Answer:
$162.50
Step-by-step explanation:
I=Prt
I=(5000)(0.065)(0.5)
I=162.50
0.5 = 6 months, which is half of a year
0.065 = the percent (6.5%) in decimal form
4 is correct. Set up a ratio relationship between similar triangles. 
The degree is highest power in the monomials.
4 = 1
2z = 1
4r^2st^3 = 3
3xyz^2 = 2
18 dollars and 30 cents for 15 golf balls