Final answer:
Jebb is 6 3/8 feet tall, calculated by multiplying 1 1/2 times the height of the shortest sixth-grade girl who is 4 1/4 feet tall, resulting in 6 3/8 feet.
Step-by-step explanation:
To find out how tall Jebb is, we need to calculate 1 1/2 times the height of the shortest girl in the sixth grade who is 4 1/4 feet tall. First, we convert 1 1/2 to a mixed number with the same denominator as 4 1/4 for easier multiplication.
1 1/2 = 3/2
4 1/4 = 17/4
Now multiply the two fractions.
(3/2) * (17/4) = 51/8
When we convert the improper fraction 51/8 back to a mixed number, we get:
51 ÷ 8 = 6 with a remainder of 3.
So, 51/8 is equivalent to 6 3/8.
Therefore, Jebb is 6 3/8 feet tall, which matches option A).