There is a traffic light at the intersection of main street and durham avenue. the traffic light on main street follows a cycle. it is green for 30 seconds, yellow for 5 seconds, and red for 25 seconds. as you travel along main and approach the intersection, what is the probability that the first color you see is green?

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.