Answer:
C
Step-by-step explanation:
Tides can be predicted far in advance and with a high degree of accuracy. Tides are forced by the orbital relationships between the Earth, the moon and the Sun. ... The predictability of planetary motion means that we can also reconstruct tides in the past.
Answer:
The cost of one cricket bat is $370, while the cost of one cricket ball is $185.
Step-by-step explanation:
Let's identify what we already know:
1) Mr. Lenny paid a TOTAL of $1480.00 for 4 cricket balls, and two cricket bats.
2) The cost of one cricket bat is twice as much as a cricket ball.
We can create an initial equation:
(4 times x) + (2 times y) = $1480.00
x is the price of one cricket ball, while y is the price of one cricket bat. Considering how the problem is set up, I know the 4 balls should add up to the same price as two bats.
So, the four balls should equal half of $1480, which is $740, and the two bats should also equal $740.
Calculate it out, and you'll find that one cricket bat equals $370, while one ball equals $185.
I added an attachment. Hope it helps you!!! :)
Answer: 0.9746
Step-by-step explanation:
Given : A normally distributed population has a mean of 250 pounds and a standard deviation of 10 pounds.
i.e.
![\sigma=10](https://tex.z-dn.net/?f=%5Csigma%3D10)
Sample size : n= 20
Let
sample mean values.
Then, the probability that this sample will have a mean value between 245 and 255 be
![P(245](https://tex.z-dn.net/?f=P%28245%3C%5Coverline%7Bx%7D%3C255%29%20%3DP%28%5Cdfrac%7B245-250%7D%7B%5Cdfrac%7B10%7D%7B%5Csqrt%7B20%7D%7D%7D%3C%5Cdfrac%7B%5Coverline%7Bx%7D-%5Cmu%7D%7B%5Cdfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%7D%3C%5Cdfrac%7B255-250%7D%7B%5Cdfrac%7B10%7D%7B%5Csqrt%7B20%7D%7D%7D%29%5C%5C%5C%5C%3DP%28-2.236%3Cz%3C2.236%29%5C%20%5C%20%5B%5Cbecause%20%5C%20z%3D%5Cdfrac%7B%5Coverline%7Bx%7D-%5Cmu%7D%7B%5Cdfrac%7B%5Csigma%7D%7B%5Csqrt%7Bn%7D%7D%7D%5D%5C%5C%5C%5C%3DP%28z%3C2.236%29-P%28z%3C-2.236%29%5C%5C%5C%5C%3DP%28z%3C2.236%29-%281-P%28z%3C2.236%29%29%5C%20%5C%20%5B%5Cbecause%20P%28Z%3C-z%29%3D1-P%28Z%3Cz%29%5D%5C%5C%5C%5C%3D2P%28z%3C2.236%29-1%5C%5C%5C%5C%3D%202%28%200.9873%29-1%5C%20%5C%20%5B%5Ctext%7BBy%20z-table%7D%5D%5C%5C%5C%5C%3D0.9746)
Hence , the probability that this sample will have a mean value between 245 and 255 is 0.9746 .