Richard can do a job in eight hours that Randy needs 13 hours to do. If Brandon works four hours before Richard joins him how long does it take the two of them to finish the work?

Find the mass and center of mass of the S solid bounded by the paraboloid z = 6x2 + 6y2 and the plane z = a (a > 0) if S has constant density K. Use cylindrical coordinates.

What is the value of f if f + I-3 11/12 = 18

Last month, Maria purchased a new cell phone for $500. The store manager told her that her new cell phone would depreciate by 70% every 6 months. Maria thinks she will want to replace her phone after a while.

Solve this equation 2cos^2x-9cosx-5=0

T=4st/s-t what is the value of s when t = 5 and T = 40?

382.993 rounded to the nearest hundredth?

Their sum is 7, and their product is 15

Which expression has the same value as - 18: (-9) -18:2 -12: (-3) -10:5 -8: (-4)

Jim uses ribbon for bookmarks. Jim has 9 feet of ribbon. He uses 1/3 foot of ribbon to make each bookmark. What is the total number of ribbons Jim can make from 9 feet of ribbon?

At a car repair shop, the cost of a repair depends on the time the mechanic works. Which of the following shows this idea expressed in Function notation?