It cost 3.99 for 25 oz and 6.99 for 90oz which is better and why

First is to find out which price is lower for each when it's only for one ounce.

1) 3.99 / 25 = x / 1

Cross multiply.

3.99 = 25x

Divide both sides by 25.

0.1596 = x

Round to the nearest cent.

$0.16 per ounce

2) 6.99 / 90 = x / 1

Cross multiply the fractions.

6.99 = 90x

Divide both sides by 90.

0.0776667 = x

Round to the nearest cent.

$0.08 per ounce.

6.99 for 90oz is better because it is cheaper by 8 cents per ounce.

  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.

f(-2) = -3f(1) = 6 . . . estimated from f(x) = (x+2)^2-3, which matches points on the graph (-1,-2) and (0, 1)

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

the table tells us

g(-2) = 1g(1) = 31

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).

20 percentage, you can also do it on a calculator.