On the first day of the month, the height of a plant was 9.46 cm. at the end of the month, the plant's height measured 15.3 cm. how many centimeters did the plant grow from the beginning to the end of the month?

Ineed on this question me get the answer

Classify the following number. −9.070707…

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