A
...........................
Answer:
10
Step-by-step explanation:
12/20 = 6/x
Using cross products
12*x = 20*6
12x = 120
Divide by 12
12x/12 = 120/12
x = 10
Answer:
x^2-2x-4=0
Δ=2^2-4*1*(-4)
Δ=4+16=20
VΔ=2V5
x1= (2+2V5)/2=1+V5
the answer is D
Step-by-step explanation:
The dimensions can vary. Here is a picture of a triangular prism with a right-triangle base.
The margin of error of the random selection is 0.29
The given parameters are:
--- the sample size
--- the standard deviation
--- the mean
--- the confidence level.
The margin of error (E) is calculated as follows:

So, we have:


The z-value for 90% confidence level is 1.645.
Substitute 1.645 for z


Take square roots

Multiply

Approximate

Hence, the margin of error is 0.29
Read more about margin of error at:
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