Nina will need $23,500 in 6 years for a new car. How much should she invest now at 7.8% annual interest, compounded quarterly, to reach her goal?

Acircle has the equation (x-2)^2 +y^2 =5. what are the coordinates of the circle's center?

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earned $75 in interest.how much interest will she earn during the following year?

What is the area of the shaded sector?