Check for Understanding
A super-ball has a 75% rebound ratio-that is, when it bounces repeatedly, each bounce is 75% as high as the previous bounce. When you drop it from a height of 20
feet how high does the ball bounce on the eighteenth bounce? Round your answer to the nearest hundredths.

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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.

What will be the end result for the taxpayer who filed his federal income tax return using the 1040ez form shown belowa he'll owe $173b he'll receive a refund of $173c he'll owe $3921d he'll receive a refund of $3921