Answer:
A. 15 cubic units
Step-by-step explanation:
Volume = length × width × height
V = lwh
V = 4 × × 1 1/2 × 2 1/2
There are two fractions here. Convert them to improper fractions to make the multiplication easier on yourself
(Denominator × whole number + numerator)/ denoninator = improper fraction
(2 × 1 + 1)/2 = 3/2
Next fraction
(2 × 2 + 1)/2 = 5/2
Plug these improper fractions into the volume formula
V = 4/1 × 3/2 × 5/2
Any number over one is the same as writing just that number. I write it like this so it's easier to read/understand
Multiply the numerators and denominators separately
V = (4 × 3 × 5)/(1 × 2 × 2)
V = (12 × 5)/(2 × 2)
V = (60)/(4)
V = 60/4
Simplify (Both the numerator and denominator can be evenly divided by 4)
V = (60 ÷ 4)/(4 ÷ 4)
V = 15/1
Any number over one is the same as the numerator
V = 15
