Ok so to start you can go ahead and multiple $4.50 by 6 because she is buying 6 books.
4.5*6 = 27
So subtract 27 from 39
39-27=12
Divide 12 by .25
12/.25 = 48
Now divide 48 pieces amount her 6 friends
48/6 =8
8 pieces for each of her friends
Answer:
36
Step-by-step explanation:20 minutes divided by 5 pieces equals 4 minutes per piece. 9 x 4 equals 36
The interest rate will be equal to 24% in 2 years.
<h3>What is compound interest?</h3>
Compound interest is the interest levied on the interest. The formula for the calculation of compound interest is given as:-
Given that:-
- Find the interest rate if $32 increased to $50 in 2 years.
The interest rate will be calculated by using the following formula:-
![A = P[1+\dfrac{r}{n}]^{nt}](https://tex.z-dn.net/?f=A%20%3D%20P%5B1%2B%5Cdfrac%7Br%7D%7Bn%7D%5D%5E%7Bnt%7D)
![50=32[1+\dfrac{r}{1}]^{2}](https://tex.z-dn.net/?f=50%3D32%5B1%2B%5Cdfrac%7Br%7D%7B1%7D%5D%5E%7B2%7D)
![\dfrac{50}{32}=(1+r)^2](https://tex.z-dn.net/?f=%5Cdfrac%7B50%7D%7B32%7D%3D%281%2Br%29%5E2)
1.56 = ( 1 + r )²
√1.56 = ( 1 + r )
r = 1.24 - 1
r = 0.24
r = 24%
Therefore interest rate will be equal to 24% in 2 years.
To know more about Compound interest follow
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