1/10 4/5 we need common denominaters so
1/10 4(2)/(5)= 8/10
Answer:
8.54 units (3s.f.)
Step-by-step explanation:
Distance between 2 points

Identify the coordinates of the 2 endpoints of the line:
(-5, 5) and (-2, -3)
Using the distance formula above,
length of line segment
![= \sqrt{[5 - ( - 3)]^{2} + [ - 5 - ( - 2)]^{2} } \\ = \sqrt{ {(5 + 3)}^{2} + ( -5 + 2)^{2} } \\ = \sqrt{ {8}^{2} + {( - 3)}^{2} } \\ = \sqrt{73} \\ = 8.54 \: units \: (3 \: s.f.)](https://tex.z-dn.net/?f=%20%3D%20%20%5Csqrt%7B%5B5%20-%20%28%20-%203%29%5D%5E%7B2%7D%20%20%2B%20%5B%20-%205%20-%20%28%20-%202%29%5D%5E%7B2%7D%20%7D%20%20%5C%5C%20%20%3D%20%20%5Csqrt%7B%20%7B%285%20%2B%203%29%7D%5E%7B2%7D%20%20%2B%20%28%20-5%20%2B%202%29%5E%7B2%7D%20%7D%20%20%5C%5C%20%20%3D%20%20%5Csqrt%7B%20%7B8%7D%5E%7B2%7D%20%2B%20%20%7B%28%20-%203%29%7D%5E%7B2%7D%20%20%7D%20%5C%5C%20%20%3D%20%20%5Csqrt%7B73%7D%20%20%5C%5C%20%20%3D%208.54%20%5C%3A%20units%20%5C%3A%20%283%20%5C%3A%20s.f.%29)
Answer:
121
Step-by-step explanation:
Because every one of them shook with each other and one person shook 11 times so 11 into 11 is 121.
Answer:
heeeeeeereeeeeeee
Step-by-step explanation:
Answer:
a) x = 80.40
s = 29.54
b) lower limit = 69.53
upper limit = 91.27
Step-by-step explanation:
The mean price is:

The standard deviation is
![s=\sqrt{\frac{1}{n-1}\sum(x_i-\bar X)^2}=\sqrt{\frac{1}{19}[(50-80.4)^2+...+(70-80.4)^2]} \\\\s=\sqrt{\frac{15,471}{19} }=\sqrt{814.25} =29.54](https://tex.z-dn.net/?f=s%3D%5Csqrt%7B%5Cfrac%7B1%7D%7Bn-1%7D%5Csum%28x_i-%5Cbar%20X%29%5E2%7D%3D%5Csqrt%7B%5Cfrac%7B1%7D%7B19%7D%5B%2850-80.4%29%5E2%2B...%2B%2870-80.4%29%5E2%5D%7D%20%5C%5C%5C%5Cs%3D%5Csqrt%7B%5Cfrac%7B15%2C471%7D%7B19%7D%20%7D%3D%5Csqrt%7B814.25%7D%20%3D29.54)
We have to calculate a 90% CI for the mean.
The z-value for a 90% confidence interval is z=1.645.
The margin of error is:

The 90% CI is
