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3 years ago

What expression represents the area of a circle with a radius of 7 units

Mathematics

1 answer:

Gwar [14]3 years ago

4 0

Answer:

The area of the circle is 153.86 u²

And the expression is

a = π * (7 u)²

Step-by-step explanation:

To solve this problem we need to use the area formula of a circle:

a = area

r = radius = 7 units

π = 3.14

a = π * r²

we replace with the known values

a = π * (7 u)²

a = 3.14 * 49 u²

a = 153.86 u²

The area of the circle is 153.86 u²

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Greeley [361]

Answer:

The answer is 660.4 millimeters in diameter.

Step-by-step explanation:

The wheel is 26 inches in diameter. An inch is 25.4 millimeters. 26 * 25.4 = 660.4

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4 years ago

Hint: the distance on the map from Charlotte to<br> Winston-Salem is 1.6 cm.

Kobotan [32]

Answer:

120km

Step-by-step explanation:

If 1cm=75 km then 1.6cm=120km

Just multiply 1.6 with 75

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4 years ago

$18.75 to $18.60 identify the percent of change as an increase or decrease . then find the percent of change round to the neares

kati45 [8]

18.60 / 18.75 = .992
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We know that since the numbers are lower, the percentage change is a decrease.

4 0

4 years ago

Answer to this math question?

Gennadij [26K]

Answer:

Option 4

Step-by-step explanation:

<h3>Volume of Cone:</h3>

h = x units

diameter = x units

r = (x/2) units

$\sf \boxed{\text{ \bf Volume of cone = $\dfrac{1}{3} \pi r^2h$}}$

$\sf =\dfrac{1}{3}*\pi * (\dfrac{x}{2})^2*x\\\\=\dfrac{1}{3}*\pi*\dfrac{x^2}{4}*x\\\\=\dfrac{1}{12}\pi x^3$

4 0

2 years ago

Solve for w in the proportion.<br> W/99 = 2/9 W= ?

Ann [662]

Answer:

Step-by-step explanation:

$\frac{W}{99} = \frac{2}{9} \\$

<u>Cross multiply</u>

We have

$9W = 2 \times 99 \\ 9W = 198$

<u>Divide both sides by 9</u>

$\frac{9W}{9} = \frac{198}{9} \\$

We have the final answer as

Hope this helps you

7 0

3 years ago