Tool bella bought 10 copies of jake's first cd at $14.56 per copy how much did she spend?

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

What is the difference between regular convex and concave polygons

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?