Explain why an circle would have an infinite number of lines of reflection that would carry the circle into itself?

Which multiplicative property is being illustrated below? (type commutative, associative, or identity) 5 × 2 × 4 = 2 × 5 × 4

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.