Answer asap worth 17 pts

a delivery truck drove 203 miles in 3.5 hours. after unloading and loading new cargo, it traveled on another 243 miles for 4.5 hours.
what was the average speed of the truck over its entire route?

a.
55.75 mi/h

b.
56 mi/h

c.
58 mi/h

d.
63.7 mi/h

Bed a is seven feet long. bed b is 7/8 of bed a. bed c is 7/8 of bed b. bed d is 7/8 of c. a. come up with an expression for the length of bed d. b. what is the length of bed d?

Aboard 60 in. long is cut two parts so that the longer piece is 5 times the shorter. what are the length of the two pieces?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.