What are the answers to this?

In a circle, a 45° sector has an area of 32π cm2. what is the radius of this circle? 32 cm 12 cm 16 cm 8 cm

Which of the following would be a good name for the function that takes the weight of a box and returns the energy needed to lift it?

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i