| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.89 |
| Score | 0% | 58% |
The total water usage for a city is 5,000 gallons each day. Of that total, 27% is for personal use and 54% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 1,350 | |
| 10,200 | |
| 1,550 | |
| 6,300 |
54% of the water consumption is industrial use and 27% is personal use so (54% - 27%) = 27% more water is used for industrial purposes. 5,000 gallons are consumed daily so industry consumes \( \frac{27}{100} \) x 5,000 gallons = 1,350 gallons.
On average, the center for a basketball team hits 50% of his shots while a guard on the same team hits 60% of his shots. If the guard takes 20 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?
| 34 | |
| 24 | |
| 22 | |
| 50 |
guard shots made = shots taken x \( \frac{\text{% made}}{100} \) = 20 x \( \frac{60}{100} \) = \( \frac{60 x 20}{100} \) = \( \frac{1200}{100} \) = 12 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 = \( \frac{12}{\frac{50}{100}} \) = 12 x \( \frac{100}{50} \) = \( \frac{12 x 100}{50} \) = \( \frac{1200}{50} \) = 24 shots
to make the same number of shots as the guard and thus score the same number of points.
What is 6\( \sqrt{2} \) x 2\( \sqrt{3} \)?
| 12\( \sqrt{5} \) | |
| 12\( \sqrt{3} \) | |
| 8\( \sqrt{6} \) | |
| 12\( \sqrt{6} \) |
To multiply terms with radicals, multiply the coefficients and radicands separately:
6\( \sqrt{2} \) x 2\( \sqrt{3} \)
(6 x 2)\( \sqrt{2 \times 3} \)
12\( \sqrt{6} \)
What is the greatest common factor of 64 and 28?
| 13 | |
| 26 | |
| 9 | |
| 4 |
The factors of 64 are [1, 2, 4, 8, 16, 32, 64] and the factors of 28 are [1, 2, 4, 7, 14, 28]. They share 3 factors [1, 2, 4] making 4 the greatest factor 64 and 28 have in common.
The __________ is the greatest factor that divides two integers.
greatest common multiple |
|
absolute value |
|
greatest common factor |
|
least common multiple |
The greatest common factor (GCF) is the greatest factor that divides two integers.