I am looking for the formula of this question: during a 10-day period an athletes average resting heart rate after exercising was 58. The athletes average heart rate during the first four days was 61. What was the average heart rate during the last 6 days ​

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.

The answer is 0 and 1