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Laabri

June 2018 Parts 2,3,4

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PART II: Answer the question in this part. Each correct answer will receive

2 credits. Clearly indicate the necessary steps, including appropriate formula substitutions, diagrams, graphs, charts, etc. Utilize the information provided to determine your answer. Not that diagrams are not necessarily drawn to scale. A correct numerical answer with no work shown will receive only

1 credit. All answers should be written in pen, except for graphs and drawings, which should be done in pencil.

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1.

Graph the function

over the domain

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2.

Caleb claims that the ordered pairs shown in the table shown are a nonlinear function.

State if Caleb is correct. Explain your reasoning.

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3.

Solve for x to the nearest tenth :

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4.

The graph of the function p(x) is represented on the accompanying graph. On the same set of axes, sketch the function p (x + 2) .

Describe the transformation that took place.

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5.

When an apple is dropped from a tower 256 feet high, the function h(t) = -16t2 + 256 models the height of the apple, in feet, after t seconds.

Determine, algebraically, the number of seconds it takes the apple to hit the ground.

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6.

Solve the equation below algebraically for the exact value of x .

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7.

Is the product of the two numbers below rational or irrational?

Explain your reasoning.

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8.

On the set of axes provided, graph the piecewise function:

PART III: Answer the question in this part. Each correct answer will receive

4 credits. Clearly indicate the necessary steps, including appropriate formula substitutions, diagrams, graphs, charts, etc. Utilize the information provided to determine your answer. Not that diagrams are not necessarily drawn to scale. A correct numerical answer with no work shown will receive only

1 credit. All answers should be written in pen, except for graphs and drawings, which should be done in pencil.

Asemmisa {{asɛmmisaAhyɛnsode}}
9.

A population of rabbits in a lab, p(x),

can be modeled by the function

p(x) = 20(1.014)x ,

where x represents the number of

days since the population was first counted.

Explain what 20 represents

in the context of the problem.

Asemmisa {{asɛmmisaAhyɛnsode}}
10.

A population of rabbits in a lab, p(x),

can be modeled by the function

p(x) = 20(1.014)x ,

where x represents the number of

days since the population was first counted.

Explain what 1.014 represents

in the context of the problem.

Asemmisa {{asɛmmisaAhyɛnsode}}
11.

A population of rabbits in a lab, p(x),

can be modeled by the function

p(x) = 20(1.014)x ,

where x represents the number of

days since the population was first counted.

Determine, to the nearest tenth, the average rate of change from day 50 to day 100.

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12.

There are two parking garages in Beacon Falls. Garage A charges $7.00 to park for the first 2 hours, and each additional hour costs $3.00. Garage B charges $3.25 per hour to park.

When a person parks for at least 2 hours, write the equation to model the cost of parking for a total of x hours in Garage A.

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13.

There are two parking garages in Beacon Falls. Garage A charges $7.00 to park for the first 2 hours, and each additional hour costs $3.00. Garage B charges $3.25 per hour to park.

When a person parks for at least 2 hours, write the equation to model the cost of parking for a total of x hours in Garage B.

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14.

There are two parking garages in Beacon Falls. Garage A charges $7.00 to park for the first 2 hours, and each additional hour costs $3.00. Garage B charges $3.25 per hour to park.

Determine algebraically the number of hours when the cost of parking at both garages will be the same.

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15.

On the set of axes provided, graph the following system of inequalities:

Determine if the point (1, 2) is in the solution set.

Explain your answer.

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16.

The percentage of students scoring 85 or better on a mathematics final exam and an English final exam during a recent school year for seven schools is shown in the table.

Write the linear regression equation for these data, rounding all values to the nearest hundredth .

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17.

The percentage of students scoring 85 or better on a mathematics final exam and an English final exam during a recent school year for seven schools is shown in the table.

State the correlation coefficient of the linear regression equation, to the nearest hundredth .

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18.

The percentage of students scoring 85 or better on a mathematics final exam and an English final exam during a recent school year for seven schools is shown in the table.

State the correlation coefficient of the linear regression equation, to the nearest hundredth .

Explain the meaning of the correlation coefficient in the context of these data.

PART IV: Answer the question in this part. Each correct answer will receive

6 credits. Clearly indicate the necessary steps, including appropriate formula substitutions, diagrams, graphs, charts, etc. Utilize the information provided to determine your answer. Not that diagrams are not necessarily drawn to scale. A correct numerical answer with no work shown will receive only

1 credit. All answers should be written in pen, except for graphs and drawings, which should be done in pencil.

Asemmisa {{asɛmmisaAhyɛnsode}}
19.

Dylan has a bank that sorts coins as they are dropped into it. A panel on the front displays the total number of coins inside as well as the total value of these coins. The panel shows 90 coins with a value of $17.55 inside of the bank.

If Dylan only collects dimes and quarters, write one of the two equations that could be used to model this situation.

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20.

Dylan has a bank that sorts coins as they are dropped into it. A panel on the front displays the total number of coins inside as well as the total value of these coins. The panel shows 90 coins with a value of $17.55 inside of the bank.

If Dylan only collects dimes and quarters, write the OTHER of the two equations that could be used to model this situation.

Asemmisa {{asɛmmisaAhyɛnsode}}
21.

Dylan has a bank that sorts coins as they are dropped into it. A panel on the front displays the total number of coins inside as well as the total value of these coins. The panel shows 90 coins with a value of $17.55 inside of the bank.

Using your system of equations, algebraically determine the number of quarters Dylan has in his bank.

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22.

Dylan has a bank that sorts coins as they are dropped into it. A panel on the front displays the total number of coins inside as well as the total value of these coins. The panel shows 90 coins with a value of $17.55 inside of the bank.

Dylan's mom told him that she would replace each one of his dimes with a quarter. If he uses all of his coins, determine if Dylan would then have enough money to buy a game priced at $20.98 if he must also pay 8% sales tax. Justify your answer.