Identify the pairs of supplementary angles in the figure. A) ∠1 and ∠3; ∠2 and ∠8; ∠6 and ∠7; ∠5 and ∠8 B) ∠1 and ∠2; ∠4 and ∠6; ∠6 and ∠7; ∠3 and ∠8 C) ∠3 and ∠5; ∠1 and ∠8; ∠2 and ∠3; ∠2 and ∠8 D) ∠1 and ∠2; ∠1 and ∠8; ∠2 and ∠3; ∠3 and ∠8

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

The length of a field is 100 yards and its width is 75 yards. if 1 inch represents 25 yards, what would be the dimensions of the field drawn on a sheet of paper?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min