What is the diameter of a circle with a radius of 3.5 cm

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

Can someone pls ! pls answer all. no explanation needed..

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.