| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.98 |
| Score | 0% | 60% |
Convert 1,356,000 to scientific notation.
| 1.356 x 105 | |
| 0.136 x 107 | |
| 1.356 x 106 | |
| 1.356 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:
1,356,000 in scientific notation is 1.356 x 106
| 1 | |
| 3.0 | |
| 7.2 | |
| 2.4 |
1
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 25% off." If Roger buys two shirts, each with a regular price of $42, how much will he pay for both shirts?
| $60.90 | |
| $54.60 | |
| $46.20 | |
| $73.50 |
By buying two shirts, Roger will save $42 x \( \frac{25}{100} \) = \( \frac{$42 x 25}{100} \) = \( \frac{$1050}{100} \) = $10.50 on the second shirt.
So, his total cost will be
$42.00 + ($42.00 - $10.50)
$42.00 + $31.50
$73.50
The __________ is the smallest positive integer that is a multiple of two or more integers.
least common factor |
|
absolute value |
|
least common multiple |
|
greatest common factor |
The least common multiple (LCM) is the smallest positive integer that is a multiple of two or more integers.
What is 2b6 - 8b6?
| -6b6 | |
| 10b12 | |
| 6b6 | |
| -6b-6 |
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:
2b6 - 8b6
(2 - 8)b6
-6b6