Every year, a lake becomes more polluted, and 2% fewer organisms can live in it. If in 2010 there are one million organisms, determine the number of organisms in the lake 5 years later. Let i = 0 represent the year 2010.
a. 922,368 organisms remaining
c. 903,921 organisms remaining
b. 941,192 organisms remaining
d. 960,400 organisms remaining

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?