Math 100 Unit 2 Review

Ratios & Proportions

100

Dawson thinks he will make $9 for every $100 he invests.  He invests $4100.  How much will he make?

$369

200

On a map, 1 inch equals 88 miles.  Two towns are 4 1/4 inches apart on the map.  How far would that be out in the real world?

374 miles

300

You drove 301 miles on on 19 gallons of gas.  How many miles per gallon?  Round to nearest tenth.

15.8 miles per gallon

400

Solve the proportion

y/15 = 5/27

25/9

500

What is the unit rate for 68 miles to 4 hours?  Express your answer in miles per hour

17 miles per hour

More Word Problems

100

We won 24 out of 32 games.  What percent did we win?

75%

200

Chris is buying a boat for $19,000. The bank will loan him $11,000.  He must pay $345 for license and $1300 for taxes.  How much cash will he need to pay?

$9645

300

To buy a jeep you can pay $15,500 case or put down $3750 and make 24 monthly payments of $629.91. How much would you save by paying cash to the nearest hundredth?

$3367.84

400

Kelly worked on a salary of $850 per month plus a 6% commission.  She sold $21,700 in a month.

How much did she earn that month?

$2152

500

The discount on a new refrigerator was $190.  This was discount of 25%.  What was the original selling price?

$760

50% 1/2 0.5

100

Change 61.54 to fraction form (or mixed number form and simplify if possible).

61 27/50

200

Write 172% as a decimal.

1.72

300

Change the fraction to decimal form rounded to the nearest thousandth, if necessary.

34/40

0.85

400

Change the following decimal to a percent.

0.05

5%

500

Change 4/5 to a percent.

80%

Percent Problems

100

A section of land was bought for $14,300 a few years ago.  It is now worth $15,301.  What is the percent increase?

7%

200

Jimmy bought a car for $18,900.  It is now worth $10,395.  What is the percent decrease?

45%

300

The meal cost $37.26.  The tax was $4.28 of that amount.  What was the tax rate?  Round to the nearest tenth.

11.5%

400

Stacy is considering purchasing a TV that costs $620 and has a discount of 15%. What is the amount of discount?

$93

500

115% of _____ is 38.  Round to the nearest hundredth.

33.04

Probability & Measures of Central Tendency

100

When you roll a 6 sided dice, what is the probability you roll less than or equal to a 2?

1/3

200

If you flip 3 coins, what is the probability you flip 3 tails?

1/8

300

Here are the prices of 6 computers.

$873   $805    $685   $629   $715     $685

What is the median price?

$700

400

You spin a spinner that has 3 equal sections, one red, one blue, and one yellow and roll a six-sided die.

What is the sample space for this experiment?

R1, R2, R3, R4, R5, R6

B1, B2, B3, B4, B5, B6

Y1, Y2, Y3, Y4, Y5, Y6

500

There are 7 chips numbered 1 through 7 in a box. What is the probability of reaching into a box and randomly drawing a number greater than 5?

2/7