Help.

Aflower has 26 chromosomes. to create a new flower, how many would a sperm cell have what is called?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = 7ex, y = 7e^-x, x = 1; about the y-axis