Eoc review answer sheet 2

FS Geometry EOC Review MAFS.912.G-MG.1.1 Size It Up.

http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/72100

1. Choose geometric solids to model each object. Describe specifically the shape(s) of the solid(s) you chose as components of each model.

Camping Calculations

http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/72106

You are designing a frame for your tent. You would like the angle formed by the two support poles at the top of the tent to be 100째.

1. If the sides of the tent are perpendicular to the ground, what is the degree measure of the angle formed by the two support poles indicated in the model?

Use properties of geometric shapes to support your answer.

Modeling with Geometry - Teacher

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FS Geometry EOC Review Estimating Volume

http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/72122

1. Use geometric solids to model the trunk of the tree. Describe the shape(s) you chose for your model. Sketch your model and its dimensions. Using the model, estimate the volume of a tree trunk if the height of the trunk is 15 feet and the circumference is 30 inches. Show your work.

Estimating Area

http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/72148

Suppose you want to determine the approximate area of a lake at a recreational park using the information given in the park’s brochure. The triangles on the map signify the locations of picnic sites. The distances between the sites are given on the map.

Use geometric shapes to model the area of the lake. Sketch the model you choose and include its dimensions. Using your model, estimate the surface area of the lake. Show your work.

Modeling with Geometry - Teacher

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FS Geometry EOC Review MAFS.912.G-MG.1.1 EOC Practice 1. The diameter of one side of a 10-foot log is approximately 13 inches. The diameter of the other side of the log is approximately 11 inches. Which is the best way to estimate the volume (in cubic feet) of the log?

A. 3 ∙  ∙ 10 B. 3 ∙  1 ∙ 10 C. 3 ∙  36 ∙ 10 D. 3 ∙  144 ∙ 10

2. Based on the two diagrams shown, which formula would be best to use to estimate the volume of City Park Pond?

A. đ?‘‰ = đ?œ‹đ?‘&#x; â„Ž B. đ?‘‰ = đ?œ‹đ?‘&#x; C. đ?‘‰ = đ??ľâ„Ž D. đ?‘‰ = đ?œ‹đ?‘&#x; â„Ž

Modeling with Geometry - Teacher

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FS Geometry EOC Review 3. An object consists of a larger cylinder with a smaller cylinder drilled out of it as shown.

What is the volume of the object?

A. B. C. D.

đ?œ‹(đ?‘… − đ?‘&#x; (đ?œ‹đ?‘… − đ?‘&#x; (đ?‘… − đ?œ‹đ?‘&#x; đ?œ‹(đ?‘… − đ?‘&#x;)

)â„Ž )â„Ž )â„Ž â„Ž

4. An igloo is a shelter constructed from blocks of ice in the shape of a hemisphere. This igloo has an entrance below ground level.

The outside diameter of the igloo is 12 feet. The thickness of each block of ice that was used to construct the igloo is 1.5 feet. Estimate in cubic feet the amount of space of the living area inside the igloo.

Acceptable answers: 190.85 Â đ?‘“đ?‘Ą , 190.9 Â đ?‘“đ?‘Ą , and 191 Â đ?‘“đ?‘Ą

Modeling with Geometry - Teacher

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FS Geometry EOC Review MAFS.912.G-MG.1.2 Population of Utah

http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/72070

1. The diagram below represents the state of Utah. The boundaries of the state are labeled (in miles) according to their approximate lengths. Use the information in the diagram to estimate the state’s population given a population density of 34.489 people per square mile. Explain your reasoning and show your calculations.

159 mi

345 mi 276 mi

265 mi

How Many Trees?

http://www.cpalms.org/Public/PreviewResource/Preview/72102

A forester is trying to determine the number of long leaf pine trees in a forest that covers 83 acres. She marks off three half-acre plots at randomly selected locations in the forest. The first plot contains 212 mature trees, the second plot contains 242 mature trees, and the third plot contains 236 mature trees. Use this data to estimate the number of mature long leaf pines in the entire forest. Explain your reasoning and show all of your work.

Mudslide

http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/72112

A mudslide has breached a retaining wall on a local highway. The mudslide stretches for 20 meters along the highway.

The mud is 3 meters high at its highest point and covers the entire width of the road, 8 meters.

The engineers from the Department of Transportation need to estimate the mass of the mud on the highway in order to determine how many trucks are needed to haul it away.

3 meters

1.

Create a mathematical model of the mud on the highway and estimate its volume. Show all of your work carefully and completely.

8 meters Modeling with Geometry - Teacher

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FS Geometry EOC Review

MAFS.912.G-MG.1.2 EOC Practice 1. Given the size and mass of each of the solid cubes X and Y, how many times is the density of cube X greater than the density of cube Y?

A. B. C. D.

4 6 8 16

2. An aviary is an enclosure for keeping birds. There are 134 birds in the aviary shown in the diagram.

What is the number of birds per cubic yard for this aviary? Round your answer to the nearest hundredth.

