Question

3. The diameter of Earth's moon is on average 3.8 x 10 m. Use the formula A - 4ter to find the approximate surface area.

(Use 3.14 for the value of

Answer 1

Answer:Diameter of the moon = d = m

The moon is approximately spherical in shapes, so we can use the formula of surface area of a sphere to approximate the surface area of the moon.The formula for surface area of a sphere is:

S*A=4\pi r^{2}

r=d/2=3.8*10^{8}/2

1.9*10^{8}

r is the radius of the mood, which is equal to half of the diameter. So,

S*A=4*3.4(1.9*10^{8})^{2}

S.A= (12.56)3.61*10^{16}

S.A= 4.5*10^{17}

So, the surface area of moon will be: S.A= 4.5*10^{17}

Answer 2

`A = 45.3416.10^(14)`
`m^(2)`

Explanation:

Since, we know that the surface area of a sphere is:

`A = 4\pi r^(2)`

But, radius in this case is 38/2
`.10^(6)`m.

therefore, Approximate surface area should be:

`A = 4.(3.14). (1.9.10^(7))^(2)`

`A = 45.3416.10^(14)`
`m^(2)`