| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.96 |
| Score | 0% | 79% |
What is the distance in miles of a trip that takes 8 hours at an average speed of 50 miles per hour?
| 400 miles | |
| 125 miles | |
| 270 miles | |
| 495 miles |
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 distance:
distance = \( \text{speed} \times \text{time} \)
distance = \( 50mph \times 8h \)
400 miles
Convert b-4 to remove the negative exponent.
| \( \frac{4}{b} \) | |
| \( \frac{-1}{-4b^{4}} \) | |
| \( \frac{1}{b^4} \) | |
| \( \frac{-1}{-4b} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
Which of the following is not an integer?
-1 |
|
\({1 \over 2}\) |
|
0 |
|
1 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
If a car travels 225 miles in 3 hours, what is the average speed?
| 75 mph | |
| 70 mph | |
| 60 mph | |
| 55 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 (y3)4?
| y12 | |
| 4y3 | |
| y | |
| y-1 |
To raise a term with an exponent to another exponent, retain the base and multiply the exponents:
(y3)4