Anne thinks of a number. Brenda also thinks of a number. Anne multiplies her number by Brenda's
and then squares the answer. If a represents Anne's
number and b represents Brenda's number, which
expression represents her answer?

Anne's number is a

Brenda's number is b

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Anne multiplies her number by Brand's :

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Then squares the answer :

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The expression which represents her answer is :

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).