7.9 Proficiency exam

( [link] ) Compare 4 cassette tapes to 7 dollars.

( [link] ) What do we call a comparison, by division, of two unlike denominate numbers?

( [link] ) 11 to 9

( [link] ) 5 televisions to 2 radios

( [link] ) $\frac{\text{8 maps}}{\text{3 people}}$

( [link] ) $\frac{\text{2 psychologists}}{\text{75 people}}$

( [link] ) $\frac{8}{x}=\frac{\text{48}}{\text{90}}$

( [link] ) $\frac{x}{7}=\frac{4}{\text{28}}$

( [link] ) $\frac{\text{3 computers}}{\text{8 students}}=\frac{\text{24}\text{ computers}}{x\text{ students}}$

( [link] ) On a map, 4 inches represents 50 miles. How many miles does 3 inches represent?

( [link] ) An acid solution is composed of 6 milliliters of acid to 10 milliliters of water. How many milliliters of acid are there in an acid solution that is composed of 3 milliliters of water?

( [link] ) The odds that a particular event will occur are 9 to 7. If the event occurs 27 times, how many times would you predict it will it not occur?

( [link] ) 0.82

( [link] ) $3.\stackrel{\_}{7}$

( [link] ) 2.813%

( [link] ) 0.006%

( [link] ) $\frac{\text{42}}{5}$

( [link] ) $\frac{1}{8}$

( [link] ) $\frac{\text{800}}{\text{80}}$

( [link] ) 15%

( [link] ) $\frac{4}{\text{27}}$ %

( [link] ) What is 18% of 26?

( [link] ) 0.618 is what percent of 0.3?

( [link] ) 0.1 is 1.1% of what number?

( [link] ) A salesperson makes a monthly salary of $1,000.00. He also gets a commission of 12% of his total monthly sales. If, in a particular month, he sells $5,500.00 worth of merchandise, what is his income that month?