Hannah school hosted a book donation. there are 150 students at her school, and they don’t need a total of b books! hannah donated 3 times as many as the average number of books each student donated.

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation:

the height of the surface increases from the center out to the sides of the road.

step-by-step explanation:

as we move out we move away from the x-axis.

and as mentioned in the problem statement that height of a road increases when we move away from the center x.

hence proved that 3rd option

the height of the surface increases from the center out to the sides of the road.

is the correct option.

mujhko hui na