19/20 and 23/25 common denominator

If n stands for number sold and c stands for cost per item, in which column would you use the formula: ? a. column d c. column f b. column e d. column g

Subscriptions to a popular fashion magazine have gone down by a consistent percentage each year and can be modeled by the function y = 42,000(0.96)t. what does the value 42,000 represent in the function?

Which is the solution to the inequality? 2 3/52 1/15 b< 3 2/15 b> 3 2/15