| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.70 |
| Score | 0% | 74% |
Which of the following is not an integer?
0 |
|
\({1 \over 2}\) |
|
-1 |
|
1 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.
Convert 7,567,000 to scientific notation.
| 7.567 x 106 | |
| 0.757 x 107 | |
| 7.567 x 10-5 | |
| 7.567 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:
7,567,000 in scientific notation is 7.567 x 106
What is -2a7 x 8a2?
| 6a7 | |
| 6a2 | |
| -16a9 | |
| -16a2 |
To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:
-2a7 x 8a2
(-2 x 8)a(7 + 2)
-16a9
Frank loaned Ezra $800 at an annual interest rate of 4%. If no payments are made, what is the interest owed on this loan at the end of the first year?
| $12 | |
| $32 | |
| $30 | |
| $42 |
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 $800
i = 0.04 x $800
i = $32
How many 8-passenger vans will it take to drive all 61 members of the football team to an away game?
| 8 vans | |
| 6 vans | |
| 13 vans | |
| 7 vans |
Calculate the number of vans needed by dividing the number of people that need transported by the capacity of one van:
vans = \( \frac{61}{8} \) = 7\(\frac{5}{8}\)
So, it will take 7 full vans and one partially full van to transport the entire team making a total of 8 vans.