Jie buys lunch at a local café for $8.60. If she leaves a 15% tip, how much does she spend at the café?

$9.89

Step-by-step explanation:

15% as decimal = 0.15

0.15(8.60) = 1.29

1.29 tip + 8.60 = $9.89

Jie spends $9.89 at the cafe

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  b.   the average rate of change of f(x) is less than the average rate of change of g(x).

step-by-step explanation:

since the length of the interval is the same in each case, we only need to compare the change in y-value to see which is greater.

so the change in y-value for function f is (6 )) = 9.

the table tells us

so the change in y-value for function g is (31 -1) = 30.

the change in y-value of f(x) on the interval is less than the change in y-value of g(x) on the same interval, so the average rate of change of f(x) is less than the average rate of change of g(x).