On an Idaho map, 1" represents 20 miles. If the distance on the map between two towns on the river measures 2 5/8" how many miles apart are the towns? ANSWERS:

A. 42 1/2 miles
B. 45 miles
C. 47 5/8 miles
D. 52 1/2 miles
E. 40 miles

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?