CCP Unit 2 Review

Find the percentage change from 1990 to 2010.

• 24.1% increase

• 19.4% increase

• 1.24 % increase

• 60.0 % increase

Find the average growth rate from 1990 to 2010.

• 20 million/year

• 3.0 million/year

• 2.7 million/year

• 0.3 million/year

The population of the gray fox in the Midwest is given by the following graph. If x=0 corresponds to the year 1980, in what year did the population grow the fastest?

• 1980

• 1985

• 1988

• 1994

The following graph shows your distance from home in miles (0<y<10) after a certain number of hours (-1<x<10). Which of the following could have been happening between hours 3 and 6?

• You were heading home.

• You were stopped and having lunch.

• You were driving away from home.

• You were traveling 40 miles per hour.

If you were trying to convince someone that defense spending had been mostly unchanged from 2004 to 2012, which graph would best illustrate your case?

• Both show the same data, so it wouldn’t matter.

• Graph 1, because the bars are close to the same height.

• Graph 2, because the bars are more varied due to scale choice on the y-axis.

• Graph 2, because the spending increased gradually and then decreased.

A gallon of milk cost $2.30 in 1970 and $2.99 in 2010. Considering that the inflation rate from 1970 to 2010 was 451%, when was milk most expensive?

• In 1970, because $2.30 in “1970 dollars” is equivalent to $10.37 in “2010 dollars.”

• In 2010, because $2.99 in “2010 dollars” is equivalent to $10.37 in “1970 dollars.”

• In 2010, because $2.99 in “2010 dollars” is equivalent to $12.67 in “1970 dollars.”

• In 1970, because $2.30 in “1970 dollars” is equivalent to $12.67 in “2010 dollars.”

Cedric works in sales and earns a base salary of $1500 per month, plus 4% of his total sales for the month. Is his monthly income a linear function of his monthly sales?

• Yes, because the monthly growth rate is 0.04 and the initial value is $1500.

• Yes, because the monthly growth rate is $1500 and the initial value is 0.04.

• No, because there is no constant growth rate in this situation.

• No, because there is no initial value in this situation.

Suppose an endangered species has a half-life of 25 years. If there are only about 1500 of the species left, how long ago were there 6000?

• 12 years

• 25 years

• 50 years

• 75 years

Suppose the formula computing the accumulated amount in a savings account is A=500(1.043)^t. What is the annual percentage growth rate for this account?

• 0.043%

• 1.043%

• 4.3%

• 104.3%

The half-life for carbon-14 is 5770 years. C₀ represents the initial amount of carbon-14 in the formula C=C₀(1/2)^t, where t is the number of half-lives. If the initial amount of carbon-14 is 16 grams, how much carbon-14 is left after 11,540 years?

• 4 grams

• 8 grams

• 12 grams

• 14 grams