Number patterns, rule: add 15, subtract 10. first term: 4

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

Write the equation in logarithmic form m^x=n

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