4) A tire manufacturer advertises that their tires last 40,000 miles. A customer questions the claim as being overstated, and does a survey of 100 tires and finds the mean life to be 36,000 with a standard deviation of 3,500 miles. Test the hypotheses at a .10 level.

2.   2 3/5.

3.   2 1/2.

step-by-step explanation:

6 - 3 2/5

= 6 -   17/5

= 30/5 - 17/5

= 13/5

= 2 3/5 (answer).

5 1/4 - 2 3/4

= 21/4 - 11/4

= 10/4

= 2 1/2 (answer).

- both graphs increase on their domain.

- the graphs of both functions have the same x-intercept.

- neither graph has a y-intercept.

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step-by-step explanation: