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2 years ago

Find the radius of a sphere with a surface area of $4\pi$ square feet.

Mathematics

1 answer:

nataly862011 [7]2 years ago

6 0

Answer:

r = 1 feet

Step-by-step explanation:

Given that,

The surface area of the sphere, A = 4π feet²

We need to find the radius of the sphere.

The formula for the surface area of the sphere is given by :

$A=4\pi r^2$

Where

r is the radius of the sphere

Put all the values,

$4\pi = 4\pi \times r^2\\\\r=1$

So, the radius of the sphere is equal to 1 feet.

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Let be "x" the acres Cammie can mow in one hour.

You know that she can mow $\frac{1}{2}\ acre$ in 25 minutes, then you can set up the following proportion (Remember that 1 hour has 60 minutes):

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Therefore, she can mow $1\frac{1}{5}\ acres$ in one hour.

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