| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
Jennifer scored 79% on her final exam. If each question was worth 3 points and there were 240 possible points on the exam, how many questions did Jennifer answer correctly?
| 65 | |
| 63 | |
| 60 | |
| 75 |
Jennifer scored 79% on the test meaning she earned 79% of the possible points on the test. There were 240 possible points on the test so she earned 240 x 0.79 = 189 points. Each question is worth 3 points so she got \( \frac{189}{3} \) = 63 questions right.
Which of these numbers is a factor of 48?
| 42 | |
| 45 | |
| 2 | |
| 27 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 48 are 1, 2, 3, 4, 6, 8, 12, 16, 24, 48.
What is the least common multiple of 6 and 12?
| 68 | |
| 44 | |
| 12 | |
| 69 |
The first few multiples of 6 are [6, 12, 18, 24, 30, 36, 42, 48, 54, 60] and the first few multiples of 12 are [12, 24, 36, 48, 60, 72, 84, 96]. The first few multiples they share are [12, 24, 36, 48, 60] making 12 the smallest multiple 6 and 12 have in common.
Which of the following is not a prime number?
9 |
|
5 |
|
7 |
|
2 |
A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.
Convert a-4 to remove the negative exponent.
| \( \frac{1}{a^4} \) | |
| \( \frac{-4}{-a} \) | |
| \( \frac{1}{a^{-4}} \) | |
| \( \frac{-1}{-4a^{4}} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.