Plz help what is the answer for B
Will mark brainliest if right

What is the product? (x2+3y+7) [yy+1)

Whats the name of the vertical axis

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