Speed Rates 7E79C8
1. **State the problem:** We are given two speed lines for Ariana and Glenn and need to complete ratio/rate tables, find unit rates, list points, and answer distance/time questions.
2. **Complete Ariana's ratio/rate table:** Given points: (1,8), (2,15), (5,38), (6,45), (8, ?)
- To find miles at 8 hours, find the rate or use linear interpolation/extrapolation.
3. **Calculate Ariana's unit rate (pace):** Unit rate = miles per hour = $\frac{\text{miles}}{\text{hours}}$
- Using (1,8), unit rate = 8 miles/hour approximately.
- Check with (2,15): $\frac{15}{2} = 7.5$ miles/hour, close to 8.
- Average unit rate ~7.6 miles/hour.
4. **Find miles at 8 hours for Ariana:** Using approximate unit rate 7.6 miles/hour,
$$8 \times 7.6 = 60.8$$ miles.
5. **Complete Glenn's ratio/rate table:** Given points: (1,5), (2,10), (5,25), (7,35), (8, ?)
- Find miles at 8 hours using unit rate.
6. **Calculate Glenn's unit rate:** Using (1,5), unit rate = 5 miles/hour.
- Check with (2,10): $\frac{10}{2} = 5$ miles/hour consistent.
7. **Find miles at 8 hours for Glenn:**
$$8 \times 5 = 40$$ miles.
8. **List two additional points on Ariana's line:**
- Using unit rate 7.6, points at (3, 22.8), (4, 30.4).
9. **List two additional points on Glenn's line:**
- Using unit rate 5, points at (3, 15), (4, 20).
10. **After 3 hours, how much farther has Ariana gone than Glenn?**
- Ariana: $3 \times 7.6 = 22.8$ miles
- Glenn: $3 \times 5 = 15$ miles
- Difference: $22.8 - 15 = 7.8$ miles
11. **How much longer will it take Glenn to walk 24 miles than Ariana to run 24 miles?**
- Time = distance / rate
- Ariana's time: $\frac{24}{7.6} \approx 3.16$ hours
- Glenn's time: $\frac{24}{5} = 4.8$ hours
- Difference: $4.8 - 3.16 = 1.64$ hours
12. **Solve 13 ÷ 18:**
$$\frac{13}{18} \approx 0.722$$
13. **Solve 28,681 + 9,478:**
$$28,681 + 9,478 = 38,159$$
14. **Solve 78 ) 3,734 (division):**
- $78 \times 47 = 3,666$ remainder $68$
- Quotient is 47 remainder 68
**Final answers:**
- Ariana's miles at 8 hours: 60.8
- Ariana's unit rate: approx 7.6 miles/hour
- Additional points Ariana: (3,22.8), (4,30.4)
- Glenn's miles at 8 hours: 40
- Glenn's unit rate: 5 miles/hour
- Additional points Glenn: (3,15), (4,20)
- After 3 hours, Ariana is 7.8 miles farther
- Glenn takes 1.64 hours longer to walk 24 miles
- 13 ÷ 18 ≈ 0.722
- 28,681 + 9,478 = 38,159
- 3,734 ÷ 78 = 47 remainder 68