| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.07 |
| Score | 0% | 61% |
What is \( \sqrt{\frac{64}{25}} \)?
| 2\(\frac{2}{3}\) | |
| 1\(\frac{3}{4}\) | |
| 1 | |
| 1\(\frac{3}{5}\) |
To take the square root of a fraction, break the fraction into two separate roots then calculate the square root of the numerator and denominator separately:
\( \sqrt{\frac{64}{25}} \)
\( \frac{\sqrt{64}}{\sqrt{25}} \)
\( \frac{\sqrt{8^2}}{\sqrt{5^2}} \)
\( \frac{8}{5} \)
1\(\frac{3}{5}\)
If a mayor is elected with 71% of the votes cast and 73% of a town's 24,000 voters cast a vote, how many votes did the mayor receive?
| 10,687 | |
| 12,439 | |
| 11,563 | |
| 11,213 |
If 73% of the town's 24,000 voters cast ballots the number of votes cast is:
(\( \frac{73}{100} \)) x 24,000 = \( \frac{1,752,000}{100} \) = 17,520
The mayor got 71% of the votes cast which is:
(\( \frac{71}{100} \)) x 17,520 = \( \frac{1,243,920}{100} \) = 12,439 votes.
What is the next number in this sequence: 1, 5, 13, 25, 41, __________ ?
| 69 | |
| 64 | |
| 61 | |
| 54 |
The equation for this sequence is:
an = an-1 + 4(n - 1)
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 4(6 - 1)
a6 = 41 + 4(5)
a6 = 61
The total water usage for a city is 30,000 gallons each day. Of that total, 29% is for personal use and 45% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 4,250 | |
| 11,700 | |
| 11,600 | |
| 4,800 |
45% of the water consumption is industrial use and 29% is personal use so (45% - 29%) = 16% more water is used for industrial purposes. 30,000 gallons are consumed daily so industry consumes \( \frac{16}{100} \) x 30,000 gallons = 4,800 gallons.
What is \( \frac{-7z^5}{3z^2} \)?
| -\(\frac{3}{7}\)z7 | |
| -2\(\frac{1}{3}\)z10 | |
| -2\(\frac{1}{3}\)z3 | |
| -\(\frac{3}{7}\)z3 |
To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:
\( \frac{-7z^5}{3z^2} \)
\( \frac{-7}{3} \) z(5 - 2)
-2\(\frac{1}{3}\)z3