The answer is b because 95 confidence is interval for the mean lifespan
<h2>2x+y=2</h2>
Step-by-step explanation:
Let be the point
Let be the point
The equation of the line passing through two points
and is
substituting in the above equation yields
which when simplified gives
which when further simplified gives
Solve the equation for x:
4x+12=48
Subtract 12 from both sides: 4x=36
Divide 4 from both sides to isolate x: x=9
Its 400 because 363 is closer to 400 than 300