How many members are in the senate ? how often are they elected? ?

100 members are in the senate. They have 6 year terms and only about 1/3 will get re-elected.

Explanation:

for part one 100 members in the senate. For part two Senators serve terms of six years each and since that there are 100 senators roughly one-third of the seats are up for election every two years.

Explanation:

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34

determination