I can help what are the problems
Find the ratio of the similar known sides:
1.34/2 = 0.67
The smaller triangle is 0.67 the size of the larger one.
Multiply the similar sides by the ratio:
DE = 4 x 0.67 = 2.68
FE = 3 x 0.67 = 2.01
You would run 2.5/3 miles or .833 miles
There are a total of 900 students at Molly’s school. 810 is 90% of 900. 90% of students did not wear a silly hat.