Find the value of x in 4000(1.5^x)=25000

What is the exact volume of the cylinder? 16in going into the middle of the top of the cylinder and 40in in height a) 25,600(pi)3 b)10,240(pi)3 c)1280(pi)3 d)640(pi)3

Which expression is equivalent to 5r6141 2r+st6

Def rotates 90 clockwise about point a to create d’ e’ f’. therefore, which equation must be true ?