Which natural phenomenon is the best example of periodic behavior

Fifteen married couples are at a dance lesson. Assume that (male-female) dance pairs are assigned at random. (a) What is the number of possible assignments? (b) What is the probability that each husband ends up dancing with his wife?

State a conclusion that seems reasonable. Your teacher has given a pop quiz on seven consecutive Mondays. Today is Monday. Conclusion:

5 (2x-4) = 45find what x equals

Laden has 7/9 pounds of candy. If he gives 1/4 pound of candy to his friend, what fraction of a pound of candy will he have left?

You start at (10, 2). you move up 2 units and down 4 units. where do you end?

There are 378 million children who probably believe in Santa Claus. but some have been naughty so they don't get presents. however, once all the math is done Santa still has to stop in 91.8 million homes.

How many times greater is the value of the digit 4 in 4,560 than in 241?

Dan learned the mass of an electron is about 9.1*10⁻³¹ while the mass of a proton is about 1.7*10⁻²⁷. He thinks electrons have a greater mass than protons because 9.1 is greater than 1.

A developer wants to enclose a rectangular grassy lot that borders a city street for parking. If the developer has 288 feet of fencing and does not fence the side along the street, what is the largest area that can be enclosed? A. 20,736 ft2 B.

Twelve times the sum of a number and 2 is equal to 36. what is the number