The answer is 2670.57 and yes im sure this is right i just finished my quiz! (Please make the answer the brainliest!)
To find the percent of error divide how off the wrong answer was by the right number, then multiply by 100.
Bryan's guess of 730 was 120 less than the actual number so you would divide 120 by 850. 120/850 = 0.141
Then we would multiply that by 100. 0.141 * 100 = 14.1
His percent of error was 14.1%. The percent of error is negative since his guess was less than the right answer.
Answer:i have no idea sry
Step-by-step explanation:
1. The amount of money in the account after 10 years is 42,317.96 dollars.
2. it will take Pamela and Kevin 7.5 hours to complete the task together
<h3>How to find compound interest?</h3>
Question(1)
Using compound interest formula,
![A = p(1 + \frac{r}{n} )^{nt}](https://tex.z-dn.net/?f=A%20%3D%20p%281%20%2B%20%5Cfrac%7Br%7D%7Bn%7D%20%29%5E%7Bnt%7D)
where
- p = principal
- r = rate
- n = number of times
- t = time
Therefore,
p = 30,000
r = 3.5% = 0.035
t = 10
n = 1
Therefore,
![A = 30000(1+\frac{0.035}{1} )^{1X10}](https://tex.z-dn.net/?f=A%20%3D%2030000%281%2B%5Cfrac%7B0.035%7D%7B1%7D%20%29%5E%7B1X10%7D)
A = $42,317.96
Question 2:
Pamela takes 12 hours to complete a task.
Kelvin takes 20 hours to complete same task.
The time it will take both of them can be computed as follows:
using rate principle,
let
x = time it will take both of them to do the work together.
![\frac{1}{x}=\frac{1}{12} + \frac{1}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bx%7D%3D%5Cfrac%7B1%7D%7B12%7D%20%2B%20%5Cfrac%7B1%7D%7B20%7D)
![\frac{1}{x}=\frac{20+12}{240}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bx%7D%3D%5Cfrac%7B20%2B12%7D%7B240%7D)
![\frac{1}{x}=\frac{32}{240}](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bx%7D%3D%5Cfrac%7B32%7D%7B240%7D)
cross multiply
240 = 32x
x = 240 / 32
x = 7.5 hours
Therefore, it will take Pamela and Kevin 7.5 hours to complete the task together
learn more on compound interest and rate here: brainly.com/question/18104604
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