It is B. Because the 3$ doesn't have any variables and the 2 dollars is per hours so 2x
24.26 multiply by 37 = 897.62mm (89.762cm)
Answer:
3.9%
Step-by-step explanation:
The formula for compound interest to apply is;

where;
A=amount at the end
P=starting amount/principal
n=number of compounding years
t=total number of years
r=interest rate expressed as a decimal
Given
P=$4200, n=2, t=4 and A=$4900 R=?
Substitute values in equation, take r=r

Divide both sides by 4200

Introduce root 8 to the left hand side, thus eliminating the power 8 in the right hand side
![\sqrt[8]{1.1667} =1+0.5r\\\\\\1.0195=1+0.5r\\\\\\1.0195-1=0.5r\\\\\\0.0195=0.5r\\\\\\\frac{0.0195}{0.5} =\frac{0.5r}{0.5} \\\\\\0.039=r](https://tex.z-dn.net/?f=%5Csqrt%5B8%5D%7B1.1667%7D%20%3D1%2B0.5r%5C%5C%5C%5C%5C%5C1.0195%3D1%2B0.5r%5C%5C%5C%5C%5C%5C1.0195-1%3D0.5r%5C%5C%5C%5C%5C%5C0.0195%3D0.5r%5C%5C%5C%5C%5C%5C%5Cfrac%7B0.0195%7D%7B0.5%7D%20%3D%5Cfrac%7B0.5r%7D%7B0.5%7D%20%5C%5C%5C%5C%5C%5C0.039%3Dr)
r=3.9%
(5 + 3) / (-2 -8) = 8/-10 = -4/5