7E6 or 7 x 10 to the sixth power
they both mean the same thing, they just are written different.
The equation to find volume is V=

r²h and you know all of your numbers other than h so you plug all that in. 100=3.14×2²×h → 100=3.14×4×h → 100=12.56×h → Divide 12.56 from both sides 100÷12.56=12.56×h÷12.56 → 7.96cm=h.
I hope that helps!
Answer:
I think the answer is not proportional for B I'm sorry if it is wrong
Step-by-step explanation: