The answer is B) 1/3.
A rectangular prism has 6 faces. The area of each is given by length * width.
The area of the top and bottom is given by 25(4) = 100 sq. in.
The area of the front and back is given by 25(8) = 200 sq. in.
The area of the right and left is given by 4(8) = 32.
There are only 2 faces that have an area that is not a multiple of 100; 2/6 = 1/3.
Using compound interest, it is found that:
- The equation is:
- After 3 years, he has $4,252 in the account.
- After 10 years, he has $6,608 in the account.
<h3>What is compound interest?</h3>
The amount of money earned, in compound interest, after t years, is given by:
In which:
- A(t) is the amount of money after t years.
- P is the principal(the initial sum of money).
- r is the interest rate(as a decimal value).
- n is the number of times that interest is compounded per year.
- t is the time in years for which the money is invested or borrowed.
In this problem:
- Jack was given $3520 from his grandma, hence P = 3520.
- The account pays 6.5% interest rate that is compounded annually, hence n = 1, r = 0.065.
Hence, the equation is:
After 3 and 10 years, respectively, the amount in dollars in the account are given by:
More can be learned about compound interest at brainly.com/question/25781328
Answer:
.4 and it terminates
Step-by-step explanation:
Given :
Xinran walks 3 mi/h uphill, 4 mi/h on flat land and 5 mi/h downhill.
To Find :
If he walks one mile uphill, then one mile on flat land and then returns by the same route to his starting point, how many minutes does he walk.
Solution :
Time taken to walk one mile uphill is :
Time taken to walk two mile on flat land( one on going and one or returning ) is :
Time taken to walk one mile downhill is :
Total time taken :
Therefore, time taken un 62 minutes.