While testing new vaccine a lab technician noticed that the number of bacteria reduce by half every minute how long does it take for 3000 material to reduce to 375

What is the 12th term of b(n)=-4-2(n-1)

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?