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ad-work [718]
3 years ago
9

What is the area of a semicircle whose perimeter is 72cm

Mathematics
1 answer:
Nuetrik [128]3 years ago
7 0

Answer:

A = 307.9 sq/cm

Step-by-step explanation:

Find the radius of the semi-circle

diameter + half the circumference = 72 cm

2r + pi*r = 72

r(2+pi) = 72

 

r = 72%2F%28%282%2Bpi%29%29

r = 14

:

what will be the area of that semicircle?

A =1%2F2*pi%2A14%5E2

A = 307.9 sq/cm

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Please help. thanks
BigorU [14]

12 • 16 = 192

5 • 3.14 = 15.7 15.7/2= 7.85

192 + 7.85 = 199.85

The area of the objective is 199.85

4 0
3 years ago
Trevor saves 2/3 of the money he earns at his after-school job. Suppose Trevor starts saving 1/4 as much as he s saving now. Wil
Vlad [161]
Trevor will be saving less.
If he saves a fraction of what he is currently saving he is saving a part .
Which means that he will be saving less.
4 0
3 years ago
Nik, a social worker for a county, helps county residents who are struggling with different issues. Nik logs the following hours
True [87]

Answer:

B

Step-by-step explanation:

The question is:

<em>What percent of time did Nik spend with clients on Thursday? </em>

<em>a. 10% </em>

<em>b. 70% </em>

<em>c. 30 % </em>

<em>d. 80%</em>

<em />

<u>Solution:</u>

c means client meetings and o means other work.

The hours are shown in the table.

We want % of time on Thursday that he spent on clients.

In Thursday:

7c and 3o

Means 7 hours with clients and 3 hours with office work.

Total time spent = 7 + 3 =  10 hours

Client time spent = 7 hours

% time spent with clients on Thursday: 7/10 = 0.7 * 100 = <u>70%</u>

<u>Answer choice B is right.</u>

6 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
777dan777 [17]

Answer:   (C) 13,120

<u>Step-by-step explanation:</u>

Given the sequence {4, 12, 36, 108, ... , 8748} we know that the first term (a) is 4 and the ratio (r) is \dfrac{12}{4}=3

Input the values above into the Sum formula:

S_n=\dfrac{a(1-r^n)}{1-r}\\\\S_8=\dfrac{4(1-3^8)}{1-3}\\\\.\quad=\dfrac{4(1-6561)}{-2}\\\\.\quad=\dfrac{4(-6560)}{-2}\\\\.\quad=-2(-6560)\\\\.\quad=13,120

5 0
3 years ago
Difference of 8 Let's dig into this and find out for sure. First think of two numbers that have a difference of 8. Type the LARG
Serhud [2]

Answer:

<u>16</u>

Step-by-step explanation:

We need to find 2 numbers that have a difference of 8.

Let take's 16 and 8.

As we know :

⇒ 16 - 8

⇒ <u>8</u>

<u />

The larger of these 2 numbers is <u>16</u>

5 0
1 year ago
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