The equation  y = 75(1.2)^x describes the number of staff since 1998.
What 'x' would you use if you wanted to calculate the number of staff in 2005?

• x = 2005
• x = 7
• x = 5
• x = 1998

USE THE CALCULATOR:
The equation  y = 75(1.2)^x describes the number of staff since 1998. 
What is an approximate number of staff in the year 2005?

• 269
• 187

Which equation shows 
"The cell population of 200 is growing by 20 percent each hour"?

• P(h) = 200 (.20)^h
• P(h) = 200 (20)^h
• P(h) = 200 (1.20)^h
• P(h) = 200 (.80)^h

The value of an investment is modeled by the function y = 125 (1.4)^x. Which statement is true

• The value of the investment will increase over time
• The value of the investment will decrease over time
• The value of the investment will remain the same

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Which of the following functions shows an initial amount of $15 and an increase of 35% each year?

• y = 15(35)^x
• y = 15(1.35)^x
• y = 15(0.35)^x
• y = 35(1.15)^x

What does the a in y=a(1+r)^x  represent?

• Time
• Rate
• Slope
• Initial Amount

The number of mosquitoes at the beginning of the summer was 4,000. The population of mosquitoes is expected to grow at a rate of 25% a month. How many mosquitoes will there be after 4 months?

• 9766
• 9006
• 9765
• 5433

Write the equation of the graph.

• f(x) = 5^x + 2

• f(x) = 3^x - 2

• f(x) = 3^x + 2

• f(x) = -3^x +2