This can be solved using the formula for t test which is = x - mu over standard deviation divided by the square root of the number of samples. In this case, it is 1185 - 1200 over 70 divided by square root of 100 which give us a value of 2.14 which is equal to .9839 in area. Only rarely, just over one time in a hundred tries of 100 light bulbs, would the average life exceed 1200 hours.
The y intercept would be 1
The slope would be down 2 left 3
The coordinates of the focus are (3,0)
Answer:
121b+22
Step-by-step explanation:
Ok so first you distribute the 11 because its outside the ( ).
(11*11b) + (11*2)
121b+22
Since you don't know what b is you can't go any further, there for your done.
D is the answer
40050 divided by 3.14 is 12754.77707