Which natural phenomenon is the best example of periodic behavior

Sally has a savings account. She deposited $200 into her savings account last year and has been taking out $10 monthly to go to the movies. Sally now was $80 in her account. How many months has she been withdrawing money?

Sara's paper airplane flew 8 1/2 yards. Jason's flew 8 2/3 yards. Michael's flew 8 1/4 yards and Denise's flew 8 1/6 yards. whose flew the farthest? explane how you found your answer.

Mario has $15. If he spends $6.25 on admission to the ice skating rink,$2.95 to rent skates, and $1.65 each for hot chocolates, how much money will he have left?

Meg has a new bookcase for her bedroom with 6 shelved meg has 50 books about how many books will fit on each shelf

How many feet in 6 yards

How do you multiply a mixed fraction by a regular fraction

Roger has 4 gallons of juice. He puts the same amount of juice into each of 5 pitchers. How many gallons of juice are in 1 pitcher?

400 students were randomly sampled from a large university, and 289 said they did not get enough sleep. Conduct a hypothesis test to check whether this represents a statistically significant difference from 50%, and use a significance level of 0.01.

Round off the number of seconds in an hour to 1 significant figure number of seconds = 3600

The sum of two numbers is 50. Two times the smaller number exceeds the larger number by 31. Find the numbers.