Answer:
10) 3. 88 mi/hr
11) 68. 57 mi/hr
Step-by-step explanation:
10. Running
Average speed formula: v= d/t
givens: 3 2/5 miles and 7/8 hour
• change 3 2/5 to an improper fraction
17/5
• divide the givens by receprocating 7/8 and changing the sign to multiplication
17/5 × 8/7
= 136/35
= 3. 88 mi/hr
11. Driving
Speed formula: s= d/t
givens: 120 miles and 1 3/4 hours
• change 1 3/4 to an improper fraction
7/4
• divide the givens by receprocating 7/4 and changing the sign to multiplication
120/1 × 4/7
= 480/7
= 68. 57 mi/hr
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