| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.49 |
| Score | 0% | 70% |
Simplify \( \frac{28}{44} \).
| \( \frac{1}{2} \) | |
| \( \frac{5}{17} \) | |
| \( \frac{7}{11} \) | |
| \( \frac{6}{19} \) |
To simplify this fraction, first find the greatest common factor between them. The factors of 28 are [1, 2, 4, 7, 14, 28] and the factors of 44 are [1, 2, 4, 11, 22, 44]. They share 3 factors [1, 2, 4] making 4 their greatest common factor (GCF).
Next, divide both numerator and denominator by the GCF:
\( \frac{28}{44} \) = \( \frac{\frac{28}{4}}{\frac{44}{4}} \) = \( \frac{7}{11} \)
What is the distance in miles of a trip that takes 2 hours at an average speed of 50 miles per hour?
| 225 miles | |
| 100 miles | |
| 40 miles | |
| 525 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 = \( 50mph \times 2h \)
100 miles
Convert 9,535,000 to scientific notation.
| 9.535 x 10-5 | |
| 9.535 x 106 | |
| 9.535 x 10-6 | |
| 9.535 x 105 |
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:
9,535,000 in scientific notation is 9.535 x 106
If \(\left|a\right| = 7\), which of the following best describes a?
a = 7 or a = -7 |
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none of these is correct |
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a = -7 |
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a = 7 |
The absolute value is the positive magnitude of a particular number or variable and is indicated by two vertical lines: \(\left|-5\right| = 5\). In the case of a variable absolute value (\(\left|a\right| = 5\)) the value of a can be either positive or negative (a = -5 or a = 5).
A tiger in a zoo has consumed 30 pounds of food in 2 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 135 pounds?
| 8 | |
| 7 | |
| 3 | |
| 2 |
If the tiger has consumed 30 pounds of food in 2 days that's \( \frac{30}{2} \) = 15 pounds of food per day. The tiger needs to consume 135 - 30 = 105 more pounds of food to reach 135 pounds total. At 15 pounds of food per day that's \( \frac{105}{15} \) = 7 more days.