Tracey’s dog weighed 38.5 pounds. Tracey weighed her dog and found that the dog lost 1/2 pound each month for three months. Tracey used the expression 38.5 + 3(0.5) to find her dog’s weight at the end of the 3 months. What is the error in Tracey’s expression?
A. Tracey’s dog weighed more in 3 months and the expression she wrote will result in a lower weight.
. Tracey should have added 3 and 0.5 instead of multiplying to find the dog’s new weight.
C. Tracey should have multiplied 3 and 38.5 and then subtracted 0.5 to find the dog’s new weight.
D. Tracey’s dog is losing weight so she should have used -0.5 instead of 0.5 in the expression.