At the grocery store, you can purchase ground coffee in either a medium or large size. A medium ground coffee is 30 ounces and cost $7.99. A large ground coffee is 45 ounces and costs $12.99. Calculate the unit rate (in price per ounce) for the medium coffee and enter it in the first blank. Calculate the unit rate (in price per ounce) for the large coffee and enter it in the second blank. Round your answers to the nearest hundredth. Determine which size is the best value and either enter "medium" or "large" in the third blank. Question 3 options:

Given: ab ≅ cd and ad ≅ bc prove: abcd is a parallelogram. statements reasons 1. ab ≅ cd; ad ≅ bc 1. given 2. ac ≅ ac 2. reflexive property 3. △adc ≅ △cba 3. ? 4. ∠dac ≅ ∠bca; ∠acd ≅ ∠cab 4. cpctc 5. ∠dac and ∠bca are alt. int. ∠s; ∠acd and ∠cab are alt. int. ∠s 5. definition of alternate interior angles 6. ab ∥ cd; ad ∥ bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3? triangle angle sum theorem sas congruency theorem sss congruency theorem cpctc