Simplify. (-3ab3)4
a.) -12a 4b 7
b.) -7ab 12
c.) -81a 4b 7
d.) 81a 4b 12

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

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.