| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.80 |
| Score | 0% | 76% |
Convert y-2 to remove the negative exponent.
| \( \frac{1}{y^2} \) | |
| \( \frac{-1}{y^{-2}} \) | |
| \( \frac{1}{y^{-2}} \) | |
| \( \frac{-2}{-y} \) |
To convert a negative exponent to a positive exponent, calculate the positive exponent then take the reciprocal.
Monty loaned Alex $400 at an annual interest rate of 2%. If no payments are made, what is the interest owed on this loan at the end of the first year?
| $8 | |
| $104 | |
| $81 | |
| $4 |
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 $400
i = 0.02 x $400
i = $8
What is the next number in this sequence: 1, 7, 13, 19, 25, __________ ?
| 31 | |
| 35 | |
| 29 | |
| 27 |
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
4! = ?
3 x 2 x 1 |
|
5 x 4 x 3 x 2 x 1 |
|
4 x 3 |
|
4 x 3 x 2 x 1 |
A factorial has the form n! and is the product of the integer (n) and all the positive integers below it. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.
Convert 0.0002401 to scientific notation.
| 2.401 x 10-4 | |
| 0.24 x 10-3 | |
| 2.401 x 10-3 | |
| 24.01 x 10-5 |
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:
0.0002401 in scientific notation is 2.401 x 10-4