Scarlet has $85 to spend at the pet store. She is definitely buying a catfish for $12, a rainbow fish for $13, and a betta fish for $14. Scarlet wants to use whatever money she has left over to buy some hermit crabs, which cost $8 each. There is no tax on the purchases. Write the inequality that Scarlet can use to describe how many hermit crabs she can buy. Use x to represent the number of hermit crabs.

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.

6. sarah saved $12.75 every week for a number of weeks, w. she received an additional $25 during the last week in which she saved money. write and solve an equation to find the number of weeks, w, for which sarah had saved money if she has $114.25 now.