WILL GIVE BRAINLIEST: ALGEBRA Phil and Claire want to tile a bathroom. It took Phil 18 hours to tile a bathroom by himself. When Clair did it by herself, it took her 15 hours. How long would it take Phil and Clair to tile the bathroom if they work together? If needed, round to the nearest hundredth.

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.

What is the correct answer?urgent you