A CERTAIN ZOO CHARGES EXACTLY TWICE ASMUCH FOR AN ADULT ADMISSION T...

8. A certain zoo charges exactly twice as

much for an adult admission ticket

as for a child’s admission ticket. If

the total admission price for the

family of two adults and two children

is $12.60, what is the price of a

Three carpet pieces—in the shapes of

child’s ticket?

a square, a triangle, and a semi-

circle—are attached to one another,

(A)

$1.60

as shown in the figure above, to

(B)

$2.10

cover the floor of a room. If the area

(C)

$3.20

of the square is 144 feet and the

(D) $3.30

perimeter of the triangle is 28 feet,

(E)

$4.20

what is the perimeter of the room’s