Final answer:
To determine the distance a horse runs in 7 minutes at a speed of 3/4 km per minute, multiply the speed by time to get 5.25 km. Option A is correct.
Step-by-step explanation:
To calculate the distance a horse will run in 7 minutes if it runs at a speed of 3/4 km per minute, you simply multiply the speed by the number of minutes.
Multiply the speed (3/4 km/min) by the time (7 min).
(3/4 km/min) × (7 min) = 21/4 km or 5.25 km.
So, the horse will run 5.25 km in 7 minutes, which corresponds to option (a).
To find how many km the horse will run in 7 minutes, we need to multiply the speed of the horse by the time. The horse runs 3/4 km in a minute, so in 7 minutes, it will run:
(3/4 km/minute) × 7 minutes = (3/4 × 7) km = 21/4 km = 5.25 km
Therefore, the horse will run 5.25 km in 7 minutes, which means the answer is a. 5.25 km.