Jethro walked at an average speed of 3 miles per hour for 2 hours. randy walked at an average of 4 miles per hour for 3 hours. which explanation correctly tells how to calculate the total number of miles the two boys walked? a. step 1 divide: 3 ÷ 2. step 2 divide: 4 ÷ 3. step 3 subtract the two quotients. b. step 1 divide: 3 ÷ 2. step 2 divide: 4 ÷ 3. step 3 add the two quotients. c. step 1 multiply: 3 × 2. step 2 multiply: 4 × 3. step 3 add the two products. d. step 1 multiply: 3 × 2. step 2 multiply: 4 × 3. step 3 subtract the two products.