Charlie is eating an ice cream cone and wants to know the radius of the cone. On the packaging of the ice cream cone, he notices that the height of the cone is three times the length of the radius of the cone. He knows that the cone can hold V cubic centimeters of ice cream. Which of the following functions would best model the situation above?

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.