A 38 gram sample of substances that’s used to sterilize surgical instruments has a k-value of 0.113. Find the substances half-life, in days. Round your answer to the nearest tenth.

Mr. jones determined that the equation y = 98 - 16/5 x could be used to predict his students' unit test scores, based on the number of days, x, a student was absent during the unit. what was the meaning of the y-intercept of the function? (by the way the 16/5 is a )