Ava, carter, luke and their dad each mow a different section of their yard. ava mow 1 /12 of the yard, carter mow 2 /12 of the yard ,and luke mows 4/12 of the yard. their dad mows the rest of the yard. how much did his dad now

4. jake needs to score in the top 10% in order to earn a physical fitness certificate. the class mean is 78 and the standard deviation is 5.5. what raw score does he need? z value for top 10% =1.282 how do i get the z value? what is the equation for this? raw score =mean+z*sd = 78+1.282*5.5 = 85.051