The school athletic director had a budget of $1000 to purchase 300 items for the football team. She purchased cones for $1 each, footballs for $10 each, and socks for $3 each. She purchased 50 more
cones than footballs. How many socks did she buy?

List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.

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.

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.