please help me with 7 and 10!! i’ll mark you brainliest:)

Answer:
7. 18,480 feet
10. (a.) 1.5 (b.) 150% Sorry I don't know the answers to c & d.
Step-by-step explanation:
7. [tex]\frac{3.5 miles}{1 ft.}[/tex] × [tex]\frac{5,280 ft.}{1 mile}[/tex] = [tex]18,480ft.[/tex]
Hope this helps!