Please help! I will mark as brainliest IF answer is right. <3

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

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that

What is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?