Which is a cheaper per song? a) $12 for 15 songs b) $9 for 10 songs

Which expression do you get when you eliminate the negative exponents of 4a^2 b^216a^-3 b

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

According to a study conducted in 2015, 18% of shoppers said that they prefer to buy generic instead of name-brand products. suppose that in a recent sample of 1500 shoppers, 315 stated that they prefer to buy generic instead of name-brand products. at a 5% significance level, can you conclude that the proportion of all shoppers who currently prefer to buy generic instead of name-brand products is higher than .18? use both the p-value and the critical-value approaches.