suppose an initial population of 1000 cells grows to 17,000 cells in two hours. What is the doubling time of this population

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

If f(x)=-3x+2 and g(x)=-7x-2, which point represents f(x)=g(x)?

Find an equation of the line that has intercepts (1,0) and (0,4).