In the expression, 2y2 + 4x – y + x2 +8, what is the coefficient of x2 ?
A- 8
B- 2
C- 1
D- 4

Select the quadratic that has root x = 8 and x = -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

15/16 as a decimal rounded to the nearest hundredth