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

B d^2ydx^2=16x^2−9x−12

C d^2ydx^2=48x^2−18x−12

D d^2ydx^2=8x^2−6x−8

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.