I need help with #65to #76 ASAP please and thank you …. Could someone please help me with it… I need to get it done ASAP .. I need the answers for all of them ASAP

Peaches cost $4.29 per pound. find the cost of two and a quarter pounds of peaches.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?