Write the prime factorization of the
numerator and denominator of 24/60. Then reduce.

24/60 = 2/5

Step-by-step explanation:

the greatest common factor is 12

divide numerator and denominator by 12 to get 2/5

24 = 2³ · 3

60 = 2² · 3 · 5

which prime fractors are common to each?

two 2's and one 3; multiply these together to get 2 x 2 x 3 = 12

maximum area = xy = (16)(32) = 512 ft2

to maximize the area of the garden, the side of the fence parallel to the side of the house should be 32 ft long, and the other two sides should both have length 16 ft.'

source

it is a. 4.2 because 7.6-3.4 gets the remaining length of 4.2. i might be wrong but i am pretty sure this is the answer.