Graph A shows function f of x equals 3 multiplied by 3 to the power of x. Graph B shows function f of x equals 9 to the power of x. Graph C shows function f of x equals 3 multiplied by 3 to the power of negative x. Graph D shows function f of x equals 9 to the power of negative x. Which graph best shows the function f(x) = 3(3)−x to represent the rate at which a radioactive substance decays?

Graph A
Graph B
Graph C
Graph D

What numbers are included in the set of integers? what numbers are not included?

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

The krasnapolski is a top-of-the-line hotel in amsterdam, the netherlands. among their many services, they rent bicycles to guests. the bicycle checkout is open 24 hours per day 7 days per week and has 50 bicycles on hand. on average, 10 guests request a bicycle each day, arriving completely randomly at all times of the day during the spring and summer seasons. guests keep bicycles for four days on average, with a standard deviation of two days. how long does a guest on average have to wait for a bike? a. approximately 24 hours b. approximately 0.033 hours c. approximately 4 days d. approximately 47 minutes