| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.90 |
| Score | 0% | 58% |
What is \( \sqrt{\frac{36}{4}} \)?
| 2 | |
| 1 | |
| 3 | |
| \(\frac{6}{7}\) |
To take the square root of a fraction, break the fraction into two separate roots then calculate the square root of the numerator and denominator separately:
\( \sqrt{\frac{36}{4}} \)
\( \frac{\sqrt{36}}{\sqrt{4}} \)
\( \frac{\sqrt{6^2}}{\sqrt{2^2}} \)
\( \frac{6}{2} \)
3
The total water usage for a city is 35,000 gallons each day. Of that total, 28% is for personal use and 62% is for industrial use. How many more gallons of water each day is consumed for industrial use over personal use?
| 8,400 | |
| 9,450 | |
| 5,000 | |
| 11,900 |
62% of the water consumption is industrial use and 28% is personal use so (62% - 28%) = 34% more water is used for industrial purposes. 35,000 gallons are consumed daily so industry consumes \( \frac{34}{100} \) x 35,000 gallons = 11,900 gallons.
Which of the following statements about exponents is false?
all of these are false |
|
b1 = b |
|
b0 = 1 |
|
b1 = 1 |
A number with an exponent (be) consists of a base (b) raised to a power (e). The exponent indicates the number of times that the base is multiplied by itself. A base with an exponent of 1 equals the base (b1 = b) and a base with an exponent of 0 equals 1 ( (b0 = 1).
If \( \left|b + 4\right| \) + 1 = 4, which of these is a possible value for b?
| -6 | |
| -1 | |
| 14 | |
| -17 |
First, solve for \( \left|b + 4\right| \):
\( \left|b + 4\right| \) + 1 = 4
\( \left|b + 4\right| \) = 4 - 1
\( \left|b + 4\right| \) = 3
The value inside the absolute value brackets can be either positive or negative so (b + 4) must equal + 3 or -3 for \( \left|b + 4\right| \) to equal 3:
| b + 4 = 3 b = 3 - 4 b = -1 | b + 4 = -3 b = -3 - 4 b = -7 |
So, b = -7 or b = -1.
A tiger in a zoo has consumed 56 pounds of food in 4 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 126 pounds?
| 1 | |
| 9 | |
| 2 | |
| 5 |
If the tiger has consumed 56 pounds of food in 4 days that's \( \frac{56}{4} \) = 14 pounds of food per day. The tiger needs to consume 126 - 56 = 70 more pounds of food to reach 126 pounds total. At 14 pounds of food per day that's \( \frac{70}{14} \) = 5 more days.