PLEASE HELP If I have 30 grand in the bank I will pull it out to spend on 25 doberman dogs, and each dog costs 6000 dollars each how much will I have left over?

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