| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
If a car travels 405 miles in 9 hours, what is the average speed?
| 70 mph | |
| 25 mph | |
| 45 mph | |
| 65 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)Which of the following statements about exponents is false?
b1 = b |
|
b0 = 1 |
|
all of these are false |
|
b1 = 1 |
A number with an exponent (be) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b1 = b) and a base with an exponent of 0 equals 1 ( (b0 = 1).
Find the average of the following numbers: 13, 9, 14, 8.
| 11 | |
| 15 | |
| 7 | |
| 13 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{13 + 9 + 14 + 8}{4} \) = \( \frac{44}{4} \) = 11
If there were a total of 450 raffle tickets sold and you bought 13 tickets, what's the probability that you'll win the raffle?
| 3% | |
| 14% | |
| 11% | |
| 2% |
You have 13 out of the total of 450 raffle tickets sold so you have a (\( \frac{13}{450} \)) x 100 = \( \frac{13 \times 100}{450} \) = \( \frac{1300}{450} \) = 3% chance to win the raffle.
A triathlon course includes a 200m swim, a 40.5km bike ride, and a 8.1km run. What is the total length of the race course?
| 54.1km | |
| 49.7km | |
| 48.8km | |
| 54.5km |
To add these distances, they must share the same unit so first you need to first convert the swim distance from meters (m) to kilometers (km) before adding it to the bike and run distances which are already in km. To convert 200 meters to kilometers, divide the distance by 1000 to get 0.2km then add the remaining distances:
total distance = swim + bike + run
total distance = 0.2km + 40.5km + 8.1km
total distance = 48.8km