| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.46 |
| Score | 0% | 69% |
The total water usage for a city is 20,000 gallons each day. Of that total, 13% is for personal use and 42% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 4,350 | |
| 9,450 | |
| 8,050 | |
| 5,800 |
42% of the water consumption is industrial use and 13% is personal use so (42% - 13%) = 29% more water is used for industrial purposes. 20,000 gallons are consumed daily so industry consumes \( \frac{29}{100} \) x 20,000 gallons = 5,800 gallons.
Alex loaned Charlie $1,500 at an annual interest rate of 1%. If no payments are made, what is the interest owed on this loan at the end of the first year?
| $15 | |
| $45 | |
| $60 | |
| $108 |
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 $1,500
i = 0.01 x $1,500
i = $15
What is 9a4 + 2a4?
| -7a4 | |
| 11a-8 | |
| 11a4 | |
| 11a8 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so add the coefficients and retain the base and exponent:
9a4 + 2a4
(9 + 2)a4
11a4
Which of the following is not an integer?
1 |
|
-1 |
|
0 |
|
\({1 \over 2}\) |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
What is \( \sqrt{\frac{4}{4}} \)?
| \(\frac{1}{2}\) | |
| 1 | |
| 2 | |
| \(\frac{2}{7}\) |
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:
\( \sqrt{\frac{4}{4}} \)
\( \frac{\sqrt{4}}{\sqrt{4}} \)
\( \frac{\sqrt{2^2}}{\sqrt{2^2}} \)
1