The probability that a lab specimen contains high levels of contamination is 0.12. a group of 4 independent samples are checked. round your answers to four decimal places (e. g. 98.7654). (a) what is the probability that none contain high levels of contamination

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance