(High points) Please solve with explanation.

What is the solution of log2  (3x  -  7)  =  3? 4 5

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

F(x) = 1/x g(x)=x-4 can you evaluate (g*f)(0) ? why or why not?