Untitled Presentation

Multiple Choice

Which of the following formulas is used to calculate the volume of a sphere?

• V = Bh

• V = 1/3 Bh

• V = 4/3 πr^3

• V = πr^2h

Open Ended

Why is understanding formulas for area, volume, and surface area important in real-life situations?

Multiple Choice

A fishbowl shaped like a sphere is filled with water. The fishbowl has a diameter of 16 inches. Which measurement is closest to the volume of water in the fishbowl in cubic inches?

• 2,144.66 in³

• 17,157.28 in³

• 5,461.67 in³

• 6,433.98 in³

Open Ended

Explain how you would use the scatterplot to predict the speed of sound at a temperature not shown in the data. What mathematical method would you use and why?

Multiple Choice

Based on the scatterplot, what is the best prediction of the speed of sound when the air temperature is 50°C?

• 350 m/s

• 355 m/s

• 360 m/s

• 365 m/s

Multiple Choice

Which equation can be used to find x, the number of years it will take Jerry to earn the same salary as Victoria?

• 45,000x + 2,500x = 54,000x + 1,500x

• 45,000x + 2,500 = 54,000x + 1,500

• 45,000 + 2,500x = 54,000 + 1,500x

• 45,000x + 2,500x = 54,000x + 1,500

Multiple Choice

Which list shows these lengths in order from greatest to least? (Plumber W: 3/25 in, Plumber X: √3/11 in, Plumber Y: 9/100 in, Plumber Z: π/24 in)

• 9/100, π/24, 3/25, √3/11

• √3/11, π/24, 3/25, 9/100

• 9/100, 3/25, π/24, √3/11

• √3/11, 3/25, π/24, 9/100

Open Ended

How do you determine if a relation is a function from a set of ordered pairs?

Multiple Select

A relation contains the points (1, 2), (2, –1), (3, 0), (4, 1), and (5, –1). Which statement accurately describes this relation?

• The relation does not represent y as a function of x, because each value of x is associated with a single value of y.

• The relation represents y as a function of x, because one value of y is associated with two values of x.

• The relation does not represent y as a function of x, because each value of y is associated with two values of x.

• The relation represents y as a function of x, because each value of x is associated with a single value of y.

Multiple Choice

Which measurement is closest to the shortest distance in miles from Natasha's house to the library?

• 2.6 mi

• 1.9 mi

• 1.4 mi

• 2.3 mi

Multiple Choice

Which equation can be used to find V, the volume of the cylinder in cubic feet, if the cylinder has a diameter of 12 feet and a height of h feet?

• V = π(6)^2h

• V = π(6h)^2

• V = π(12)^2h

• V = π(12h)^2

Multiple Choice

An employee put $5,000.00 in a retirement account that offers 9% interest compounded annually. The employee makes no additional deposits or withdrawals. Which amount is closest to the interest the employee will have earned at the end of 5 years?

• $229.09

• $450.00

• $2,250.00

• $2,693.12

Multiple Choice

Which table shows the relationship between the time in seconds, x, and the height of the balloon in feet, y, given that after 5 seconds the height is 20 feet and the balloon rises at a constant rate?

• F

• H

• G

• J

Multiple Choice

Which Venn diagram correctly represents the relationship between rational numbers and irrational numbers?

• A

• B

• C

• D

Multiple Choice

Based on the information that Rudolfo has 15 toys in his toy box and adds 2 new toys every month, which representation best shows the relationship between the number of toys Rudolfo has in his toy box, y, and the number of months that have passed, x?

• F

• H

• G

• J

Multiple Choice

Which rule best represents the dilation that has been applied to triangle JKL to create triangle J'K'L'?

• (x, y) → (x + 6, y - 3)

• (x, y) → (x + 4.5, y + 3)

• (x, y) → (1/2 x, 1/2 y)

• (x, y) → (7/4 x, 7/4 y)

Multiple Choice

Joseph ran a 6-mile race in 48 minutes. Which graph has a slope that best represents Joseph’s average rate of speed during the race?

• F

• H

• G

• J

Multiple Choice

Which list shows these numbers in order from least to greatest? 37/6, –5.17, √33, 26/5

• 26/5, –5.17, 37/6, √33

• –5.17, 26/5, 37/6, √33

• 26/5, –5.17, √33, 37/6

• –5.17, 26/5, √33, 37/6

Multiple Choice

Which rule describes the transformation when pentagon VWXYZ is reflected across the x-axis to create pentagon V'W'X'Y'Z'?

• (x, y) → (x, –y)

• (x, y) → (x, y + 8)

• (x, y) → (–y, x)

• (x, y) → (–x, y)

Multiple Choice

An investor puts $2,500 into a life insurance policy that pays 8.5% simple annual interest. If no additional investment is made into the policy, how much accumulated interest should the investor expect at the end of 10 years?

• $21,250.00

• $2,125.00

• $212.50

• $21.25

Open Ended

Given the dimensions of the cone and cylinder shown, explain how you would determine which container holds more volume and why.

Multiple Choice

Which situation can be represented by the equation 7x + 1 = 10x?

• Brody ran at a constant rate of 7 miles per hour in a race. Candice ran at a constant rate of 10 miles per hour in a race and started 1 mile in front of the starting point. What is x, the number of hours that Brody and Candice would have to run in order for their distance to be the same?

• Brody played a game where he scored 8 points per hour. Candice played the game and scored 10 points per hour. What is x, the number of hours that Brody and Candice would each have to play the game in order for their scores to be the same?

• Brody went to two different amusement parks. The first park charged $7 per hour and gave a 1% discount for showing a student ID. The other park charged $10 per hour. What is x, the number of hours that Brody would have to stay at each park to have to pay the same amount?

• Brody rode his bicycle on two different days. The first day he rode 7 miles per hour and started 1 mile from his house. The second day he started from his house and rode 10 miles per hour. What is x, the number of hours that Brody would have to ride his bicycle to travel the same distance on both days?

Open Ended

Reflect on the formulas provided in the STAAR Grade 8 Mathematics Reference Materials. Which formula or concept do you find most useful or interesting, and why?

Multiple Choice

Which formula would you use to find the area of a trapezoid?

• A = 1/2(b1 + b2)h

• A = bh

• A = πr^2

• A = 1/2bh