| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.03 |
| Score | 0% | 61% |
On average, the center for a basketball team hits 50% of his shots while a guard on the same team hits 65% of his shots. If the guard takes 30 shots during a game, how many shots will the center have to take to score as many points as the guard assuming each shot is worth the same number of points?
| 33 | |
| 38 | |
| 59 | |
| 36 |
guard shots made = shots taken x \( \frac{\text{% made}}{100} \) = 30 x \( \frac{65}{100} \) = \( \frac{65 x 30}{100} \) = \( \frac{1950}{100} \) = 19 shots
The center makes 50% of his shots so he'll have to take:
shots made = shots taken x \( \frac{\text{% made}}{100} \)
shots taken = \( \frac{\text{shots taken}}{\frac{\text{% made}}{100}} \)
to make as many shots as the guard. Plugging in values for the center gives us:
center shots taken = \( \frac{19}{\frac{50}{100}} \) = 19 x \( \frac{100}{50} \) = \( \frac{19 x 100}{50} \) = \( \frac{1900}{50} \) = 38 shots
to make the same number of shots as the guard and thus score the same number of points.
Damon loaned Jennifer $1,400 at an annual interest rate of 3%. If no payments are made, what is the total amount owed at the end of the first year?
| $1,442 | |
| $1,484 | |
| $1,456 | |
| $1,512 |
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 $1,400
i = 0.03 x $1,400
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $1,400 + $42Solve for \( \frac{4!}{5!} \)
| 60480 | |
| 6720 | |
| 504 | |
| \( \frac{1}{5} \) |
A factorial is the product of an integer and all the positive integers below it. To solve a fraction featuring factorials, expand the factorials and cancel out like numbers:
\( \frac{4!}{5!} \)
\( \frac{4 \times 3 \times 2 \times 1}{5 \times 4 \times 3 \times 2 \times 1} \)
\( \frac{1}{5} \)
\( \frac{1}{5} \)
A machine in a factory has an error rate of 7 parts per 100. The machine normally runs 24 hours a day and produces 6 parts per hour. Yesterday the machine was shut down for 9 hours for maintenance.
How many error-free parts did the machine produce yesterday?
| 213.4 | |
| 83.7 | |
| 116.4 | |
| 99.4 |
The hourly error rate for this machine is the error rate in parts per 100 multiplied by the number of parts produced per hour:
\( \frac{7}{100} \) x 6 = \( \frac{7 \times 6}{100} \) = \( \frac{42}{100} \) = 0.42 errors per hour
So, in an average hour, the machine will produce 6 - 0.42 = 5.58 error free parts.
The machine ran for 24 - 9 = 15 hours yesterday so you would expect that 15 x 5.58 = 83.7 error free parts were produced yesterday.
What is \( \frac{4}{6} \) x \( \frac{2}{6} \)?
| \(\frac{4}{27}\) | |
| \(\frac{2}{9}\) | |
| 1\(\frac{1}{3}\) | |
| \(\frac{1}{7}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{4}{6} \) x \( \frac{2}{6} \) = \( \frac{4 x 2}{6 x 6} \) = \( \frac{8}{36} \) = \(\frac{2}{9}\)