| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
| 0.4 | |
| 1 | |
| 1.2 | |
| 0.9 |
1
What is the next number in this sequence: 1, 5, 13, 25, 41, __________ ?
| 58 | |
| 66 | |
| 53 | |
| 61 |
The equation for this sequence is:
an = an-1 + 4(n - 1)
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 4(6 - 1)
a6 = 41 + 4(5)
a6 = 61
What is 4z3 + 4z3?
| -3 | |
| 8z3 | |
| 8z9 | |
| 3 |
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:
4z3 + 4z3
(4 + 4)z3
8z3
Convert 0.0005989 to scientific notation.
| 5.989 x 10-5 | |
| 5.989 x 10-4 | |
| 0.599 x 10-3 | |
| 5.989 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:
0.0005989 in scientific notation is 5.989 x 10-4
Which of the following is not an integer?
1 |
|
\({1 \over 2}\) |
|
0 |
|
-1 |
An integer is any whole number, including zero. An integer can be either positive or negative. Examples include -77, -1, 0, 55, 119.