Answer:
The correct option is D.
Explanation:
It is given that Christopher took out a 4 year loan for $1150 at a sports-equipment store to be paid back with monthly payments at a 4.2% APR, compounded monthly.
The formula for amount after compound interest is
![A=P(1+(r)/(n))^(t)](https://img.qammunity.org/2020/formulas/mathematics/high-school/4ye2uhqavststu1vxe625uwhtj1tckwsf5.png)
Where, P is principal, r is rate of interest, n is number of time interest compounded in a period, number of periods.
According to the given information,
P=1150
r=0.042
n=12
t=9
Put these values in the above formula,
![A=1150(1+(0.042)/(12))^(9)](https://img.qammunity.org/2020/formulas/mathematics/high-school/tosqj38fjzh468x3h6cgcy4qbc9puksu3i.png)
![A=1186.73631355](https://img.qammunity.org/2020/formulas/mathematics/high-school/4janbw4ll1wb1se9rymv2qko57xgh97zmd.png)
![A\approx 1186.74](https://img.qammunity.org/2020/formulas/mathematics/high-school/tb5n5le460mpu979gbjryz9kfznykxmy4h.png)
Christopher owe $1186.74 when he begins making payments. Therefore the correct option is D.