It looks like you are missing some information to solve this problem. The equation to solve speed is:
s=d/t. But, you don't even need to remember that. Just look at the format your answer will take - kilometer per hour or kph. This means we need to divide the kilometers traveled by the hours taken for the trip. You have the hours, but not the kilometers. Is there more text that tells you how many kilometers away from the Grand Canyon Julie's family lives? This would be crucial information. You can't solve it without that information. But, let's use an example amount so that you know how to do it if you find the necessary information. So, let's pretend that you see that Julie lives 3,350 kilometers away from the Grand Canyon. You would take the distance in kilometers and divide it by the time in hours: 3,350÷32 = 104.6875. The question says to round your answer to the nearest tenth of a kilometer per hour, so your final answer would be 104.7 kph. Again, you'll have to do this math with whatever the distance actually is, just divide it by 32 and round to the nearest tenth. Let me know if you have more questions. :)