Walter walked 15.5 block from his house to work. It took him 35 minutes. What is his rate in blocks per hour

For this case we first calculate the rate in blocks per minutes.

rate = (15.5) / (35) = 0.443 blocks per minutes.

Then, we can go to blocks per hour.

Remember: 1h = 60min.

rate = 0.443 * (1/60) = 0.00738 blocks per hour.

answer

his rate in blocks per hour is 0.00738 blocks per hour.