| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.12 |
| Score | 0% | 62% |
The total water usage for a city is 25,000 gallons each day. Of that total, 19% is for personal use and 34% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 3,750 | |
| 11,200 | |
| 1,050 | |
| 3,850 |
34% of the water consumption is industrial use and 19% is personal use so (34% - 19%) = 15% more water is used for industrial purposes. 25,000 gallons are consumed daily so industry consumes \( \frac{15}{100} \) x 25,000 gallons = 3,750 gallons.
What is \( \frac{4}{5} \) ÷ \( \frac{2}{6} \)?
| \(\frac{1}{54}\) | |
| \(\frac{1}{21}\) | |
| \(\frac{2}{81}\) | |
| 2\(\frac{2}{5}\) |
To divide fractions, invert the second fraction and then multiply:
\( \frac{4}{5} \) ÷ \( \frac{2}{6} \) = \( \frac{4}{5} \) x \( \frac{6}{2} \)
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{4}{5} \) x \( \frac{6}{2} \) = \( \frac{4 x 6}{5 x 2} \) = \( \frac{24}{10} \) = 2\(\frac{2}{5}\)
Bob loaned Damon $600 at an annual interest rate of 5%. If no payments are made, what is the interest owed on this loan at the end of the first year?
| $4 | |
| $30 | |
| $120 | |
| $24 |
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 $600
i = 0.05 x $600
i = $30
What is \( \frac{3b^5}{7b^2} \)?
| \(\frac{3}{7}\)b3 | |
| 2\(\frac{1}{3}\)b7 | |
| \(\frac{3}{7}\)b7 | |
| 2\(\frac{1}{3}\)b-3 |
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:
\( \frac{3b^5}{7b^2} \)
\( \frac{3}{7} \) b(5 - 2)
\(\frac{3}{7}\)b3
How many 1 gallon cans worth of fuel would you need to pour into an empty 6 gallon tank to fill it exactly halfway?
| 2 | |
| 6 | |
| 3 | |
| 8 |
To fill a 6 gallon tank exactly halfway you'll need 3 gallons of fuel. Each fuel can holds 1 gallons so:
cans = \( \frac{3 \text{ gallons}}{1 \text{ gallons}} \) = 3