Please help me answer this with the correct answer :) Explain your answer

I will give braisnlt :)

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)

Use the equation and type the ordered-pairs. y = 2 ^x

Miguel has 334 baseball cards and 278 football cards. he says, i have 612 cards in all. is that reasonable? explain using the words round and estimate.