Bacteria in a petri dish is experiencing exponential decay. There are 1,000 bacteria at the start and 400 bacteria a day later.
1. The percent decrease is
percent, 2. and the decay factor is.
1. 60, 100, 40
2. 1.0, 0.4, 0.6
PLEASE HELP

Use the normal approximation to the binomial distribution to answer this question. fifteen percent of all students at a large university are absent on mondays. if a random sample of 12 names is called on a monday, what is the probability that four students are absent?

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?