For a given population of high school seniors the SAT in math has a mean score of 500 with a standard deviation or 100. SAT scores are normally distributed. What is the probability that a randomly selected high school senior’s score on the math SAT will be more than 725?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.