Step-by-step explanation:
Remember that unit rate is the direct correlation between two different units, but the numerator should be 1, this means that for example if you can cook 20 muffins in 4 ovens, you have to calculate how many muffins can you cook in one oven, to calculate this problem you have to divide the kilometers by the hours you have:
350 kilometers/ 5 hours= 70 km/hr.
So that would be the answer.
Bank of america customers select their own three-digit personal identification number (pin) for use at atms.(b) if zero can be the first digit and the numbers can be repeated, what is the probability mr. jones and mrs. smith select the same pin?
The Graduate Management Admission Test (GMAT) is a standardized exam used by many universities as part of the assessment for admission to graduate study in business. The average GMAT score is 547 (Magoosh website, January 5, 2015). Assume that GMAT scores are bell-shaped with a standard deviation of 100.
. What percentage of GMAT scores are 647 or higher?
15.8
b. What percentage of GMAT scores are 747 or higher (to 1 decimal)?
2.9
c. What percentage of GMAT scores are between 447 and 547 ?
25
d. What percentage of GMAT scores are between 347 and 647 (to 1 decimal)?
Answer:
16%; 2.5%; 34%; 81.5%
Step-by-step explanation:
Using the empirical rule, we know that 68% of data falls within one standard deviation of the mean; 95% of data falls within two standard deviations of the mean; and 99.7% of data falls within 3 standard deviations of the mean.
This means from the mean to 1 standard deviation (σ) above is 34% of data; from the mean to 1 σ below is 34% of data; from 1 σ to 2σ above is 13.5% of data; from 1σ to 2σ below is 13.5% of data; from 2σ to 3σ above is 2.35% of data; from 2σ to 3σ below is 2.35% of data; more than 3σ above is 0.15% of data; and more than 3σ below is 0.15% of data.
647 is 1 σ above the mean. This means that we go from here above;
13.5+2.35+0.15 = 16%
747 is 2σ above the mean. This means that we go from here above:
2.35+0.15 = 2.5%
447 is 1σ below the mean and 547 is the mean. This means that we have 34%.
347 is 2σ below the mean and 647 is 1 above the mean. This means we go from:
13.5+34+34 = 81.5%
To find the percentage of GMAT scores between 347 and 647, find the z-scores and use a z-table to calculate the cumulative area.
Explanation:To find the percentage of GMAT scores between 347 and 647, we need to find the area under the bell curve between these two scores. First, we need to find the z-scores for both scores using the formula z = (x - μ) / σ. For 347, the z-score is (-200) / 100 = -2, and for 647, the z-score is 100 / 100 = 1.
Next, we need to find the percentage of data between these z-scores. We can use a z-table to find the cumulative area. The cumulative area for -2 is 0.0228 and for 1 is 0.8413.
To find the percentage between these two z-scores, we subtract the cumulative area for -2 from the cumulative area for 1: 0.8413 - 0.0228 = 0.8185.
Therefore, the percentage of GMAT scores between 347 and 647 is 81.85%.
Learn more about GMAT scores here:https://brainly.com/question/30430021
#SPJ3
Two of the sides of an isosceles triangle have lengths of 10 cm and 4 cm. what is the length of the base?
An isosceles triangle is a triangle that has any two sides equal in length and angles opposite to equal sides are equal in measure.
The unequal side is the base of the triangle.
The length of the base of the isosceles triangle is
10 cm or 4 cm.
What is an isosceles triangle?An isosceles triangle is a triangle that has any two sides equal in length and angles opposite to equal sides are equal in measure.
The unequal side is the base of the triangle.
We have,
Two sides of an isosceles triangle have lengths:
= 10 cm and 4 cm
The unequal side of the isosceles triangle is the base and the other two sides have to be equal.
We can have two cases-
Case 1.
If the equal two sides are 10 cm.
Base = 4 cm
Case 2.
If the equal two sides are 4 cm.
Base = 10 cm.
Thus the length of the base of the isosceles triangle is
10 cm or 4 cm.
Learn more about the isosceles triangle here:
https://brainly.com/question/22532714
#SPJ2
In Ms. Hendricks class, there are 10 boys and 12 girls. What is the ratio of boys to girls? Express your answer as a fraction in simplest form.
The local police department must write, on average, 5 tickets a day to keep department revenues at budgeted levels. suppose the number of tickets written per day follows a poisson distribution with a mean of 6.5 tickets per day. interpret the value of the mean.question 3 options:
Qual é a diferença entre a população de Toledo e Umuarama?
Toledo - 119 207
Umuarama - 100 716
Jean-Marc used a scale factor of 5 to make this scale drawing of a moth.
In the drawing, the wingspan of the moth measures 3 centimeters. What was the actual wingspan, in millimeters, of the moth Jean-Marc observed?
