As a construction engineer for a city, you are responsible for ensuring that the company that is providing gravel for a new road puts as much gravel in each truckload as they claim to. it has been estimated that it will take 500 truckloads of gravel to complete this road, so you plan to measure the volume of gravel in an srs of 25 trucks to make sure that the company isn't delivering less gravel per truckload than they claim. each truckload is supposed to have 20 m3 of gravel, so you will test the hypotheses 0 : 20 : 20 h versus h p a p at the d = 0.05 level.

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period. value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

Astudent is determining the influence of different types of food on the growth rate of spiders. she feeds one group of spiders two caterpillars twice a week. the other group received similarly-sized beetles twice a week. she records the amount of time required for individuals to reach sexual maturity. her hypothesis is that the spiders feeding on caterpillars will have a faster growth rate because caterpillars have a higher protein content compared to beetles. in this experiment, what is the dependent variable? spiders assigned to different feeding groups. time required to reach sexual maturity number of prey items fed twice a week. growth rates of each group.