A calculator which was bought for Rs.450,was sold at Rs.495.What was the gain percent?​

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60

Select the number of ways in which a line and a circle can intersect

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.