Use appropriate significant figures

3. How many centimeters are there in 5.14 feet? 4. How many meters are there in 3.14356 miles? 5. 7 + 0.218 = 6. 18 - 21.7 = 7. 78/31.2 = 8. 12 X 1.2 = 9. How do you express 15000 with three significant figures in scientific notation? 10. Two points in a rectangular coordinate system have the coordinates (1.8, 3.0) and (4.5, -1.7), where the units are in meters. What is the distance between these two points