Answer:
A) 25
Step-by-step explanation:
You use x= -b/2a in order to get your maximum so x= -10/ 2(-5) and you get x=1. You plug 1 into the function as h(1)=-5(1)^2 + 10(1)+ 20 which gets you 25
22.75/350=0.065
0.065=6.5%
Sales tax= 6.5%
Um I think it is 2,1 count over 2 then go up1
