Tony's Pizza made 52 pizzas today. If each pizza contains 12 slices, estimate how many slices of pizza Tony's Pizza Place made by rounding both numbers to the nearest ten.

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

As a self-employed seamstress, you know that it takes 7 yards of material to make 3 jackets. you bought 15 yards of material to make 7 jackets. did you buy enough material? if not, how much were you over or under?