Multiplying decimals

7.13 x 5.5 

• 39.215
• 3.9215
• 392.15
• 3921.5

5.78 x 3.5

• 0.223
• 2.23
• 22.3
• 20.23

3.5 x 4.92

• 17.32
• 17.22
• 1.72
• 0.1722

One kilometer is about .62 mile. It is 12 kilometers from Noah's house to tthe ice skating rink. About how many miles is it from Noah's house to the ice skating rink? 

• 74.4 miles
• 7.44 miles
• 0.744 miles
• 84.4 miles

 Jackie rode her bike around Capaha Park last week. The trail is 8.54 miles long. If she rode around the park 4 times last week, how many miles did she travel in all?

• 3.41 miles
• 8.54 miles
• 34.16 miles
• 341.6 miles