Answer:
1.125 miles farther
Explanation:
Since Renaldo can roller blade = 9.7 miles per hour
Eliza can roller blade = 8.2 miles per hour.
In 0.75 hour Renaldo can roller blade = 9.7 × 0.75
= 7.275 miles
In 0.75 hour Eliza can roller blade = 8.2 × 0.75
= 6.15 miles
Renaldo will farther from Eliza = 7.275 - 6.15
= 1.125 miles
Renaldo will 1.125 miles farther in 0.75 hour