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expeople1 [14]
3 years ago
12

The diameter of a semicircle is 6 miles. What is the semicircle's perimeter?

Mathematics
2 answers:
koban [17]3 years ago
5 0

Answer:

15.42mi

Step-by-step explanation:

Use the formula for a semicircle's perimeter.

P=\frac{1}{2}\pi *d+d

Plug in 6 for d.

P=\frac{1}{2}\pi*6+6

Let's use 3.14 for \pi, just to make it easier, but of course, if it states to round it to something else, just plug in that many values for \pi.

P=\frac{1}{2}(3.14)*6+6 \\ \\ P=1.57*6+6 \\ \\ P=9.42+6 \\ \\ P=15.42

Yuliya22 [10]3 years ago
3 0

Answer:

Step-by-step explanation:

The perimeter = pi * d + d

d = 6 miles

The perimeter = pi*6 + 6       This is one possible answer

perimeter = 6*3.14 + 6

perimeter = 18.84 + 6

perimeter = 24.84                  Which is another possibility

If you have choices, please list them.

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aliya0001 [1]

Given:

$ 1.50 / gallon

1 gallon = 28 miles;

Solution:

$ 24.00 / $ 1.50 = 16 gallons

16 gallons x 28 miles = 448 miles

have a nice day:)

4 0
3 years ago
Read 2 more answers
Solve for x:<br> 3/4 Y -7=5
olchik [2.2K]

Answer:

16

Step-by-step explanation:

3/4y-7=5

*multiply both sides of the equation by 4

= 3y-28=20

*move <u>constant</u> to the right-hand side and change its sign

=3y=20+28

*add the numbers <u> </u>

=3y=48

*divide both numbers by 3

and that's how you get 16

3 0
3 years ago
Read 2 more answers
Dwayne has $40 in a savings account that earns
kvasek [131]

Answer:

He'll have $42.

Step-by-step explanation:

5% annually means that he'll have 5% more in his account after one year. That's exactly what the question asks.

So it's just a matter of adding 5% to $40.

$40 + ($40 * 0.05) = $40 + $2 = $42

5 0
3 years ago
A teacher is experimenting with computer-based instruction. In which situation could the teacher use a hypothesis test for a pop
kvv77 [185]

Answer:

Step-by-step explanation:

The situation is a case of matched or paired samples since the samples are dependent. The two measurements are drawn from the same pair of individuals The parameter that is tested using matched pairs is the population mean and this is what teacher intends to use a hypothesis test for.

The correct option is

A) She gives each student a pretest. Then she teaches a lesson using a computer program. Afterwards, she gives each student a post test. The teacher wants to see if the difference in scores will show an improvement.

5 0
3 years ago
Solve for xxx. Enter the solutions from least to greatest.<br> x^2 + x - 30 = 0x <br> 2<br> +x−30=0
AfilCa [17]

Given:

The quadratic equation is:

x^2+x-30=0

To find:

The solutions of the given equation.

Solution:

We have,

x^2+x-30=0

Splitting the middle term, we get

x^2+6x-5x-30=0

x(x+6)-5(x+6)=0

(x+6)(x-5)=0

Using zero product property, we get

x+6=0 and x-5=0

x=-6 and x=5

Therefore, the solutions of the given quadratic equation are -6 and 5.

6 0
3 years ago
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