8th Math STAAR Prep: Series 1 & 6: page 6

To find out how water usage for residential landscaping may be affected by different levels of seasonal dryness, a city water department recorded the monthly water usage of 3 customers over 4 months with different monthly rainfall amounts. The results are shown on the scatterplot.

Based on the information, which is the closest estimate for the number of gallons a household might use in a month with 6 inches of rain?

• 5,000

• 6,000

• 10,000

• 14,000

Keisha just deposited a total of $900 into savings accounts at two different banks. The $550 she deposited at Bank A will earn 2.25% interest compounded annually. The $350 she deposited at Bank B will earn 3% annual simple interest. If no additional deposits or withdrawals are made to these accounts, which amount is closest to the combined balance of the two accounts at the end of 2 years?

• $945.75

• $946.03

• $946.35

• $947.08

The dimensions of a rectangular prism are shown here.

What is the lateral surface area of this rectangular prism in square centimeters?

• 304.8 cm²

• 249.6 cm³

• 78cm²

• 360 cm²

Tags

CCSS.7.G.B.6

Aw B hale descends below the surface of the ocean in search for food. A researcher recorded the whale’s depth as a function of time and represented it on the graph.

Which statement best describes the situation?

• The whale changed its depth by -300 feet per minute.

• The whale changed its depth by -200 feet per minute.

• The whale changed its depth by -275 feet per minute.

• The whale changed its depth by -240 feet per minute.

Tags

CCSS.HSF.IF.B.4

To find out how water usage for residential landscaping may be affected by different levels of seasonal dryness, a city water department recorded the monthly water usage of 3 customers over 4 months with different monthly rainfall amounts. The results are shown on the scatterplot.

Based on the information, which is the closest estimate for the number of gallons a household might use in a month with 5 inches of rain?

• 12,000

• 6,000

• 15,000

• 9,000

Keisha just deposited a total of $750 into savings accounts at two different banks. The $450 she deposited at Bank A will earn 3% annual simple interest . The $300 she deposited at Bank B will earn 2.5% interest compounded annually . If no additional deposits or withdrawals are made to these accounts, which amount is closest to the combined balance of the two accounts at the end of 3 years?

• $810.92

• $806.25

• $813.57

• $814.80

The dimensions of a rectangular prism are shown here. What is the total surface area of this rectangular prism in square centimeters?

• 437.1 cm²

• 694.8cm²

• 874.2 cm²

• 347.4cm²

Tags

CCSS.7.G.B.6

A whale descends below the surface of the ocean in search for food. A researcher recorded the whale’s depth as a function of time and represented it on the graph.

Which statement best describes the situation?

• The whale changed its depth by -200 feet per minute.

• The whale changed its depth by -175 feet per minute.

• The whale changed its depth by -250 feet per minute.

• The whale changed its depth by -125 feet per minute.