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
Mamont248 [21]
3 years ago
13

2. A boy who is 5 feet 6 inches tall casts a shadow that is 8 feet and 3 inches long. What is the measure of the

Mathematics
1 answer:
kvasek [131]3 years ago
6 0

Answer:

34°

Step-by-step explanation:

The boy is 5 feet 6 inches tall.

The boy casts a shadow that is 8 feet and 3 inches long.

We know 12 inches equal 1 foot.

Therefore the boy's height is 5.5ft and the shadow is 8.25ft.

The angle of elevation of the sun is given by the tangent of the angle A.

\tan(A)  =  \frac{5.5}{8.25}

\tan(A)  =  0.6667

A=   {\tan}^{ - 1} (0.6667)

A=33.69 \degree

To nearest degree is 34°

You might be interested in
A toy store is ordering 3,000 remote control cars. The store can order the cars in sets of 10. How many sets of 10 does the stor
kirza4 [7]
If the store can only buy them in bulks of ten, then you take your number of desired cars (3,000) and divide it by the bulk amount (10) and it will give you your amount of bulk you need to buy to fulfill your desired amount of product (300). Simplified, you take your cars that they want, divide it by how many come in a set, and the answer will be how many sets they need to order. You need to use both the amount of desired cars and number of cars in a set as you primary information to solve this problem. Hope this helped!
3 0
3 years ago
Solve the following system of equations using the substitution method.
Novay_Z [31]
X=2y
2x+5y=9

substitute the x=2y into the second equation
2(2y)+5y=9
multiple the 2y by 2. 4y+5y=9
combine like terms. 9y=9
divide the 9 out from both sides. y=1
plug the y back into the first equation
x=2(1)
multiply. x=2

your answer is: x=2
y=1
7 0
3 years ago
A manufacturer of nails claims that only 4% of its nails are defective. A random sample of 20 nails is selected, and it is found
irakobra [83]

Answer:

The p-value of the test is 0.0853 > 0.05, which means that there is not enough evidence to reject the manufacturer's claim based on this observation.

Step-by-step explanation:

A manufacturer of nails claims that only 4% of its nails are defective.

At the null hypothesis, we test if the proportion is of 4%, that is:

H_0: p = 0.04

At the alternative hypothesis, we test if the proportion is more than 4%, that is:

H_a: p > 0.04

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

4% is tested at the null hypothesis

This means that \mu = 0.04, \sigma = \sqrt{0.04*0.96}

A random sample of 20 nails is selected, and it is found that two of them, 10%, are defective.

This means that n = 20, X = 0.1

Value of the test statistic:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.1 - 0.04}{\frac{\sqrt{0.04*0.96}}{\sqrt{20}}}

z = 1.37

P-value of the test and decision:

Considering an standard significance level of 0.05.

The p-value of the test is the probability of finding a sample proportion above 0.1, which is 1 subtracted by the p-value of z = 1.37.

Looking at the z-table, z = 1.37 has a p-value of 0.9147

1 - 0.9147 = 0.0853

The p-value of the test is 0.0853 > 0.05, which means that there is not enough evidence to reject the manufacturer's claim based on this observation.

7 0
3 years ago
Read 2 more answers
Which of the following rules describes the function graphed below?
n200080 [17]

Answer:

D

Step-by-step explanation:

Output = 3*input - 2. Observe the graph again

4 0
2 years ago
PLZ HELP PLEASE ./////
Harrizon [31]

Answer:

Step-by-step explanation:

The A

3 0
3 years ago
Other questions:
  • Is y=9x-8 a function
    10·2 answers
  • This isn't an important question, so if you have other questions to answer move on.
    6·1 answer
  • Write the ratio in three different formats:a to b, a:b, and a/b.
    15·1 answer
  • Which of th following does not belong in the integer circle?<br> A.-2.5<br> B.-3<br> C.0<br> D.√16
    10·1 answer
  • Can you please answer it’s question today
    8·1 answer
  • 3. HELPPP asaaaaaapppppp
    7·1 answer
  • The formula for volume of a sphere is V=4/3 nR3, but what does the 4/3 mean and what am supposed to do with it?
    15·1 answer
  • Need help with math
    5·1 answer
  • A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was 1491 and the standard deviati
    8·1 answer
  • Find the value of x 2x = 98² - 2²​
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!