find the range of values for x write your answer as a decimal rounded to the nearest tenths 74 10x-4 43 74 and 10x-4 are the sides

Fast phone couldn’t copy and paste so i decided to right it down

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population,find the population standard deviation, o.79828588912497