In two succesive years, the population of a town is increased by 15% and 20%. What percent of its population is increased after two years

The production line where you work can assemble 5 appliers every 30 minutes at this rate how long should it take the line to assemble 125 amplifiers

If f(x)=2x+2and g(x)=x^3, what is (g•f)(2)

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?