#### Answer

a. $C=150+5(t)$ for $t\gt 100$
b. 1650 dollars
c. 270 T-shirts
d. 5.50 dollars

#### Work Step by Step

a. C=cost, t= # of T-shirts
$C=150+5(t)$ for $t\gt 100$
b. t=300
$C=150+5(300)$
$C=150+1500$
$C=1650$
c. C=1500
$1500=150+5(t)$
$1500-150=5(t)$
$1350=5(t)$
$1350\div5=t$
$t=270$
d. P=0, R=revenue, C=1650, x=Price of each t-shirt
$P=R-C$
$0=300(x)-1650$
$0+1650=300(x)$
$1650=300(x)$
$1650\div300=x$
$x=5.5$