Raymond borrowed $3,000.00 from Loans R Us Company. The line of credit agreement provided for repayment of the loan in equal monthly payments of $668.76 which includes interest of 9.00 % per annum calculated on the unpaid balance.
a. What is the monthly rate of interest?
b. Calculate the outstanding loan balance at the end of the third payment
c. What are the total interest charges?
d. How many payments are required to pay off the loan
e. What is the final Payment
Answers
Answer:
EXPLANATION:-
Using the formula first let's calculate the distance of the image from lens using:-
\begin{lgathered}\sf\bold{m=\frac{v}{u}}\\\\>-\frac{1}{2}=\frac{v}{-20}\\\\>v=10\;cm\end{lgathered}
m=
u
v
>−
2
1
=
−20
v
>v=10cm
Now using the formula let's calculate the distance of image from lens:-
\begin{lgathered}\sf\bold{\frac{1}{v}-\frac{1}{u}=\frac{1}{f}}\\\\>\frac{1}{10}-\frac{1}{-20}=\frac{1}{f}\\\\>\frac{1}{10}+\frac{1}{20}=\frac{1}{f}\\\\>\frac{3}{20}=\frac{1}{f}\\\\>f=\frac{20}{3}\end{lgathered}
v
1
−
u
1
=
f
1
>
10
1
−
−20
1
=
f
1
>
10
1
+
20
1
=
f
1
>
20
3
=
f
1
>f=
3
20
Relationship between power and focal length of the lens ,when focal length is in 'cm' :-
\begin{lgathered}\sf\bold{p=\frac{100}{f}}\\\\p=\frac{100}{6.67}\\\\p=14.99\;D\end{lgathered}
p=
f
100
p=
6.67
100
p=14.99D
or
p≈15 D