Given Principal $11,000, Interest Rate 128, Time 240 days (use ordinary interest) Partial payments: On 100th day, $4,600
On 180th day, $2,800
a. Use the U. S. Rule to solve for total interest cost. (Use 360 days a year. Do not round Intermediate calculations.
Round your answer to the nearest cent.)
Total interest cost
b. Use the U. S. Rule to solve for balances. (Use 360 days a year. Do not round intermediate calculations. Round your
answers to the nearest cent.)
On 100th day
On 180th day
Balance after the payment

hi there!

the answer to this question is d: 35

step-by-step explanation:

5 to the power of 2 is 25

2 multiplied by 5 is 10

then you add the 2 numbers and you get 35

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

explanation:

remove parenthesis:

=

apply rule

=

multiply fractions:

=

=

divide:

=

mordancy.