A=(vf-vi)/t solve for vf

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent

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