Direction: Answer the following with solution in paper:

1. How much of a 25% acid solution should be added with 5 liters of a 15% acid solution to obtain a 20% solution?

A. 5 Liters

B. 6.25 Liters

C. 8 Liters

D. 4 Liters

2. Students are going to a football game 135 miles away in two cars. The first car leaves on time and travels at an average speed of 45 miles per hour. The second car starts half an hour later and travels at an average speed of 55 miles per hour. How far from the stadium will it take the second carload of students to catch up and be at the same distance or at parallel with the first car?

A. 10.50 miles

B. 11.25 miles

C. 13.75 miles

D. 23.75 miles

3. Rodrigo is 28 years older than Sarah today. Sixteen years from now, Rodrigo will be twice as old as Sarah. How old is Rodrigo today?

A. 38 y.o.

B. 40 y.o

C. 56 y.o

D. 28 y.o