Is 8. A company gives each client a unique
account number containing four letters
followed by three digits. How many
account numbers are possible?

Sasha invests $1000 that earns 8% interest compounded annually. write a function that describes the value, v, of the investment after t years.

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4πr2. write your answer in scientific notation.