Chapter 6 Exponential Equations and Functions

Does this function represent exponential growth or decay?

• Growth

• Decay

• neither

• I have no idea

Does this function represent exponential growth or decay?

• Growth

• Decay

• neither

• I have no idea

What type of function is represented by this table?

• Exponential Growth

• Exponential Decay

• Linear

• None of the above.

• I have no idea

And exponential function can be modeled by f(2) = 12 and f(5) = 96. Find the function f(x).

• f(x) = 2(3)^x

• f(x)=3(2)^x

• y = 28x + 12

• y = 12x + 28

• I have no idea

• Exponential Growth

• Exponential decay

• None of these

• I have no idea

Which equation allows you to model the following situation: You invest $400 for 5 years and the interest rate is 4.29% each year.

• y=400(1 - 0.0429)⁵

• y=400(1+.0429)⁵

• y=400(1+ 4.29)⁵

• I have no idea

A petri dish contains 20 bacteria.  Find the number of bacteria in the petri dish after 8 hours if the bacteria is tripling every hour.  

• 131,220 bacteria

• 10,240 bacteria

• 5.6 x 10¹⁵ bacteria

• I have no idea

In an exponential function, what does the 'a' represent?

• slope

• rate of change

• y-intercept

• I have no idea

Mr. T invested $15,000 in an account that pays 5% interest compounding continuously, how much is in the account after 5 years?

• $15,500.50

• $19,260.38

• $19,260.40

• I have no idea

Simplify the exponential expression.

• 2x⁶y¹²

• 2x⁵y⁷

• 8x⁶y¹²

• I have no idea