The answer for this would be $9.20
8666.875
where is your calculator?
A=((40+64)/2)*18= 936 units^2
There is nearly 52 weeks in a year, so 9 x 52 would be 468
2 concerts at 40 each would be 80, so 468+80 would be 548
Valerie spends 548$ a year on music entertainment.