Application of Exponential

What type of function is f(x)=2(1/7)^x ?

• Exponential Growth

• Linear

• Exponential Decay

• None of the Abovee

A savings account with $2000 earns 1.25% interest each year. Which function models this situation? 

• y = 2000⋅1.25^t

• y = 2000⋅.0125^t

• y = 2000⋅1.0125^t

• y = 2000⋅1.125^t

Which curve would be the steepest?

• y = 3 (0.1)^x

• y = 3 (10)^x

• y = 3 (1.95)^x

• y = 3 (0.95)^x

Which curve would be the flattest?

• y = 3 (0.1)^x

• y = 3 (10)^x

• y = 3 (1.95)^x

• y = 3 (0.95)^x

You invest $5,000 into a savings account that has an interest rate of 5% compounded continuously. In how many years will there be $12000 in the account?

• 12.375 Years

• 177.073 Years

• 0.175 Years

• 17.509 Years

What is the asymptote of this function:
 f(x) = 2^x-1 + 3

• x = 1

• x = -1

• y = 3

• y = - 3

Write the explicit formula for the geometric sequence.

• a_n = 162(2/3)^n-1

• a_n = (2/3)(162)^n-1

• a_n = 162(3/2)^n-1

• a_n = 162 + (n-1)(-54)

Write the exponential regression equation for the data.

• Y=8.16(2.7)^x

• Y=81.6(2.7)^x

• Y=8.16(.27)^x

• Y=8.16(27)^x

Interpret the meaning of the values "a" and "b"

• a =1.023, b=125,500

• a is the initial number of subscribers, b is the rate at which the subscribers decrease.

• a is the rate at which the subscribers increase, b is the initial number of subscribers.

• a is the initial number of subscribers, b is the rate at which the subscribers increase.

Interpret the meaning of "a" and "b". (choose all that apply)

• a=250, b= 0.982

• a is the initial radioactive material in grams, b is the rate at which the mass decreases.

• a=0.982, b =250

• a is the initial radioactive materials in grams, b is the rate at which the mass increases.