easy · Enhanced ACT science
A car's speed was measured every 10 seconds: 10s: 20 mph; 20s: 30 mph; 30s: 40 mph; 40s: 35 mph.
According to the data, what was the car's speed at 30 seconds?
- 20 mph
- 30 mph
- 40 mph
- 35 mph
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