How the position of the decimal point change in a quotient as you divide a number by 10, 100, and 1,000

Name the type of angle shown.calculation tip: common types of angles are zero, straight, right, acute, or obtuse.

What is the binomial expansion of (2x-3)^5

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.