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:
12
Step-by-step explanation:
8x1+8x0.5
8+4
12
12$ is the total cost
Answer:
10+8+6=24 the ratio of taking the biographies to the science books are: 4:3
Step-by-step explanation:
That is the answer because 10+8+6= total 24 books
ratio of biographies= 24:8=3:1
ratio of science fiction= 24:6= 4:1
hence according axiom 1 ab × Ac= aa × BC
3:1×4:1= 4:3
HOPE THIS HELPSBYOU✌️
Answer:
I believe that it is the first one.
Step-by-step explanation:
All you have to do is add those two numbers given and subtract by 180. all of the angles shall add up to 180 if not then you dic something wrong
