How much heat is absorbed by 20g granite boulder as enegry from the sun causes its temperature to change from 10 celsius to 29 celsius?

m = mass of granite boulder = 20 g

c = specific heat of granite boulder = 0.79 J/gC

T₀ = initial temperature of granite boulder = 10 °C

T = final temperature of granite boulder = 29 °C

Q = heat gained by granite boulder as energy from the sun

heat gained by granite boulder is given as

Q = m c (T - T₀)

inserting the values

Q = (20) (0.79) (29 - 10)

Q = 300.2 J

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2