F(a)=3a-1
g(a) = a + 4a
Find f(4a) - g(4a)

Answer is -(8a + 1)

Step-by-step explanation:

⇒ f(4a) = 3(4a) - 1 = 12a - 1

⇒ g(4a) = (4a) + 4(4a) = 4a + 16a = 20a

⇒ f(4a) - g(4a) = 12a - 1 - 20a = -8a - 1 = -(8a + 1)

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!