| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.17 |
| Score | 0% | 63% |
The total water usage for a city is 15,000 gallons each day. Of that total, 29% is for personal use and 60% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 1,400 | |
| 4,650 | |
| 600 | |
| 2,500 |
60% of the water consumption is industrial use and 29% is personal use so (60% - 29%) = 31% more water is used for industrial purposes. 15,000 gallons are consumed daily so industry consumes \( \frac{31}{100} \) x 15,000 gallons = 4,650 gallons.
Simplify \( \frac{32}{44} \).
| \( \frac{8}{15} \) | |
| \( \frac{5}{12} \) | |
| \( \frac{10}{17} \) | |
| \( \frac{8}{11} \) |
To simplify this fraction, first find the greatest common factor between them. The factors of 32 are [1, 2, 4, 8, 16, 32] and the factors of 44 are [1, 2, 4, 11, 22, 44]. They share 3 factors [1, 2, 4] making 4 their greatest common factor (GCF).
Next, divide both numerator and denominator by the GCF:
\( \frac{32}{44} \) = \( \frac{\frac{32}{4}}{\frac{44}{4}} \) = \( \frac{8}{11} \)
Solve for \( \frac{2!}{5!} \)
| \( \frac{1}{60480} \) | |
| \( \frac{1}{9} \) | |
| \( \frac{1}{60} \) | |
| 20 |
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:
\( \frac{2!}{5!} \)
\( \frac{2 \times 1}{5 \times 4 \times 3 \times 2 \times 1} \)
\( \frac{1}{5 \times 4 \times 3} \)
\( \frac{1}{60} \)
What is 8\( \sqrt{8} \) x 3\( \sqrt{3} \)?
| 11\( \sqrt{24} \) | |
| 24\( \sqrt{8} \) | |
| 11\( \sqrt{3} \) | |
| 48\( \sqrt{6} \) |
To multiply terms with radicals, multiply the coefficients and radicands separately:
8\( \sqrt{8} \) x 3\( \sqrt{3} \)
(8 x 3)\( \sqrt{8 \times 3} \)
24\( \sqrt{24} \)
Now we need to simplify the radical:
24\( \sqrt{24} \)
24\( \sqrt{6 \times 4} \)
24\( \sqrt{6 \times 2^2} \)
(24)(2)\( \sqrt{6} \)
48\( \sqrt{6} \)
What is \( \frac{2}{6} \) x \( \frac{2}{8} \)?
| \(\frac{1}{12}\) | |
| \(\frac{1}{24}\) | |
| \(\frac{2}{3}\) | |
| \(\frac{1}{2}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{2}{6} \) x \( \frac{2}{8} \) = \( \frac{2 x 2}{6 x 8} \) = \( \frac{4}{48} \) = \(\frac{1}{12}\)