Question

what are possible rates for a rescue team to search a forest? check all the answers that have the right type of units.
14 acres/hour
0.0259 acres/mile
0.0774 minutes
58 acres
0.0031 days per acre

what are possible speeds for the trommedary kul_6k to travel? check all the answers that have the right type of units.
0.0149 seconds/inch
0.2 seconds/foot
0.00065 centimeters
2 inches per year
75.7 minutes

what are possible ratios between skiers and ski instructors? check all the answers that have the right type of units.
6.2 skiers per ski instructor
0.16 ski instructors/skier
62.6 skiers per year
0.2 ski instructors/second
10 skiers

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Explanation:

1. For forest search rates: A rate for area searched needs a time unit paired with area. Valid options have area per time or time per area.
2. For travel speeds: Speed is a rate of distance over time (or time over distance). Valid options pair distance and time units.
3. For skiers to instructors ratio: The ratio must compare the count of skiers to instructors (or vice versa) without unrelated units like time.

Answer:

Forest search rates:

14 acres/hour
0.0031 days per acre

Trommedary travel speeds:

0.0149 seconds/inch
0.2 seconds/foot
2 inches per year

Skiers to instructors ratio:

6.2 skiers per ski instructor
0.16 ski instructors/skier