TEKS.MATH.9-12.VII.C

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

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TEKS.MATH.9-12.VII.C

A ball is thrown into the air with an upward velocity of 40ft/s. Its height h in feet after t seconds is given by the function :

h(t) = -16t² + 40t + 10

How many seconds does it take the ball to reach its maximum height?

• 1.25 seconds

• 1.4 seconds

• 2.5 seconds

• 2 seconds

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TEKS.MATH.9-12.VII.C

Find the area under a curve defined by the equation 5x⁴+3x+7 between the x values 0 and 4.

• 1200
• 1/12
• 1134
• 1076

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TEKS.MATH.9-12.VII.C

Write the equation of the line with slope 3/5 through the point (20, 6).

• y = 3/5x - 6
• y = 3/5x +18
• y = 3/5x - 18
• y = 3/5x +6

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TEKS.MATH.9-12.VII.C

Write the equation of a line that goes through the points (9, -2) and (-3,2) in slope intercept form.

• y=-⅓x+1
• y=⅓x+1
• y=-3x+25
• y=3x-29

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TEKS.MATH.9-12.VII.C

The value of a car is $15,000 and depreciates at a rate of 8% per year. What is the exponential equation that models this situation?

• y = 8(15,000)^x

• y = 15,000(1.08)^x

• y = 15,000(0.92)^x

• y = 15,000(0.08)^x

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TEKS.MATH.9-12.VII.C

Suppose y varies inversely with x.
If y = 150 when x = 2, find y when x = 25.

• 300
• 75
• 1,875
• 12

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TEKS.MATH.9-12.VII.C

Which function has the zeros of 10 and -7

• x² + 3x - 70

• x² - 3x - 70

• x² + 3

• Not enough information

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TEKS.MATH.9-12.VII.C

Caiden deposited $475 in an account that pays an interest rate of 3.8% compounded annually. What will be his balance after 15 years?

• $827.52

• $831.10

• $839.45

• $846.80

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TEKS.MATH.9-12.VII.C

In the formula  $A=P\left(1+\frac{r}{n}\right)^{nt}$  , what does n stand for?

• net income

• number of times compounded per  year 

• time for it to half, double, triple . . .

• initial amount

• natural log

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TEKS.MATH.9-12.VII.C