The cost of lollipops at Bulk Barn varies directly with the amount one buys. If Mary bought 1.3 kg of lollipops for $5.43, what is the rate of change?

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?