Evaluate this exponential expression. 3 • (5 + 4)2 – 42 =

Step-by-step explanation:

Given the exponential expression , it is necessary to follow these steps to evaluate it:

Make he addition inside the parentheses:

The exponent 2 indicates that you must multiply 9 by itself twice, then:

Now you need to multoply 3 by 81:

And finally, you must make the subtraction indicated. Then:

Two possible answers are:

2/20 gallons per minute and 3/30 gallons per minute.

Explanation:

To find equivalent ratios, we are finding equivalent fractions.  To do this, we would multiply the numerator and denominator of the original fraction, 1/10, by the same constant.

(1*2)/(10*2) = 2/20 and (1*3)/(10*3) = 3/30.