A. B. C. D.

0.19 birds per cubic yard 0.25 birds per cubic yard 1.24 birds per cubic yard 4.03 birds per cubic yard

3. County X has a population density of 250 people per square mile. The total population of the county is 150,000.

Which geometric model could be the shape of county X? A. B. C. D.

a parallelogram with a base of 25 miles and a height of 25 miles a rectangle that is 15 miles long and 45 miles wide a right triangle with a leg that is 30 miles long and a hypotenuse that is 50 miles long a trapezoid with base lengths of 10 miles and 30 miles and a height of 25 miles

4. Which field has a density of approximately 17,000 plants per acre?

A. B. C. D.

85 acres with 1.02 × 106 plants 100 acres with 1.7 × 107 plants 110 acres with 1.9 × 106 plants 205 acres with 3.4 × 105 plants

Modeling with Geometry - Teacher

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FS Geometry EOC Review MAFS.912.G-MG.1.3 Land for the Twins

http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/72141

Paul and Paula own a triangular tract of land with sides that measure 600 feet, 800 feet and 1000 feet. They wish to subdivide the entirety of this land into two regions of equal areas by constructing a fence parallel to the shortest side.

1. Draw a diagram that models the problem situation. Label all given lengths and include a segment that represents the fence to be constructed.

2. The problem is to determine the length of the fence. Formulate this problem by clearly defining one or more variables and indicating an appropriate set of equations that when solved determine the values of the variables.

Formulation of the equation(s) is sufficient; it is not necessary to solve the equation(s).

The Sprinters’ Race

http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/72161

Adam, Barry, and Carlos decide to have a race on a large open field. They begin simultaneously with Adam starting at A, Barry at B, and Carlos at C. The winner is the first person to cross the “finish circle,” a circle with diameter 10 yards.

Indicate on the graph the location of the center of this finish circle that results in each sprinter running the same distance.

Explain your reasoning.

Modeling with Geometry - Teacher

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FS Geometry EOC Review The Duplex

http://www.cpalms.org/Public/PreviewResourceAssessment/Preview/72205

A developer wishes to construct a duplex (two residential units that are side-by-side, sharing a common wall). The interior floors are to be congruent rectangles with areas of 1200 square feet.

1. Draw a sketch of the floor plan and indicate three distinct sets of possible dimensions (length and width) of the floors.

2. The outside wall and the common wall that separates the residences are constructed from cinderblocks. Let l represent the length of one residential unit of the duplex and w represent its width. Write a function, in terms of l, that describes the total length of cinderblocks needed for all walls (including both the exterior and common walls).

Modeling with Geometry - Teacher

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FS Geometry EOC Review MAFS.912.G-MG.1.3 EOC Practice 1. Stephanie is going to form a clay model of the moon. The model will have a diameter of 2 feet, and the clay she will use comes in containers as described below. What is the least number of containers Stephanie will need in order to complete the model?

A. B. C. D.

3 11 16 22

2. Lewis is going to form a clay model of a skyscraper. The model will be in the shape of a 2-foot tall prism with a 6-inch by 6-inch base. The clay he will use comes in containers as described below. What is the least number of containers Lewis will need in order to complete the model?

A. B. C. D.

1 2 4 12

3. Beth is going to enclose a rectangular area in back of her house.

The house wall will form one of the four sides of the fenced-in area, so Beth will only need to construct three sides of fencing.

Beth has 48 feet of fencing. She wants to enclose the maximum possible area. What amount of fence should Beth use for the side labeled x?

A. B. C. D.

12 feet 16 feet 24 feet 32 feet

Modeling with Geometry - Teacher

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FS Geometry EOC Review 4. Mr. Fontenot planted four types of soybeans on his land in order to compare overall cost (for planting and harvesting) and crop harvest. The table shows the number of acres planted, the cost per acre, and the number of bushels of soybeans produced for the different types of soybeans.

Part A Regulations specify that Mr. Fontenot cannot devote more than 80% of a field to one particular type of soybean. He wants to design a field so that he can harvest the most soybeans for the lowest cost. What is the best design plan for Mr. Fontenot’s 525 acres? Include specific details about which soybeans you chose, how many acres of each type should be planted, and why you chose those soybeans.

Sample Answer: Mr. Fontenot should plant 420 acres of soybean C and 105 acres of soybean D. 525 * 0.8 = 420 Cost per bushel: A = $3.88; B = $3.62; C = $3.26; D = $3.40 Soybean C has the lowest cost per bushel to produce and therefore should be planted on the maximum 80%. Soybean D has the next lowest cost per bushel to produce and should be used for the other 20%.

Part B This table shows the profit Mr. Fontenot can earn per bushel for each type of soybean.

Determine if the design plan created in part A is the most profitable 80/20 design. 

If part A is the most profitable plan, explain why it is the most profitable and include specific details about the profitability of the plan from part A compared to all other possible design plans.



If part A is not the most profitable plan, determine which design plan is the most profitable and include specific details about the profitability of the plan from part A compared to this design plan.

OR

Sample Answer: The design plan in part A is not the most profitable 80/20 design. Mr. Fontenot should plant 420 acres of soybean D and 105 acres of soybean C. Based on the numbers of bushels per acre and the profit per bushel, Soybean D yields the greatest profit for the larger section of 420 acres. Soybean C yields the next greatest profit based on bushels per acre and profit, and should be used for the other 20%. This would be a total profit of $131,380.20 which is $6,539.40 greater than the profit of $124,840.80 from the plan in part A. Modeling with Geometry - Teacher

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