Exponential Function Half Life

Estimate the half-life of the radioactive substance shown in the graph:

• 6 months

• 6 hours

• 1 year

• 1 minute

The half-life of ibuprofen is 1-hour. You take 400 mg of ibuprofen. Write an exponential equation that could be used to find the amount of ibuprofen you have remaining in your body after x hours.

Describe the function:

• exponential growth

• exponential decay

What is the equation of the asymptote of the function?

• y=0

• y=50

• y=100

• y=25

• 32 grams

• 16 grams

• 25 grams

• 31.24 grams

The half-life of chromium-51 is 28 days. If the sample contained 510 grams, how much chromium-51 would remain after 56 days?

• 127.5 g

• 164.3 g

• 23.45 g

• 287 g

• 14,195.08 grams

• 26.2 grams

• 1.36 grams

• 2.93 grams

Half-Life: About how many grams of a 500 g sample of Technetium-99 is left after 48 hours?

• 1.95

• 31.25

• 7.81

• 62.5

The half-life of Radium-224 is 3.7 years. If the initial amount of Radium-224 is 0.15 mg, write the equation that would best model the mass of Radium-224 after t years.

Mathematical Equivalence

ON

Which equation can be used to find how much of a 50 g sample of Nitrogen-16 is left after 420 sec?