I don't know the formula or how to figure this out. help me out but no links tho

Step-by-step explanation:

a) vol rectangular + vol half cylinder = vol prism

b) find the area for all the surface one by one

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

the formula of a slope:

we have the points (-2, 7) and (2, 3). substitute: