SallyMay subscribes to an internet service provider that promised 40 megabytes per second (MB/s) of internet download speed when she signed on. Once the service was provided, she tested her download speed for a 24-hour period. The following graph shows the test result. Define the function B(t) to model the download speed, in MB/s, where t is the number of hours since 0:00 a.m. (midnight) on the day the test was conducted. 45 Download Speed in MB/s 40 35 30 25 20 15 10 5 Hours Since 0:00 a.m. 0 2 4 6 8 10 12 14 16 18 20 22 24 To find out when the download speed was 30 MB/s, which equation should you solve? How many solutions would you have?