How to find the general solution to y"'+2y"-4y'-8y=0?
f(x)=x g(x)=1 what is the domain of (g/f)(x)
[tex]\left(\dfrac{g}{f}\right)(x)=\dfrac{g(x)}{f(x)}\\\\\text{We have}\ f(x)=x\ \text{and}\ g(x)=1.\ \text{Substitute}\\\\\left(\dfrac{g}{f}\right)(x)=\dfrac{1}{x}\\\\\text{The domain}:\ x\neq0\\\\Answer:\ \boxed{\text{All real numbers except 0}\to x\in\mathbb{R}-\{0\}}[/tex]
The domain of the function is a real number except 0 because the function is not defined at x = 0.
What are domain and range?The domain means all the possible values of x and the range means all the possible values of y.
The functions are given below.
f(x) = x
g(x) = 1
Then the domain of the function (g/f)(x) will be
(g/f)(x) = 1 / x
Then the graph of the function is given below.
The domain of the function is a real number except 0 because the function is not defined at x = 0.
More about the domain and range link is given below.
https://brainly.com/question/12208715
#SPJ2
logan made a treasure hunt map.the treasure is 25cm away from his location.if each 1cm on the scale drawing equals 5 meters, then how far he is from treasure?
Logan's treasure is represented as 25 cm away on his map; using the scale of 1 cm to 5 meters, it can be calculated that he is 125 meters away from the treasure by multiplying the map distance by the scale factor.
Logan has created a treasure hunt map where the scale indicates that 1 cm on the map corresponds to an actual distance of 5 meters. To determine the actual distance Logan is from the treasure, we first note that the treasure is shown as 25 cm away from his location on the map. Since the scale factor is 1 cm to 5 meters, we can set up a simple multiplication to find the actual distance.
The calculation would be as follows:
Scale factor: 1 cm = 5 meters
Map distance: 25 cm
Actual distance: 25 cm x 5 meters/cm
By multiplying the map distance by the scale factor, we get:
Actual distance = 25 x 5 = 125 meters
Therefore, Logan is 125 meters away from the treasure.
Solve x2 – 8x = 20 by completing the square. Which is the solution set of the equation? {–22, 14} {–14, 22} {–10, 2} {–2, 10}
Answer: D is the right answer. The solution set of the given equation={-2,10}.
Explanation:
Given equation: [tex]x^2-8x=20[/tex]
The standard perfect square trinomial equation is [tex]x^2+2ax+a^2=(x+a)^2[/tex]
On comparing this with the left side of the given equation ,we get 2a=-8
⇒a= -4 and [tex]a^2=16[/tex]
Now to make given equation perfect square add 16 on the both sides, we get [tex]x^2-8x+16=20+16\\\Rightarrow(x-4)^2=36[/tex]
Taking square root on both the sides we get,
[tex]x-4=-6\ or\ x-4=6[/tex]
add 4 on both sides, we get
⇒x= -6+4 or x=6+4
⇒x=-2 or x=10
Therefore, the solution set of the given equation={-2,10}.
Thus D is the right answer.
A) what value represents the 40th percentile of these returns?
What is the effective rate on a $10,000 treasury bill 4% for 13 weeks?
Final answer:
The effective rate on a $10,000 treasury bill with a nominal rate of 4% for 13 weeks is 4.06%.
Explanation:
The effective rate on a treasury bill is the annualized interest rate that takes into account the compounding of interest over the term of the bill. To calculate the effective rate, you can use the formula:
[tex]Effective Rate = (1 + (Nominal Rate / M))^M - 1[/tex]
Where:
Effective Rate is the annualized interest rateNominal Rate is the stated interest rate (4% in this case)M is the number of compounding periods in one year (for a treasury bill, usually 4 as it is a 13-week bill)Plugging in the values:
Effective Rate = [tex](1 + (0.04 / 4))^4[/tex]- 1
= [tex](1 + 0.01)^4 - 1[/tex]
= [tex]1.01^4 - 1[/tex]
= 1.04060401 - 1
= 0.04060401 (or 4.06% rounded to two decimal places)
Therefore, the effective rate on a $10,000 treasury bill with a nominal rate of 4% for 13 weeks is 4.06%.
Cereal costs $2.79 for 16.4 ounces. At this rate how much does 25 ounces of cereal cost?
NEED HELP !!!!!
put a check mark for the correct term (rational irrational )
61 pie
42
75.671523
101
6/5
James built a small electric car and recorded the distance it traveled. The table below shows the distance traveled (n) during the first 4 seconds after starting (f). Elapsed Time (seconds) Distance Traveled (feet) 1 6.2 2 12.4 3 18.6 4 24.8 Which of the following equations represents the relationship between the distance traveled and the elapsed time? f = 6.2 + n n = 6.2 + f f = 6.2n n = 6.2f
Find the area of a circle with the diameter of 3 centimeters use. 3.14 for pi
Which fraction shows 2.8 as the quotient of two integers?
14/5
12/5
9/4
9/2
Answer:14/5 is the correct answer, just took test
Step-by-step explanation:
600,000 to the nearest hundred thousand is
Solve: 3x - 2x + 4 = 5x - 4x - 8
jerome burned 75 calories in 15 minutes on a stationary bicycle. how many calories will he burn in 25 minutes?