Answer:
100
Step-by-step
all you have to do is add 20+30=50+50=100
volume is all the numbers added up
No solutions you cancel out the ax’s
widest to narrowest: y=3/2x2, y= -1/2x2, y= 1/4x2
The increase is D: 50% because the 1 in the parentheses stands for the 20 that was already there, with the .5 being the amount that’s actually being increased. 0.5 translates to 50%, so the answer is D.