| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.79 |
| Score | 0% | 56% |
How many hours does it take a car to travel 270 miles at an average speed of 45 miles per hour?
| 6 hours | |
| 3 hours | |
| 1 hour | |
| 7 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 = \( \frac{270mi}{45mph} \)
6 hours
Which of the following statements about exponents is false?
all of these are false |
|
b1 = b |
|
b1 = 1 |
|
b0 = 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).
What is 7\( \sqrt{6} \) x 6\( \sqrt{9} \)?
| 42\( \sqrt{15} \) | |
| 42\( \sqrt{6} \) | |
| 126\( \sqrt{6} \) | |
| 13\( \sqrt{54} \) |
To multiply terms with radicals, multiply the coefficients and radicands separately:
7\( \sqrt{6} \) x 6\( \sqrt{9} \)
(7 x 6)\( \sqrt{6 \times 9} \)
42\( \sqrt{54} \)
Now we need to simplify the radical:
42\( \sqrt{54} \)
42\( \sqrt{6 \times 9} \)
42\( \sqrt{6 \times 3^2} \)
(42)(3)\( \sqrt{6} \)
126\( \sqrt{6} \)
A tiger in a zoo has consumed 72 pounds of food in 9 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 104 pounds?
| 2 | |
| 4 | |
| 3 | |
| 11 |
If the tiger has consumed 72 pounds of food in 9 days that's \( \frac{72}{9} \) = 8 pounds of food per day. The tiger needs to consume 104 - 72 = 32 more pounds of food to reach 104 pounds total. At 8 pounds of food per day that's \( \frac{32}{8} \) = 4 more days.
| 0.5 | |
| 1 | |
| 5.0 | |
| 1.8 |
1