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sesenic [268]
3 years ago
13

Find the area of a semi-circle with radius, r = 2cm.

Mathematics
1 answer:
hoa [83]3 years ago
5 0

Answer:

The answer is 2pi

Step-by-step explanation:

To find the area of a cirlce, use the equation ( pi * r^2 ) so for a semi circle, which is half, simply divide that by 2. Plug in 2 for radius and you get 4pi/2 which simplifies to 2pi.

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Help fast please!! How many books does Marian have??
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Answer:

0 because he has no books

Step-by-step explanation:

8 0
3 years ago
You will receive $15000 I’m two years when you graduate. You plan to invest this at an annual interest rate of 6.5 percent. How
Crank

You will have $24 824.94 eight years from now.

The formula for the future value (FV) of her investment is

FV =<em>C</em>(1 + <em>r</em>)^<em>n</em>

where <em>C</em> = her initial cash

<em>r</em> = the interest rate

<em>n</em> = the number of years

FV = $15 000(1.065)^8 = $24 824.94

7 0
3 years ago
If Ross earns a 5% commission on what he sells, how much he earn on $60.
Studentka2010 [4]
So 5% of $ 60
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8 0
3 years ago
Read 2 more answers
8. A 140-pound female has three mixed drinks one right after the other.
Sonja [21]

The BAC of the female is an illustration of proportion

  • The BAC after consuming the three drinks is 0.029w
  • The BAC three hours after consuming the drinks is 0.087 w

<h3>How to calculate the BAC?</h3>

BAC is calculated using:

BAC = Alcohol consumed/(Body Weight * R)

The weight is given as:

Body weight = 140 lb

Convert to kg

Body weight = 63.5 kg

For female

R = 0.55

So, we have:

BAC = Alcohol/(63.5 * 0.55)

BAC = Alcohol/34.925

BAC = 0.029Alcohol

The weight or volume of the alcohol consumed is given.

So, we represent it with w.

BAC = 0.029w

Hence, the BAC after consuming the three drinks is 0.029w

<h3>How to calculate the BAC after 3 hours?</h3>

We have:

BAC1 = 0.029w

Time (t) = 3 hours

The BAC after 3 hours is

BAC = BAC1 * (t - 0.015)

So, we have:

BAC = 0.029w * (3 - 0.015)

Evaluate the product

BAC = 0.087w

Hence, the BAC three hours after consuming the drinks is 0.087 w

Read more about BAC at:

brainly.com/question/1781657

7 0
3 years ago
A healthy human heart beats about 1,533,000 times a year. A sparrow's heart beats about 241,776,000 times in a year. About how m
Galina-37 [17]

Answer:

About 158 times

Step-by-step explanation:

Represent the rate of human heart with H and sparrow's heart with S

H = 1,533,000\ times

S = 241,776,000\ times

Required

Determine how many times faster is S than H

To do this, we simply divide S by H i.e.

Number = \frac{S}{H}

Number = \frac{241,776,000}{1,533,000}

Number = 157.714285714

Number = 158 --- approximated

<em>Hence, the sparrow's heart beats about 158 times faster than the human hearts</em>

5 0
3 years ago
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