1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
egoroff_w [7]
2 years ago
6

Once a large pink​ ribbon, the sign of the fight against breast​ cancer, was erected out of pink​ post-it notes on a billboard.

If the area of the rectangular billboard covered by the ribbon was approximately 3920 square​ feet, and the width of the billboard was approximately 56 ​feet, what was the height of this​ billboard?
Mathematics
2 answers:
liraira [26]2 years ago
6 0

Answer:

  • 70 ft

Step-by-step explanation:

<u>Area of rectangle:</u>

  • A = wl

<u>Given:</u>

  • A = 3920 ft²
  • w = 56 ft

<u>Find the height:</u>

  • l = A/w
  • l = 3920/56 = 70 ft

saul85 [17]2 years ago
3 0

Answer:

Pretty sure the width would be 70

Step-by-step explanation:

3920ft divided by 56 = 70

You might be interested in
Can someone help me with this problem<br> I don't understand.
Ivahew [28]
E) distributive property

Because you are distributing the 3 to 2/5x and 7/5y
6 0
2 years ago
A laptop producing company also produces laptop batteries, and claims that the batteries
gregori [183]

Answer:

There is enough evidence to support the claim that the batteries power the laptops for significantly less than 4 hours. (P-value = 0).

The null and alternative hypothesis are:

H_0: \mu=4\\\\H_a:\mu< 4

Step-by-step explanation:

<em>The question is incomplete: To test this claim a sample or population standard deviation is needed.</em>

<em>We will estimate that the sample standard deviation is 2 hours, and use a t-test to test that claim.</em>

<em> NOTE (after solving): The difference between the sample mean and the mean of the null hypothesis is big enough to reject the null hypothesis, even when we have a sample standard deviation of 3.5 hours, which can be considered bigger than the maximum standard deviation for the sample.</em>

This is a hypothesis test for the population mean.

The claim is that the batteries power the laptops for significantly less than 4 hours.

Then, the null and alternative hypothesis are:

H_0: \mu=4\\\\H_a:\mu< 4

The significance level is 0.05.

The sample has a size n=500.

The sample mean is M=3.5.

As the standard deviation of the population is not known, we estimate it with the sample standard deviation, that has a value of s=2.

The estimated standard error of the mean is computed using the formula:

s_M=\dfrac{s}{\sqrt{n}}=\dfrac{2}{\sqrt{500}}=0.0894

Then, we can calculate the t-statistic as:

t=\dfrac{M-\mu}{s/\sqrt{n}}=\dfrac{3.5-4}{0.0894}=\dfrac{-0.5}{0.0894}=-5.5902

The degrees of freedom for this sample size are:

df=n-1=500-1=499

This test is a left-tailed test, with 499 degrees of freedom and t=-5.5902, so the P-value for this test is calculated as (using a t-table):

P-value=P(t

As the P-value (0) is smaller than the significance level (0.05), the effect is  significant.

The null hypothesis is rejected.

There is enough evidence to support the claim that the batteries power the laptops for significantly less than 4 hours.

5 0
3 years ago
Its length is
melamori03 [73]

Answer:

$100

Step-by-step explanation:

40x30=1200

1200/12=100

7 0
3 years ago
Which statement best describes how to determine whether f(x) = 9 – 4x2 is an odd function?
Elza [17]

For this case we have the following definitions:


A function is even if, for each x in the domain of f, f (- x) = f (x). The even functions have reflective symmetry through the y-axis.


A function is odd if, for each x in the domain of f, f (- x) = - f (x). The odd functions have rotational symmetry of 180º with respect to the origin.


We then have the following function:

f (x) = 9 - 4x ^ 2


Applying the definitions we have:

f (-x) = 9 - 4 (-x) ^ 2\\f (-x) = 9 - 4 (x) ^ 2\\f (-x) = f (x)


Answer:

The function is not odd because it is fulfilled:

f (-x) = f (x)

Therefore, the function is even.

5 0
2 years ago
Read 2 more answers
The diameter of Virus A is 2.6 • 10^-7 millimeters. If Virus B has a diameter that is 15 times larger than Virus A, find the dia
Naddik [55]
Multiply (2.6 x 10^-7) by 15 to get

3.9 x 10^-6
3 0
3 years ago
Other questions:
  • How much gas does an average car hold?
    13·1 answer
  • Does anyone know what 12/3(4/5)+4/5=
    8·2 answers
  • A rectangle has a length of 3.6 in. and a perimeter of 16.8 in.
    12·1 answer
  • What is 32 divided by 33?
    15·1 answer
  • Problem A. Consider the following initial value problem for a damped driven linear oscillator: m 2 + b** + kx} = f sin(St); x(0)
    15·1 answer
  • Ben is making salsa.He needs 1/3 cups of chilies for each bach of salsa.Ben has 5/6 cup green chilies.How many baches of salsa c
    7·1 answer
  • 3<br> 个<br> 2x<br> 38<br> V-2<br> 24<br> 丰<br> 36<br> Z+88<br> X=
    15·1 answer
  • Lola bought a new sweater that was on sale for 20% off. The original price was $86.
    14·2 answers
  • HELP MEeeeeeeeee g: R² → R a differentiable function at (0, 0), with g (x, y) = 0 only at the point (x, y) = (0, 0). Consider<im
    7·1 answer
  • Find the quotient of 15.75 and 4.5?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!