Keke paid $16 for a manicure. If it was originally priced at $48, what was her percent discount?

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply

The mean of 10 values is 19. if further 5 values areincluded the mean becomes 20. what is the meanthese five additional values? a) 10b) 15c) 11d) 22

What is the area of a rectangle with vertices (-8,-2), (-3,-2), (-3,-6), and (-8,-6)? units