A sugar refinery can produce x tons of sugar per week at a weekly cost of 0.1 x squared plus 9 x plus 1210 dollars. Find the level of production for which the average cost is at a minimum and determine the average cost and marginal cost at that level of production.

the answer is 31.27mph

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

the answer would be d

straight away you can eliminate a and c because not all books contain a scientific skill because some may be fiction. c is also wrong because it saids that the only way children can learn is through books which is incorrect.

b is also wrong because reading can be a scientific skill but not always, therefore it is wrong which leaves you with d, the correct answer since it said that it can children learn.

hope this ! : 3