k = 3
Expression A:
Expression B:
How do I do this I don’t understand
2 answers:
9514 1404 393
Answer:
a) 74.5%
b) 84.3%
Step-by-step explanation:
a) If you were to refer to the glossary, as the problem statement suggests, it would tell you how to do this. Add up the scores and divide by the number of them.
Here, the 8 given scores have a total of 596%, so their mean is ...
596%/8 = 74.5%
Brandee might argue that this score <em>does not really represent her abilities</em>, because <em>her abilities were not demonstrated properly</em> on one of the tests.
__
b) Replacing the 0 score with 78% brings the total to 674%, so the new mean is ...
674%/8 = 84.3%
_____
<em>Additional comment</em>
Brandee's teacher might argue that the score <em>does</em> represent Brandee's abilities, because sometimes she fails to perform when needed.
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Answer:
It will take 14.29 years for your bank balance to double from $1,000 to $2,000.
Step-by-step explanation:
This is a simple interest problem.
The simple interest formula is given by:
In which E are the earnings, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.
After t years, the total amount of money is:
.
If the interest rate is 7%, how many years will it take for your bank balance to double from $1,000 to $2,000?
We have that
We want to find t when E = 1000, so .
It will take 14.29 years for your bank balance to double from $1,000 to $2,000.