| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.57 |
| Score | 0% | 71% |
Find the average of the following numbers: 14, 12, 15, 11.
| 17 | |
| 18 | |
| 9 | |
| 13 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{14 + 12 + 15 + 11}{4} \) = \( \frac{52}{4} \) = 13
Convert 453,000 to scientific notation.
| 4.53 x 105 | |
| 4.53 x 104 | |
| 4.53 x 10-4 | |
| 4.53 x 10-5 |
A number in scientific notation has the format 0.000 x 10exponent. To convert to scientific notation, move the decimal point to the right or the left until the number is a decimal between 1 and 10. The exponent of the 10 is the number of places you moved the decimal point and is positive if you moved the decimal point to the left and negative if you moved it to the right:
453,000 in scientific notation is 4.53 x 105
If a car travels 60 miles in 1 hour, what is the average speed?
| 65 mph | |
| 40 mph | |
| 60 mph | |
| 30 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)A triathlon course includes a 400m swim, a 50.4km bike ride, and a 11.9km run. What is the total length of the race course?
| 65.4km | |
| 31.2km | |
| 34.8km | |
| 62.7km |
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 400 meters to kilometers, divide the distance by 1000 to get 0.4km then add the remaining distances:
total distance = swim + bike + run
total distance = 0.4km + 50.4km + 11.9km
total distance = 62.7km
The __________ is the greatest factor that divides two integers.
least common multiple |
|
greatest common factor |
|
absolute value |
|
greatest common multiple |
The greatest common factor (GCF) is the greatest factor that divides two integers.