| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.32 |
| Score | 0% | 66% |
If the ratio of home fans to visiting fans in a crowd is 3:1 and all 37,000 seats in a stadium are filled, how many home fans are in attendance?
| 41,667 | |
| 27,750 | |
| 32,250 | |
| 29,167 |
A ratio of 3:1 means that there are 3 home fans for every one visiting fan. So, of every 4 fans, 3 are home fans and \( \frac{3}{4} \) of every fan in the stadium is a home fan:
37,000 fans x \( \frac{3}{4} \) = \( \frac{111000}{4} \) = 27,750 fans.
What is \( \frac{8b^7}{5b^3} \)?
| 1\(\frac{3}{5}\)b21 | |
| 1\(\frac{3}{5}\)b4 | |
| \(\frac{5}{8}\)b-4 | |
| \(\frac{5}{8}\)b4 |
To divide terms with exponents, the base of both exponents must be the same. In this case they are so divide the coefficients and subtract the exponents:
\( \frac{8b^7}{5b^3} \)
\( \frac{8}{5} \) b(7 - 3)
1\(\frac{3}{5}\)b4
Simplify \( \frac{16}{80} \).
| \( \frac{5}{14} \) | |
| \( \frac{1}{3} \) | |
| \( \frac{2}{9} \) | |
| \( \frac{1}{5} \) |
To simplify this fraction, first find the greatest common factor between them. The factors of 16 are [1, 2, 4, 8, 16] and the factors of 80 are [1, 2, 4, 5, 8, 10, 16, 20, 40, 80]. They share 5 factors [1, 2, 4, 8, 16] making 16 their greatest common factor (GCF).
Next, divide both numerator and denominator by the GCF:
\( \frac{16}{80} \) = \( \frac{\frac{16}{16}}{\frac{80}{16}} \) = \( \frac{1}{5} \)
What is \( \frac{1}{7} \) x \( \frac{4}{9} \)?
| \(\frac{4}{9}\) | |
| \(\frac{2}{45}\) | |
| \(\frac{4}{63}\) | |
| \(\frac{1}{14}\) |
To multiply fractions, multiply the numerators together and then multiply the denominators together:
\( \frac{1}{7} \) x \( \frac{4}{9} \) = \( \frac{1 x 4}{7 x 9} \) = \( \frac{4}{63} \) = \(\frac{4}{63}\)
Frank loaned Diane $800 at an annual interest rate of 5%. If no payments are made, what is the total amount owed at the end of the first year?
| $832 | |
| $848 | |
| $824 | |
| $840 |
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 = 0.05 x $800
No payments were made so the total amount due is the original amount + the accumulated interest:
total = $800 + $40