Where did the carbon atoms in Leslie’s hair originate? (The photo shows Leslie at age $16$.)

In 1998, there were 37,775 injuries on farms to people under age 20. Since then, this number has steadily decreased. Using the following graph, find the rate of change, rounded to the nearest ten, in the number of farm injuries to people under age 20 with respect to time.

Why can’t radiocarbon dating be used to determine the age of an artifact that is over 50,000 years old?

Fill up the blank. A decrease in the value of your car because of its age or condition is called _____.

For each question, write a short response.

Why is the Cenozoic Era also known as the Age of Mammals?

In 28 years, Mark will be 5 times as old as he is now. Find his present age.

Starting on his fortieth birthday, Michael Branson deposits $2000 per year in an Individual Retirement Account until age 65 (last payment at age 64). Find the total amount in the account if he had a guaranteed interest rate of 3% compounded annually.

Which of the following would be most consistent with an origin of Upheaval Dome by rising mama?

A. an igneous body should exist beneath the crater

B. baking of the layers closest to the magma

C. an age determination on igneous rocks that is younger than the age of the rock layers

D. all of these

Use your class as a sample. Determine the mean, median, and standard deviation for the age of students in your class. What $z$ score would a 40 -year-old have? Would it be unusual to have an age of 40? Find the skew of the data, using the Pearson coefficient of skewness.

A fossil contains $20 \%$ of the carbon-14 that the organism contained when it was alive. Estimate its age.

The value of a car, $V = f(a)$, in thousands of dollars, is a function of the age of the car, $a$, in years.

Interpret the statement $f(5) = 6$

A fast new type of ship, the$\underline{\phantom{\text{justekst}}}$ helped begin the Age of Exploration.

Calculate the t test statistic.

The weight w (in pounds) of a killer whale can be modeled by

$$w=280+325 \sqrt{t}, \quad 0 \leq t \leq 144$$

where t represents the age (in months) of the killer whale. At what age did the killer whale weigh about 3400 pounds?