| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.55 |
| Score | 0% | 71% |
Which of the following is not a prime number?
5 |
|
9 |
|
7 |
|
2 |
A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.
What is \( \sqrt{\frac{25}{49}} \)?
| 2 | |
| 1\(\frac{1}{5}\) | |
| \(\frac{5}{7}\) | |
| 1\(\frac{1}{3}\) |
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:
\( \sqrt{\frac{25}{49}} \)
\( \frac{\sqrt{25}}{\sqrt{49}} \)
\( \frac{\sqrt{5^2}}{\sqrt{7^2}} \)
\(\frac{5}{7}\)
If there were a total of 150 raffle tickets sold and you bought 9 tickets, what's the probability that you'll win the raffle?
| 17% | |
| 5% | |
| 4% | |
| 6% |
You have 9 out of the total of 150 raffle tickets sold so you have a (\( \frac{9}{150} \)) x 100 = \( \frac{9 \times 100}{150} \) = \( \frac{900}{150} \) = 6% chance to win the raffle.
If a car travels 390 miles in 6 hours, what is the average speed?
| 30 mph | |
| 65 mph | |
| 55 mph | |
| 50 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)What is -7b5 x 4b5?
| -28b10 | |
| -28b5 | |
| -28b25 | |
| -3b5 |
To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:
-7b5 x 4b5
(-7 x 4)b(5 + 5)
-28b10