The diameter of a semicircle is 8 miles. What is the semicircle's perimeter? Use 3.14 for .

Mathematics

2 answers:

deff fn [24]3 years ago

8 0

Answer:

Circumference of the semicircle $=12.56 miles$

Step-by-step explanation:

Diameter of the semicircle= $8 miles$

Radius of the semicircle= $8/2=4 miles$

Perimeter of a circle or semicircle is called its Circumference:

Circumference of a circle= $2*\pi *r$

Circumference of a semicircle= $\frac{2*\pi *r}{2}=\pi *r$

As, $\pi =\frac{22}{7}=3.14$

Putting the values in the formula of the circumference of the semicircle:

Circumference of the semicircle= $3.14*4$

$=12.56 miles$

The Circumference of the semicircle with the radius of 4 miles $=12.56 miles$

wlad13 [49]3 years ago

7 0

Answer:

41.13 cm

Step-by-step explanation:

ITSSSS RIGHTTTTTTTTT

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The ratio of isabellas money to shanes money is 3:11. If isabella has $33, how much money do Shane and Isabella have together?

solong [7]

The ratio of Isabella’s money to Shane’s money is 3:11

Isabella has $33.

We can make a proportion to solve for how much money Shane has.
A proportion is two ratios that are set equal to each other.

Let’s call Shane’s money ‘S’

We get this proportion:   3/11 = 33/x

If we cross multiply we get:
(33) * (11) = (3) * (x)

Simplifying it, we get:
363 = (3) * (x)

Divide both sides by 3, we get:
x = 121

However, the question asks how much money they have together.

Isabella + Shane = Total
33 + 121 = $154

<span>They have $154 together.</span>

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g100num [7]

Answer:

Hello, Hope it helps :-)