Nigel's class placed 10 empty rain gauges on the playground Monday morning, The line plot below shows the number of inches of rainwater in each gauge after it rained
Monday afternoon
Number of Inches of Rainwater
x x
X X X
X X X X X
3 1 5 3 7
8 2 8 4 8
5
What is the mean amount of rainwater per rain gauge, in inches, in the 10 rain gauges?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.

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