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marin [14]
3 years ago
15

Find the length of the missing side.

Mathematics
1 answer:
jenyasd209 [6]3 years ago
3 0

Answer:

68 ft

Step-by-step explanation:

to find the length of the missing side we can use the Pythagorean Theorem which is a² + b² = c², where <em>a</em> and <em>b</em> are sides (legs) of the triangle and <em>c</em> is the hypotenuse. the hypotenuse of a right triangle is the side opposite of the right angle. using this information we can see the following:

sides of the triangle (a and b): 32 and 60

hypotenuse: c, our missing side

we plug these values into the formula

32² + 60² = c² < simplify the exponents

1024 + 3600 = c² < add

4624 = c² < square root both sides to get c on one side with no exponent

√4624 = √c² < simplify square roots

68 = c

the length of the missing side is 68ft. to see if this is right, we can plug it into the formula to check but its not necessary.  

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How tall is the flag pole (please give explanation too)
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Answer:

  22 3/4 ft

Step-by-step explanation:

The diagram seems to show a 6 1/2 ft person casting a 9 ft shadow at the same time a flagpole is casting a 31 1/2 ft shadow. You want the height of the flagpole.

<h3>Proportion</h3>

Shadow lengths are presumed proportional to the height of the object making them. This means ...

  h/(31 1/2) = (6 1/2)/9 . . . . . all lengths in feet

Multiplying by 31 1/2, we get ...

  h = (31 1/2)(6 1/2)/9 = (819/4)/9 = 91/4

  h = 22 3/4 . . . . ft

The flagpole is 22 3/4 feet tall.

3 0
2 years ago
Some banks now use continuous compounding of an amount invested. In this case, the equation that models the value of an initial
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In this case, the equation that models the value of an initial investment of P dollars in t years at an annual interest rate of r is given by A = Pert.

Step-by-step explanation:

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Erica uses 9 gallons of gas to drive 198 miles. How many miles can he drive using 1 gallon of gas?
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Step-by-step explanation:

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3 years ago
A private and a public university are located in the same city. For the private university, 1038 alumni were surveyed and 647 sa
Snezhnost [94]

Answer:

The difference in the sample proportions is not statistically significant at 0.05 significance level.

Step-by-step explanation:

Significance level is missing, it is  α=0.05

Let p(public) be the proportion of alumni of the public university who attended at least one class reunion  

p(private) be the proportion of alumni of the private university who attended at least one class reunion  

Hypotheses are:

H_{0}: p(public) = p(private)

H_{a}: p(public) ≠ p(private)

The formula for the test statistic is given as:

z=\frac{p1-p2}{\sqrt{{p*(1-p)*(\frac{1}{n1} +\frac{1}{n2}) }}} where

  • p1 is the sample proportion of  public university students who attended at least one class reunion  (\frac{808}{1311}=0.616)
  • p2 is the sample proportion of private university students who attended at least one class reunion  (\frac{647}{1038}=0.623)
  • p is the pool proportion of p1 and p2 (\frac{808+647}{1311+1038}=0.619)
  • n1 is the sample size of the alumni from public university (1311)
  • n2 is the sample size of the students from private university (1038)

Then z=\frac{0.616-0.623}{\sqrt{{0.619*0.381*(\frac{1}{1311} +\frac{1}{1038}) }}} =-0.207

Since p-value of the test statistic is 0.836>0.05 we fail to reject the null hypothesis.  

6 0
3 years ago
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