The activity sheet is asking you to determine whether each of the pairs of quantities is a rate, and if it is, convert it into a unit rate. Here's an explanation for each of the pairs:

1. 5 humans to 10 hands
   Not a rate (N) – This is a simple ratio because it's just a count of humans to their hands, not a measure per unit of time or quantity. It doesn’t require conversion to a unit rate.

2. ₱300 per 2 hours of work
   Rate (R) – This is a rate because it's money per time unit (₱/hour).
   Unit Rate: ₱300 ÷ 2 = ₱150 per hour.

3. ₱300 to 2 kg of rambutan
   Rate (R) – This is a rate because it's cost per unit of weight (₱/kg).
   Unit Rate: ₱300 ÷ 2 = ₱150 per kg.

4. 20 meters in 5 seconds
   Rate (R) – This is a rate because it's distance per time (meters/second).
   Unit Rate: 20 ÷ 5 = 4 meters per second.

5. 24 miles in every 8 hours
   Rate (R) – This is a rate because it’s distance per time (miles/hour).
   Unit Rate: 24 ÷ 8 = 3 miles per hour.

6. ₱30,000 in 3 square meters
   Rate (R) – This is a rate because it’s money per area (₱/square meter).
   Unit Rate: ₱30,000 ÷ 3 = ₱10,000 per square meter.

7. 60 seconds per minute
   Not a rate (N) – This is not a rate because it's a conversion of time, not two different types of quantities.

8. 6 inches in half a ruler
   Rate (R) – This is a rate because it's length per unit of measurement (inches per ruler fraction).
   Unit Rate: 6 ÷ 0.5 = 12 inches per full ruler.

9. **6 apples in 3