Answer:
The interest is $189.78
Explanation:
The computation of the interest on January 20 is shown below:
= Principal × interest rate × number of days ÷ total number of days in a year
= $7,000 × 8% × 122 days ÷ 360 days
= $7,000 × 8% × 0.338
= $189.78
The 122 days are calculated below:
September - 10 days
October - 31 days
November - 30 days
December - 31 days
January - 20 days
Total - 122 days
And we assume the 360 days in a year
Answer:
r = 11.5%
Explanation:
Given data:
invested amount $20,000
withrawl amount after 5 year is $5000
Amount at the end of 10th yr is $50,000
present value is given as

where
A - amount after given n year


Let 
squaring on both side




solving for t we get
t = 1.711
so, 
Answer:
B
Explanation:
The marginal cost of producing food is $25, which is greater than the price of selling the food.
At this point the firm is incurring a loss. In order to improve profit margins, the firm should reduce the amount of meals been produced, so that profit would increase