Math I Mixed Review 1~No Calculator

• p = 180(12)^x

• p = 180(1.12)^x

• p = 180(1.012)^x

• p = 180(0.12)^x

Answer explanation

• all integer values of x

• all positive integer values of x

• 0 ≤ x ≤ 2 where x is an integer

• 0 ≤ x ≤ 3 where x is an integer

Answer explanation

• t = 16

• t = 2

• t = 1

• t = 0

Answer explanation

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• The shoreline is reduced by 0.5 foot every 10 years.

• The shoreline is increased by 0.5 foot every 10 years.

• The shoreline is reduced by 26 feet every 10 years.

• The shoreline is increased by 26 feet every 10 years.

Answer explanation

• The function is negative and decreasing on the interval.

• The function is negative and increasing on the interval.

• The function is positive and decreasing on the interval.

• The function is positive and increasing on the interval.

Answer explanation

Positive refers to the fact that is above the x-axis;

Decreasing is the direction from left to right (think about slope).

The function f(x) = 8(2)^x represents the number of bacteria, f(x), growing in a culture after x hours.

How many bacteria are in the culture after 4 hours?

Answer explanation