Answer :

V=πr^2h
V=π49*10
V=490π
V=1538.6
Which would be B
V = πr²h
V = (3.14)(7)²(10)
V = (3.14)(49)(10)
V = (3.14)(490)
V = 1,538.6ft³

It is equal to none of the answers because it is equal to 1,538ft³.