Answer:
#1 The answer is B.
#2 The answer is A.
#3 D is the correct answer
#4 D is the correct answer again.
Step-by-step explanation:
#1 Simply divide 42ft by 3 1/2 ft and your answer is 12 slats
#2 Divide 10.5 by 3 and you get 3.5.
#3 Multiply $6.99 by 2 and you get 13.98. Multiply that by 107% and your answer is about 14.96.
#4 When you add up the total price, you get $15.77. When you subtract this from $20, you get $4.23.