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77julia77 [94]
3 years ago
13

The area A of a circle in square feet with a radius r in feet is given by the formula, A=πr2. What is the area of a circle with

a radius of 3 feet? Round your answer to the nearest thousandths.
Mathematics
1 answer:
alekssr [168]3 years ago
3 0

Answer:

28.29

Step-by-step explanation:

A=πr2

=3.14(3^2) (btw the ^2 is exponent)

=3.14(9)

=28.29

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Round 4,343 to the nearest thousand.
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10. A cylindrical can has a base with a diameter of 6 cm. Its height measures 5 cm. What is the total surface area of the can?
eduard

Answer:

  • Total surface area of cylinderal can is 150.8 cm²

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

Given that a cylinderal can has base with a diameter of 6 cm and its height measures 5 cm.

So,

Radius = Diameter/2 = 6/2 = 3 cm

We know that,

  • TSA of cylinder = 2πr(h + r)

Substituting required values:

➝ TSA = 2 × 22/7 × 3(5 + 3)

➝ TSA = 44/ 7 × 3 × 8

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➝ TSA = 150.8 cm²

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