how do i solve this infinite geometric series? 64/25-16/5+4-5

Which of the following is true for the relation f(x)=2x^2+1

Acylinder with a base diameter of x units has a volume of jxcubic units which statements about the cylinder are true? check all that apply. the radius of the cylinder is 2 x units. the radius of the cylinder is 2x units. the area of the cylinder's base is 200 square units. the area of the cylinder's base is a square units. the height of the cylinder is 2x units. the height of the cylinder is 4x units. mark this and return save and exit next submit

Atown has a population of 12000 and grows at 3.5% every year. what will be the population after 7 years, to the nearest whole number?