Question 3: Find d^2y / dx^2 for y=4x^4−3x^3−6x^2+x A d^2y / dx^2v = 16x^3−9x^2−12x+1

B d^2y / dx^2 = 16x^2−9x−12

C d^2y / dx^2 = 48x^2−18x−12

D d^2y / dx^2 = 8x^2−6x−8

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?

Scores on the cognitive scale of the bayley-scales of infant and toddler development range from 1 to 19, with a standard deviation of 3. calculate the margin of error in estimating the true mean cognitive scale score, with 99% confidence, if there are 12 infants and toddlers in a sample.

Answer 20 points and brainiest ! on the board, your teacher writes an example of how to find the median. one of the numbers is erased, leaving what is shown, 18, 30, 26,12 22. what is the median? a. 10 b. 20 c. 24 d. 28