| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.54 |
| Score | 0% | 71% |
The total water usage for a city is 35,000 gallons each day. Of that total, 11% is for personal use and 32% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 4,600 | |
| 1,300 | |
| 7,350 | |
| 2,500 |
32% of the water consumption is industrial use and 11% is personal use so (32% - 11%) = 21% more water is used for industrial purposes. 35,000 gallons are consumed daily so industry consumes \( \frac{21}{100} \) x 35,000 gallons = 7,350 gallons.
What is the greatest common factor of 48 and 48?
| 1 | |
| 48 | |
| 43 | |
| 5 |
The factors of 48 are [1, 2, 3, 4, 6, 8, 12, 16, 24, 48] and the factors of 48 are [1, 2, 3, 4, 6, 8, 12, 16, 24, 48]. They share 10 factors [1, 2, 3, 4, 6, 8, 12, 16, 24, 48] making 48 the greatest factor 48 and 48 have in common.
A factor is a positive __________ that divides evenly into a given number.
integer |
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mixed number |
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fraction |
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improper fraction |
A factor is a positive integer that divides evenly into a given number. For example, the factors of 8 are 1, 2, 4, and 8.
What is \( \frac{3}{8} \) + \( \frac{2}{16} \)?
| \( \frac{8}{11} \) | |
| \(\frac{1}{2}\) | |
| 1 \( \frac{6}{16} \) | |
| 2 \( \frac{4}{9} \) |
To add these fractions, first find the lowest common multiple of their denominators. The first few multiples of 8 are [8, 16, 24, 32, 40, 48, 56, 64, 72, 80] and the first few multiples of 16 are [16, 32, 48, 64, 80, 96]. The first few multiples they share are [16, 32, 48, 64, 80] making 16 the smallest multiple 8 and 16 share.
Next, convert the fractions so each denominator equals the lowest common multiple:
\( \frac{3 x 2}{8 x 2} \) + \( \frac{2 x 1}{16 x 1} \)
\( \frac{6}{16} \) + \( \frac{2}{16} \)
Now, because the fractions share a common denominator, you can add them:
\( \frac{6 + 2}{16} \) = \( \frac{8}{16} \) = \(\frac{1}{2}\)
What is (x2)2?
| x0 | |
| 10 | |
| x4 | |
| 2x2 |
To raise a term with an exponent to another exponent, retain the base and multiply the exponents:
(x2)2