Answer:
a
Step-by-step explanation:
Is the dollar signs supp to be there?
<span>An actor invested some money at 9% simple interest, and $42,000 more than three times the amount at 12% per annum. </span><span>What we are after is amounts of interest invested at 9% and at 12%. Let's call them x and y respectively.
x=42000 at 9% = </span>$3,780.00 = $45,780.00
y=3x42000 at 12% = $15,120.00 = $141,120.00
x+y=$186,900.00
this can be solved using
the fomula of the volume of a right circular cylinder
V = pi*r^2*h
Where pi = 3.1416
R is the radius
H is the height
V = 3.1416(1.68^2) (5)
V = 44.3342 ft^3 (7.5
gallon / 1 ft^3)
<span>V = 332.5062 gallons</span>
