License plates are made using letters followed by digits. How many plates can be made if repetition of letters and digits is allowed

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

Ana earns 2.5% simple interest on $2,000 in her savings account. she does not make any deposits or withdrawals. after 3 years, how much interest will ana have earned on her savings account?