Sam can prepare 20 wall paintings in four weeks. how much time will he need to prepare 80 wall paintings

1st week= 20 walls

2nd week= 20+20=40 walls

3rd week= 20+20+20=60 walls

4th week= 20+20+20+20=80 walls

Therefore, in 4 weeks 80 walls in total will be painted

  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).

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step-by-step explanation: