7m
6m
3m

Find rev surface area of each prism

Can someone me with this problem i don't understand i need

Give all possible names for the line shown. calculation tip: lines can be written with either point first.

Evaluate the expression for the given value of the variable. | ? 4 b ? 8 | + ? ? ? 1 ? b 2 ? ? + 2 b 3 -4b-8+-1-b2+2b3 ; b = ? 2 b=-2