| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.15 |
| Score | 0% | 63% |
Convert 2,227,000 to scientific notation.
| 2.227 x 10-5 | |
| 2.227 x 106 | |
| 2.227 x 105 | |
| 0.223 x 107 |
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:
2,227,000 in scientific notation is 2.227 x 106
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 5% off." If Charlie buys two shirts, each with a regular price of $27, how much money will he save?
| $9.45 | |
| $6.75 | |
| $5.40 | |
| $1.35 |
By buying two shirts, Charlie will save $27 x \( \frac{5}{100} \) = \( \frac{$27 x 5}{100} \) = \( \frac{$135}{100} \) = $1.35 on the second shirt.
| 0.9 | |
| 2.7 | |
| 4.5 | |
| 1 |
1
Which of these numbers is a factor of 64?
| 47 | |
| 64 | |
| 54 | |
| 13 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 64 are 1, 2, 4, 8, 16, 32, 64.
The total water usage for a city is 20,000 gallons each day. Of that total, 27% is for personal use and 51% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 2,700 | |
| 4,800 | |
| 7,500 | |
| 3,750 |
51% of the water consumption is industrial use and 27% is personal use so (51% - 27%) = 24% more water is used for industrial purposes. 20,000 gallons are consumed daily so industry consumes \( \frac{24}{100} \) x 20,000 gallons = 4,800 gallons.