On March 27, 2004, the United States successfully tested the hypersonic X-43A scramjet, which flew at Mach 7 (seven times the speed of sound) for 11.0 seconds. (A scramjet gets its oxygen directly from the air, rather than from fuel.)
1-At this rate, how many minutes would it take such a scramjet to carry passengers the approximately 5000 from San Francisco to New York? (Use 331 for the speed of sound in air.)
2-How many kilometers did the scramjet travel during its 11.0 second test?