Derek has $80 to spend on used books.

I think he should probably keep that $80 and use it when he really needs it. Or if he buys the books he can sell them all to get even more money that he has right now.

Hope this was helpful for you. :)

Step-by-step explanation:

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

it’s the first one your welcome