Can someone help pleas
Use GCF and Difference of Two Cubes to factor the following: (3x^3 +24)

(b) Find the x-intercepts and turning point: f(x) = x^2-2x-24
(c) Graph part (b)

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