OAA Mathematics 5

Question 1

What is the surface area of a cube with side length 4 cm?

Accepted Answer

96 cm²

Answer

A cube has 6 faces, each with area 4² = 16 cm², so SA = 6 × 16 = 96 cm².

Question 2

Which inequality is graphed as an open circle on –3 with the arrow pointing left?

Accepted Answer

x < –3

Answer

An open circle means the value is not included (strict inequality), and the arrow pointing left represents 'less than'.

Question 3

A recipe calls for 2/3 cup of sugar. If you want to make 1.5 times the recipe, how much sugar do you need?

Accepted Answer

1 cup

Answer

2/3 × 1.5 = 2/3 × 3/2 = 6/6 = 1 cup.

Question 4

Two lines are perpendicular. One line has a slope of 2/5. What is the slope of the other line?

Accepted Answer

–5/2

Answer

Perpendicular lines have slopes that are negative reciprocals of each other: –5/2.

Question 5

A student earned scores of 88, 76, 94, and 82 on four tests. What score does the student need on the fifth test to have an average of 85?

Accepted Answer

85

Answer

Total needed = 85 × 5 = 425; current total = 88+76+94+82 = 340; fifth score = 425 – 340 = 85.

(OAA) Ohio Achievement Assessment Practice Test