The mean height of a sample of 15-year-old boys is 175 centimeters, with a standard deviation of 10. for a sample of 15-year-old girls, the mean is 165 centimeters with a standard deviation of 8.
if 8 boys and 8 girls were sampled, the standard deviation of the difference is? ( round to the nearest hundredth).

Question 3 (essay worth 10 points) (03.06 mc) part a: max rented a motorbike at $465 for 5 days. if he rents the same motorbike for a week, he has to pay a total rent of $625. write an equation in the standard form to represent the total rent (y) that max has to pay for renting the motorbike for x days. (4 points) part b: write the equation obtained in part a using function notation. (2 points) part c: describe the steps to graph the equation obtained above on the coordinate axes. mention the labels on the axes and the intervals. (4 points)