# 15.12: Exercises

- Page ID
- 16885

Exercise \(\PageIndex{1}\)

*Assume that we execute the following assignment statements:*

width = 17 height = 12.0 delimiter = '.'

*For each of the following expressions, write the value of the expression and the type (of the value of the expression).*

*width/2**width/2.0**height/3**1 + 2 * 5**delimiter * 5*

*Use the Python interpreter to check your answers.*

Exercise \(\PageIndex{2}\)

*Practice using the Python interpreter as a calculator:*

*The volume of a sphere with radius**r*is 4/3 π*r*^{3}. What is the volume of a sphere with radius 5? Hint: 392.7 is wrong!*Suppose the cover price of a book is $24.95, but bookstores get a 40% discount. Shipping costs $3 for the first copy and 75 cents for each additional copy. What is the total wholesale cost for 60 copies?**If I leave my house at 6:52 am and run 1 mile at an easy pace (8:15 per mile), then 3 miles at tempo (7:12 per mile) and 1 mile at easy pace again, what time do I get home for breakfast?*