APPC 2.5B video check

What is the percent increase for the function f(x) = 0.5(1.2)^x?

• 0.5%

• 1.2%

• 20%

• 50%

What is the percent decrease for the function f(x) = 2(0.7)^x?

• 0.7%

• 2%

• 30%

• 70%

A home's value V is $200,000 and increases by 1.5% per year t. Which function models this scenario?

• V(t) = 200,000(0.015)^t

• V(t) = 200,000(1.5)^t

• V(t) = 200,000(1.015)^t

• V(t) = 200,000(1 - 0.015)^t

A radioactive material has an initial mass of 150 grams and a half-life of 4,400 years. Which function models the mass g(t) of the material remaining after t years?

• g(t) = 150 * (2)^(t/4400)

• g(t) = 150 * (1/2)^(4400t)

• g(t) = 150 * (1/2)^(t/4400)

• g(t) = 4400 * (1/2)^(t/150)

If a quantity increases by a factor of 3 every day, what does the equivalent form f(t) = (3^7)^(d/7) indicate about the quantity's change?

• The quantity increases by a factor of 3 every 7 days.

• The quantity increases by a factor of 3^7 every week.

• The quantity increases by a factor of 7 every 3 days.

• The quantity increases by a factor of 3 every week.