While exercising, carly burns 450 calories per hour biking and 620 calories per hour playing racquetball. sarah burns 560 calories per hour running and 510 calories per hour playing squash. in a workout consisting of 30 minutes of each respective exercise, who burns more calories? select one: a. carly burns more calories. b. sarah burns more calories. c. both girls burn the same amount of calories. d. this cannot be determined from the information given.

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

Suppose that 3% of all athletes are using the endurance-enhancing hormone epo (you should be able to simply compute the percentage of all athletes that are not using epo). for our purposes, a “positive” test result is one that indicates presence of epo in an athlete’s bloodstream. the probability of a positive result, given the presence of epo is .99. the probability of a negative result, when epo is not present, is .90. what is the probability that a randomly selected athlete tests positive for epo? 0.0297