| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.82 |
| Score | 0% | 76% |
Convert 7,519,000 to scientific notation.
| 0.752 x 107 | |
| 7.519 x 105 | |
| 7.519 x 106 | |
| 75.19 x 105 |
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:
7,519,000 in scientific notation is 7.519 x 106
What is the distance in miles of a trip that takes 9 hours at an average speed of 40 miles per hour?
| 360 miles | |
| 280 miles | |
| 180 miles | |
| 375 miles |
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 distance:
distance = \( \text{speed} \times \text{time} \)
distance = \( 40mph \times 9h \)
360 miles
Frank loaned Christine $1,300 at an annual interest rate of 4%. If no payments are made, what is the total amount owed at the end of the first year?
| $1,404 | |
| $1,378 | |
| $1,365 | |
| $1,352 |
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 $1,300
i = 0.04 x $1,300
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $1,300 + $52How many hours does it take a car to travel 180 miles at an average speed of 30 miles per hour?
| 5 hours | |
| 8 hours | |
| 6 hours | |
| 2 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 = \( \frac{180mi}{30mph} \)
6 hours
Which of the following is not an integer?
-1 |
|
\({1 \over 2}\) |
|
1 |
|
0 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.