2018 STAAR 8th Grade Math Test

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

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

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

Tags

CCSS.HSF.BF.A.2

Four plumbers estimated the length of the radius of a cylindrical pipe. The estimates made by the plumbers are listed. - Plumber W estimated that the radius had a length of (3/25) inches. - Plumber X estimated that the radius had a length of (sqrt(3/11)) inches. - Plumber Y estimated that the radius had a length of (9/100) inches. - Plumber Z estimated that the radius had a length of (pi/24) inches. Which list shows these lengths in order from greatest to least?

• (9/100), (pi/24), (3/25), (sqrt(3/11))

• (sqrt(3/11)), (pi/24), (3/25), (9/100)

• (9/100), (3/25), (pi/24), (sqrt(3/11))

• (sqrt(3/11)), (3/25), (pi/24), (9/100)

Tags

CCSS.8.NS.A.2

Jerry has a new job and earns a salary of $45,000. Victoria has a new job and earns a salary of $54,000. Jerry will receive a salary increase of $2,500 per year, and Victoria will receive a salary increase of $1,500 per year. Which equation can be used to find x, the number of years it will take Jerry to earn the same salary as Victoria?

• 45,000 + 2,500x = 54,000 + 1,500x

• 45,000x + 2,500x = 54,000x + 1,500

• 45,000 + 2,500 = 54,000x + 1,500

• 45,000x + 2,500x = 54,000x + 1,500x

Natasha walked from the library to the grocery store and then to her house. 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

Tags

CCSS.8.G.B.8

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.

Tags

CCSS.8.F.A.1

In a museum there is a sculpture in the shape of a cylinder. The cylinder has a diameter of 12 feet and a height of h feet. Which equation can be used to find V, the volume of the cylinder in cubic feet?

• V = π(6)^2h

• V = π(6h)^2

• V = π(12)^2h

• V = π(12h)^2

Tags

CCSS.8.G.C.9

CCSS.HSG.GMD.A.3

Julie started with 20 pieces of gum and gave away x pieces. Conrad started with 35 pieces of gum and gave away twice as many pieces as Julie did. How many pieces of gum did Julie give away if they had the same number of pieces of gum left?

• 18

• 5

• 15

• 8

Tags

CCSS.7.EE.B.4A

A container is shaped like a triangular prism. Each base of the container is an equilateral triangle with the dimensions shown. The container has a height of 15 centimeters. What is the lateral surface area of the container in square centimeters? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

Tags

CCSS.7.G.B.6

Trapezoid PQRS is rotated 180° about the origin to form trapezoid P'Q'R'S'. Which statement is true?

• The sum of the angle measures of trapezoid PQRS is 180° less than the sum of the angle measures of trapezoid P'Q'R'S'.

• Trapezoid PQRS is not congruent to trapezoid P'Q'R'S'.

• The area of trapezoid PQRS is less than the area of trapezoid P'Q'R'S'.

• The angle measures of trapezoid PQRS are equal to the corresponding angle measures of trapezoid P'Q'R'S'.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5