| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.26 |
| Score | 0% | 65% |
What is 8z4 + 2z4?
| 10z16 | |
| 10z-8 | |
| 10z4 | |
| 10z8 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so add the coefficients and retain the base and exponent:
8z4 + 2z4
(8 + 2)z4
10z4
Frank loaned Charlie $900 at an annual interest rate of 9%. If no payments are made, what is the interest owed on this loan at the end of the first year?
| $60 | |
| $81 | |
| $12 | |
| $49 |
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 $900
i = 0.09 x $900
i = $81
Convert 0.0002082 to scientific notation.
| 2.082 x 104 | |
| 0.208 x 10-3 | |
| 2.082 x 105 | |
| 2.082 x 10-4 |
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:
0.0002082 in scientific notation is 2.082 x 10-4
What is -2c7 - 9c7?
| -11c-7 | |
| 11c7 | |
| 11c-7 | |
| -11c7 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:
-2c7 - 9c7
(-2 - 9)c7
-11c7
The __________ is the smallest positive integer that is a multiple of two or more integers.
greatest common factor |
|
least common multiple |
|
absolute value |
|
least common factor |
The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.