<span>Look at your table for a Z value of 1.55. The numbers on the far left column are your z values. See the 1.5 row, then move over to the 0.05 column to make it 1.55.
You'll see 0.9394.
That's the area under the normal curve from 1.55 to negative infinity.
But you wanted the area under the curve greater than 1.55.
Take 1-0.9394=0.0606.
You subtract from 1 because you know that the area under the whole curve is 1, so it gives you the area you need.</span>
Answer:
It will take him 18 days to finish the book.
Step-by-step explanation:
It will take 30 more minutes to fill up the pool completely.
2/3 of the pool has been filled in 1 hour. This equates to 60 minutes. This means that in 30 minutes, 1/3 of the pool has been filled. Another 30 minutes and 2/3 of the pool has been filled.
Finally, another 30 minutes will mean that the whole pool is filled.
