Study the example showing how to find the unit rate. then solve problems 1-7. example a bus driver made 100 stops on his route in 5 days. the double number line shows the relationship between the number of stops and the number of days. stops 0 20 40 60 80 100 120 140 150 days 0 1 2 3 4 5 6 7 8 in the diagram, 100 and 5 represent the ratio of 100 stops to 5 days. you can write a multiplication equation to show how 5 days and 100 stops are related. 5 x 20 = 100 look at the corresponding pairs of numbers on the number lines. write a multiplication equation to show how 3 days and 60 stops are related. repeat for two other corresponding pairs of numbers. 2 what is the relationship between the number of stops and each corresponding number of days? 3 what is the rate of stops per day? what is the unit rate? vocabulary rate a ratio that compares the first quantity to only one of the second quantity. unit rate the number in a rate that is being compared to 1. rate: unit rate:
Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?
The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?