| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.07 |
| Score | 0% | 61% |
What is (a2)2?
| a4 | |
| 2a2 | |
| 80 | |
| a0 |
To raise a term with an exponent to another exponent, retain the base and multiply the exponents:
(a2)2Cooks are needed to prepare for a large party. Each cook can bake either 4 large cakes or 11 small cakes per hour. The kitchen is available for 4 hours and 26 large cakes and 250 small cakes need to be baked.
How many cooks are required to bake the required number of cakes during the time the kitchen is available?
| 12 | |
| 10 | |
| 8 | |
| 6 |
If a single cook can bake 4 large cakes per hour and the kitchen is available for 4 hours, a single cook can bake 4 x 4 = 16 large cakes during that time. 26 large cakes are needed for the party so \( \frac{26}{16} \) = 1\(\frac{5}{8}\) cooks are needed to bake the required number of large cakes.
If a single cook can bake 11 small cakes per hour and the kitchen is available for 4 hours, a single cook can bake 11 x 4 = 44 small cakes during that time. 250 small cakes are needed for the party so \( \frac{250}{44} \) = 5\(\frac{15}{22}\) cooks are needed to bake the required number of small cakes.
Because you can't employ a fractional cook, round the number of cooks needed for each type of cake up to the next whole number resulting in 2 + 6 = 8 cooks.
Convert x-5 to remove the negative exponent.
| \( \frac{1}{x^{-5}} \) | |
| \( \frac{-1}{x^{-5}} \) | |
| \( \frac{5}{x} \) | |
| \( \frac{1}{x^5} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
What is \( 9 \)\( \sqrt{48} \) - \( 2 \)\( \sqrt{3} \)
| 18\( \sqrt{144} \) | |
| 18\( \sqrt{48} \) | |
| 34\( \sqrt{3} \) | |
| 18\( \sqrt{3} \) |
To subtract these radicals together their radicands must be the same:
9\( \sqrt{48} \) - 2\( \sqrt{3} \)
9\( \sqrt{16 \times 3} \) - 2\( \sqrt{3} \)
9\( \sqrt{4^2 \times 3} \) - 2\( \sqrt{3} \)
(9)(4)\( \sqrt{3} \) - 2\( \sqrt{3} \)
36\( \sqrt{3} \) - 2\( \sqrt{3} \)
Now that the radicands are identical, you can subtract them:
36\( \sqrt{3} \) - 2\( \sqrt{3} \)How many 13-passenger vans will it take to drive all 46 members of the football team to an away game?
| 4 vans | |
| 3 vans | |
| 8 vans | |
| 5 vans |
Calculate the number of vans needed by dividing the number of people that need transported by the capacity of one van:
vans = \( \frac{46}{13} \) = 3\(\frac{7}{13}\)
So, it will take 3 full vans and one partially full van to transport the entire team making a total of 4 vans.