HI I JUST DID THE FIRST ONE . SORRY I CAN'T ANSWER THE 5TH AND6th IT'S HARD
Answer:
if 9x8 =72
then 56/8= 7
x=7
The radius would be 12cm
and the height 4
gives u the surface area of 1206cm^3
Step-by-step explanation:
( u ÷ 3) times 7
Must know what u equals to find actual answer to equation.