the answer is 7Г2÷2 (the first one)
The student made a mistake in Line 1: AC=2, DF=2 AC ≅ DF .
There's missing information. What does f(x) approach as x approaches negative infinity and infinity?
40000 = 1 second
Multiply both sides by 60 to see how much in one minute
2,400,000 = 1 minute