1. A Geiger counter measures 750 counts in 5.0 min. a. Determine the average counting rate per minute, the standard deviation of the counting rate. b. Find the relative error in the average counting rate. c. How long would you want to count to get a relative error of 1%

Aboat has a speed of 9 mph in calm water. it takes the boat 4 hours to travel upstream but only 2 hours to travel the same distance downstream. which equation can be used to find c, the speed of the current? 2(9 – c) = 4(9 + c) 9 + c = 4(9 – c) 9 – c = 2(9 + c) 4(9 – c) = 2(9 + c)