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# Consumer Mathematics

### Fraction addition with different denominators.

Sheila has 25/72 ounces of gold. Bill has 7/30 ounces of gold. How much must Kelly have so that they have a combined 1 full ounce of gold?

### Calculating price based on a consumer price index.

The consumer price index for a new car in 1990 was 110.2, and in 1995 it was 136.5. If the price of the car was \$12,880 in 1990, what was the price in 1995? a. \$15,362 b. \$15,954 c. \$16,060 d. \$16,267

### Simulating Real Plant Growth

Assuming that plant grows in 8 steps at the 0.45 rate and that the first stem lenght is 20mm - This is what I have so far: 1/ I made a table showing the length of the plant's stem at the end of each step. 2/ I made a graph of the values in the table 3/ I, of course, wrote a formula representing the growth for each step: new

### Fractions differences in algebra

Context:It would normally follow on from work on sequences and fractions. Question: Ruth was investigating fraction differences. She wrote down this sequence of fractions: 1/1, 1/2, 1/3, 1/4, 1,5 1,6 .. .. Then she worked out the difference between the consecutive fractions: 1/2, 1/6, 1/12, 1/20, 1/30, .. .. She Then worked o

### Fraction Word Problem Printing Business

Sam and Mary each owned one-half of the stock in a printing company. Sam sold two-thirds of his stock to Mary. What fractional part of the printing business does Mary now own?

### Ratios and proportions..

What are ratios and proportions?