| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.20 |
| Score | 0% | 64% |
A tiger in a zoo has consumed 150 pounds of food in 10 days. If the tiger continues to eat at the same rate, in how many more days will its total food consumtion be 210 pounds?
| 11 | |
| 14 | |
| 4 | |
| 1 |
If the tiger has consumed 150 pounds of food in 10 days that's \( \frac{150}{10} \) = 15 pounds of food per day. The tiger needs to consume 210 - 150 = 60 more pounds of food to reach 210 pounds total. At 15 pounds of food per day that's \( \frac{60}{15} \) = 4 more days.
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 25% off." If Frank buys two shirts, each with a regular price of $35, how much will he pay for both shirts?
| $45.50 | |
| $61.25 | |
| $8.75 | |
| $52.50 |
By buying two shirts, Frank will save $35 x \( \frac{25}{100} \) = \( \frac{$35 x 25}{100} \) = \( \frac{$875}{100} \) = $8.75 on the second shirt.
So, his total cost will be
$35.00 + ($35.00 - $8.75)
$35.00 + $26.25
$61.25
Convert 0.0007057 to scientific notation.
| 7.057 x 10-4 | |
| 70.57 x 10-5 | |
| 7.057 x 104 | |
| 7.057 x 10-3 |
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:
0.0007057 in scientific notation is 7.057 x 10-4
What is -6z6 x 4z7?
| -24z | |
| -24z-1 | |
| -24z13 | |
| -2z7 |
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:
-6z6 x 4z7
(-6 x 4)z(6 + 7)
-24z13
A triathlon course includes a 200m swim, a 40.3km bike ride, and a 5.800000000000001km run. What is the total length of the race course?
| 68.9km | |
| 46.3km | |
| 29.2km | |
| 63.2km |
To add these distances, they must share the same unit so first you need to first convert the swim distance from meters (m) to kilometers (km) before adding it to the bike and run distances which are already in km. To convert 200 meters to kilometers, divide the distance by 1000 to get 0.2km then add the remaining distances:
total distance = swim + bike + run
total distance = 0.2km + 40.3km + 5.800000000000001km
total distance = 46.3km