C. 6 light plate covers and 4 outlet plate covers

Explanation: You need to find the total cost of each group of items by setting numerical expression. The group that totals less that $10 is what he can afford.
The numerical expressions of each group would look like this:
7(.75) + 4(1.25) = $10.25
6(.75) + 6(1.25) = $12
6(.75) + 4(1.25) = $9.50
5(.75) + 6(1.25) = 11.25
Because C is less than $10, that is the correct answer.

B. 2

Explanation: This question is testing your ability to determine slope for a linear line. Slope can be found by using the rise over run formula, which states the (y2-­y1)/(x2-x1). The line in this graph passes through (1,9) and (2,11). Therefore, y2 = 11 and y1 = 9 and x2 = 2 and x1 = 1. Plug these values into the formula: (11-­9)/(2­-1)= 2/1

A. ¼

Explanation: According to the table there are 5 red balls with spots, 3 red balls with stars and 4 red balls with hearts. So, 5 + 3 + 4 = 12. Since 3 of these have stars, that means three of them are a possible outcome. So a child has a 3/12 possibility for choosing a red ball with stars. 3/12 can then be reduced to ¼.

C. Tuesday

Explanation: A prime number is that which can only be divided by itself. 11 is the only prime number in the set of data.

B. 18 ft³

Explanation: This question is testing your ability to determine the volume of a cylinder. The volume of a cylinder can be found by using the formula, v= πr²h
In this problem, r = 1.5 and h = 2.5, so
v = π(1.5)²(2.5)
v = π (2.25)(2.5)
v = π 5.63
v= 17.69, then round up to the nearest whole number to get 18.