A marketing firm claims that its ad campaign will increase sales for a fast-food chain by
15%. In a random sample of 25 stores, the average increase in sales was 16% with a
standard deviation of 5%.
What is the z value for the this example rounded to the nearest hundredth?

The following frequency table relates the weekly sales of bicycles at a given store over a 42-week period.value01234567frequency367108521(a) in how many weeks were at least 2 bikes sold? (b) in how many weeks were at least 5 bikes sold? (c) in how many weeks were an even number of bikes sold?

Find the domain and range of the following function f(x) = 51x - 21+ 4

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50