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Rasek [7]
3 years ago
11

The diameter of a circle is 6 cm. Find its area to the nearest tenth.

Mathematics
2 answers:
Kruka [31]3 years ago
8 0

Answer:

28.27cm²

Step-by-step explanation:

formula:

A=πr²

d = 2r

Solving for A

A=1/4π d² = 1/4 · π · 6² ≈ 28.27433cm²

rounded: 28.27cm²

hope this helped!

Assoli18 [71]3 years ago
7 0

Answer:

= 28.26 {cm}^{2}  \\

Step-by-step explanation:

d = 2r \\ 6 = 2r \\  \frac{6}{2}  =  \frac{2r}{2}  \\ r = 3

area = \pi {r}^{2}  \\  = \pi \times 3 \times 3 \\  = 28.26 {cm}^{2}

hope this helps

brainliest appreciated

good luck! have a nice day!

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6 0
2 years ago
Joshua's family took a road trip to Mount Rushmore. Joshua fell asleep 35% of the way through the trip. If the total length of t
stiks02 [169]
You need to calculate 35% of 400.

The way I do this on paper is I split it up into chunks and then add the chunks together.

First I would calculate 10%. To do this, divide 400 by 10, because to get from 100% to 10% you must divide by 10.

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4 0
3 years ago
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A gum ball has a radius that is 30mm. The radius of the gumballs spherical hollow core is 28mm. What is the volume of the gum ba
Arada [10]

Answer:

V = 21145.01 mm³

Step-by-step explanation:

Given that:

The radius of the gumball = 30  mm

The radius of the spherical hollow-core = 28 mm

Consider the radius of the gumball to be r_2 and the radius of the spherical hollow-core to be r_1. Then;

The volume of the gumball can be determined by using the formula of a sphere.

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