A^2+b^2=c^2
(2sqrt3)^2+b^2=16
12+b^2=16
solve for b
b=2
Now triangle area is A=1/2 bh
so
A=(1/2)(2)(2sqrt3)
A=2sqrt3
she surveyed "x" amount, which is the 100%, but we also know that 180 is the 37.5%, so

34,600.
7 is higher than 4, so it rounds up.
Y = 2 x + 18 i think thats the answer :D