| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.34 |
| Score | 0% | 67% |
If there were a total of 350 raffle tickets sold and you bought 14 tickets, what's the probability that you'll win the raffle?
| 16% | |
| 9% | |
| 11% | |
| 4% |
You have 14 out of the total of 350 raffle tickets sold so you have a (\( \frac{14}{350} \)) x 100 = \( \frac{14 \times 100}{350} \) = \( \frac{1400}{350} \) = 4% chance to win the raffle.
Convert x-2 to remove the negative exponent.
| \( \frac{-1}{-2x} \) | |
| \( \frac{-2}{-x} \) | |
| \( \frac{2}{x} \) | |
| \( \frac{1}{x^2} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
Which of the following is an improper fraction?
\(1 {2 \over 5} \) |
|
\({7 \over 5} \) |
|
\({a \over 5} \) |
|
\({2 \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.
How many hours does it take a car to travel 50 miles at an average speed of 50 miles per hour?
| 1 hour | |
| 7 hours | |
| 4 hours | |
| 3 hours |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)Solving for time:
time = \( \frac{\text{distance}}{\text{speed}} \)
time = \( \frac{50mi}{50mph} \)
1 hour
If the ratio of home fans to visiting fans in a crowd is 5:1 and all 30,000 seats in a stadium are filled, how many home fans are in attendance?
| 25,000 | |
| 37,500 | |
| 24,667 | |
| 33,600 |
A ratio of 5:1 means that there are 5 home fans for every one visiting fan. So, of every 6 fans, 5 are home fans and \( \frac{5}{6} \) of every fan in the stadium is a home fan:
30,000 fans x \( \frac{5}{6} \) = \( \frac{150000}{6} \) = 25,000 fans.