The area of a circle is 80 square inches. find the area of the sector whose central angle is 45 degrees

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

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.

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