The distribution of the scores on an exam is closely described by a normal curve with mean of 100 and standard deviation of 9. a) what percent of students (to the nearest tenth of a percent) scored lower than the student with an exam score of 115? b) what is the cutoff exam score for being in the highest 40%. c) if 180 students took the exam, how many scores do you think were below 40? Explain

D(5, 7). e(4,3), and f(8, 2) form the vertices of a triangle. what is mzdef? oa. 30° ob. 45° oc. 60° od 90°

Find the ratios of the corresponding sides

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.