Answer:
2.5%
Step-by-step explanation:
It is given that:
lifespans of seals in a particular zoo are normally distributed. The average seal lives 13.8 years and the standard deviation is 3.2 years.
We want to use the empirical rule to estimate the probability of a seal living longer than 7.4
Let's calculate the z-score of 7.4 using
![z = \frac{x - \mu}{ \sigma}](https://tex.z-dn.net/?f=z%20%3D%20%20%5Cfrac%7Bx%20-%20%20%5Cmu%7D%7B%20%5Csigma%7D%20)
![z = \frac{7.4 - 13.8}{3.2}](https://tex.z-dn.net/?f=z%20%3D%20%20%5Cfrac%7B7.4%20-%2013.8%7D%7B3.2%7D%20)
![z = - 2.00](https://tex.z-dn.net/?f=z%20%3D%20%20-%202.00)
According to empirical rule, 95% of the distribution is within 2 standard deviations, i.e (-2 to 2)
So from (-2 to 0), we would have 47.5%
Since we are looking for the area to the left of -2.00 we subtract this from 50%
to get 2.5%
Flower bed A:
circumference= 2 x pi x r= 2x pi x10/2
=10pi feet
Area= pi x r^2=25pi square feet
Flower bed B:
circumference=12 pi feet
Area=36 pi square feet
Given:
Jonny and Faheem share some money in the ratio 3:5.
Faheem gets £12 more than Jonny.
To find:
The amount that Jonny gets.
Solution:
Jonny and Faheem share some money in the ratio 3:5.
Let Jonny and Faheem get 3x and 5x.
Different between their amounts is
![5x-3x=2x](https://tex.z-dn.net/?f=5x-3x%3D2x)
Faheem gets £12 more than Jonny. It means the difference between their amounts is equal to £12.
![2x=12](https://tex.z-dn.net/?f=2x%3D12)
![x=\dfrac{12}{2}](https://tex.z-dn.net/?f=x%3D%5Cdfrac%7B12%7D%7B2%7D)
![x=6](https://tex.z-dn.net/?f=x%3D6)
The amount that Jonny gets is
![3x=3(6)](https://tex.z-dn.net/?f=3x%3D3%286%29)
![3x=18](https://tex.z-dn.net/?f=3x%3D18)
Therefore, Jonny gets £18.
Answer:
I think the image above will help you a lot.
They will all be able to park and have 4 empty spaces left. 34 x 6 = 204