| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.58 |
| Score | 0% | 72% |
If a car travels 90 miles in 6 hours, what is the average speed?
| 15 mph | |
| 35 mph | |
| 40 mph | |
| 25 mph |
Average speed in miles per hour is the number of miles traveled divided by the number of hours:
speed = \( \frac{\text{distance}}{\text{time}} \)How many 6-passenger vans will it take to drive all 57 members of the football team to an away game?
| 6 vans | |
| 10 vans | |
| 4 vans | |
| 9 vans |
Calculate the number of vans needed by dividing the number of people that need transported by the capacity of one van:
vans = \( \frac{57}{6} \) = 9\(\frac{1}{2}\)
So, it will take 9 full vans and one partially full van to transport the entire team making a total of 10 vans.
Which of these numbers is a factor of 40?
| 8 | |
| 38 | |
| 23 | |
| 6 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 40 are 1, 2, 4, 5, 8, 10, 20, 40.
Convert 0.0009431 to scientific notation.
| 94.31 x 10-5 | |
| 9.431 x 10-3 | |
| 9.431 x 10-4 | |
| 0.943 x 10-3 |
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:
0.0009431 in scientific notation is 9.431 x 10-4
A bread recipe calls for 2\(\frac{1}{4}\) cups of flour. If you only have \(\frac{1}{8}\) cup, how much more flour is needed?
| 2\(\frac{1}{8}\) cups | |
| 2\(\frac{3}{4}\) cups | |
| 1\(\frac{1}{2}\) cups | |
| \(\frac{1}{4}\) cups |
The amount of flour you need is (2\(\frac{1}{4}\) - \(\frac{1}{8}\)) cups. Rewrite the quantities so they share a common denominator and subtract:
(\( \frac{18}{8} \) - \( \frac{1}{8} \)) cups
\( \frac{17}{8} \) cups
2\(\frac{1}{8}\) cups