Gina ran two laps around the track in 99 seconds. How long did it take her to run each lap if she ran the first one 8.5 meters per second and the second lap at 8 meters per second.

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

100 points? me its important ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota