HELP I WILL GIVE BRAINLIEST

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

Bring the fraction a/a-4 to a denominator of 16-a^2

Which strategy is used by public health to reduce the incidence of food poisoning?