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.
Answer:
0.067 mps should be your answer
Step-by-step explanation:
3/4 of children mar buying lunch because if u divide 27 by 9 you get three, which is the numerator. Then you divide 36 by 9 to get 4, which is the demoninator. making the simplied version 3/4
Answer:
Length: 19 feet
Width: 10 feet
Area: 190 feet
Step-by-step explanation:
This is a question about ratio.
Length: let 
be the actual length.
Width: let 
be the actual width.
Area: A = xy
It is already in identity.
cos (x - y) - cos (x + y) = 2 sin(x) sin (y)
