| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.27 |
| Score | 0% | 65% |
Monty loaned Christine $600 at an annual interest rate of 6%. If no payments are made, what is the total amount owed at the end of the first year?
| $648 | |
| $630 | |
| $636 | |
| $606 |
The yearly interest charged on this loan is the annual interest rate multiplied by the amount borrowed:
interest = annual interest rate x loan amount
i = (\( \frac{6}{100} \)) x $600
i = 0.06 x $600
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $600 + $36How many hours does it take a car to travel 80 miles at an average speed of 20 miles per hour?
| 2 hours | |
| 1 hour | |
| 4 hours | |
| 5 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 = \( \frac{80mi}{20mph} \)
4 hours
Cooks are needed to prepare for a large party. Each cook can bake either 2 large cakes or 10 small cakes per hour. The kitchen is available for 4 hours and 27 large cakes and 410 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?
| 13 | |
| 15 | |
| 6 | |
| 11 |
If a single cook can bake 2 large cakes per hour and the kitchen is available for 4 hours, a single cook can bake 2 x 4 = 8 large cakes during that time. 27 large cakes are needed for the party so \( \frac{27}{8} \) = 3\(\frac{3}{8}\) cooks are needed to bake the required number of large cakes.
If a single cook can bake 10 small cakes per hour and the kitchen is available for 4 hours, a single cook can bake 10 x 4 = 40 small cakes during that time. 410 small cakes are needed for the party so \( \frac{410}{40} \) = 10\(\frac{1}{4}\) 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 4 + 11 = 15 cooks.
What is the next number in this sequence: 1, 7, 13, 19, 25, __________ ?
| 38 | |
| 22 | |
| 31 | |
| 26 |
The equation for this sequence is:
an = an-1 + 6
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 6
a6 = 25 + 6
a6 = 31
What is \( 3 \)\( \sqrt{32} \) - \( 9 \)\( \sqrt{2} \)
| 3\( \sqrt{2} \) | |
| -6\( \sqrt{-12} \) | |
| 27\( \sqrt{32} \) | |
| -6\( \sqrt{64} \) |
To subtract these radicals together their radicands must be the same:
3\( \sqrt{32} \) - 9\( \sqrt{2} \)
3\( \sqrt{16 \times 2} \) - 9\( \sqrt{2} \)
3\( \sqrt{4^2 \times 2} \) - 9\( \sqrt{2} \)
(3)(4)\( \sqrt{2} \) - 9\( \sqrt{2} \)
12\( \sqrt{2} \) - 9\( \sqrt{2} \)
Now that the radicands are identical, you can subtract them:
12\( \sqrt{2} \) - 9\( \sqrt{2} \)