| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.23 |
| Score | 0% | 65% |
Alex loaned Diane $600 at an annual interest rate of 1%. If no payments are made, what is the total amount owed at the end of the first year?
| $648 | |
| $636 | |
| $606 | |
| $642 |
The yearly interest charged on this loan is the annual interest rate multiplied by the amount borrowed:
interest = annual interest rate x loan amount
i = (\( \frac{6}{100} \)) x $600
i = 0.01 x $600
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $600 + $6What is \( \frac{10\sqrt{27}}{5\sqrt{9}} \)?
| 2 \( \sqrt{3} \) | |
| \(\frac{1}{3}\) \( \sqrt{2} \) | |
| \(\frac{1}{3}\) \( \sqrt{\frac{1}{2}} \) | |
| \(\frac{1}{2}\) \( \sqrt{\frac{1}{3}} \) |
To divide terms with radicals, divide the coefficients and radicands separately:
\( \frac{10\sqrt{27}}{5\sqrt{9}} \)
\( \frac{10}{5} \) \( \sqrt{\frac{27}{9}} \)
2 \( \sqrt{3} \)
\({b + c \over a} = {b \over a} + {c \over a}\) defines which of the following?
commutative property for division |
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commutative property for multiplication |
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distributive property for multiplication |
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distributive property for division |
The distributive property for division helps in solving expressions like \({b + c \over a}\). It specifies that the result of dividing a fraction with multiple terms in the numerator and one term in the denominator can be obtained by dividing each term individually and then totaling the results: \({b + c \over a} = {b \over a} + {c \over a}\). For example, \({a^3 + 6a^2 \over a^2} = {a^3 \over a^2} + {6a^2 \over a^2} = a + 6\).
A machine in a factory has an error rate of 4 parts per 100. The machine normally runs 24 hours a day and produces 10 parts per hour. Yesterday the machine was shut down for 8 hours for maintenance.
How many error-free parts did the machine produce yesterday?
| 142.5 | |
| 133.9 | |
| 140.8 | |
| 153.6 |
The hourly error rate for this machine is the error rate in parts per 100 multiplied by the number of parts produced per hour:
\( \frac{4}{100} \) x 10 = \( \frac{4 \times 10}{100} \) = \( \frac{40}{100} \) = 0.4 errors per hour
So, in an average hour, the machine will produce 10 - 0.4 = 9.6 error free parts.
The machine ran for 24 - 8 = 16 hours yesterday so you would expect that 16 x 9.6 = 153.6 error free parts were produced yesterday.
11 members of a bridal party need transported to a wedding reception but there are only 2 4-passenger taxis available to take them. How many will need to find other transportation?
| 8 | |
| 9 | |
| 3 | |
| 1 |
There are 2 4-passenger taxis available so that's 2 x 4 = 8 total seats. There are 11 people needing transportation leaving 11 - 8 = 3 who will have to find other transportation.