Find the perimeter and area of the sector of a circle of radius 9cm with central angle 35°​

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"