Answer:
And the 95% confidence interval would be given (0.107;0.227).
Step-by-step explanation:
Information given
number of trees with signs of disease
the sample selected
the proportion of trees with signs of disease
The confidence interval for the true proportion would be given by this formula
For the 95% confidence interval the significance is 
and 
, and the critical value would be
And replacing we got:
And the 95% confidence interval would be given (0.107;0.227).
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#6
Yes
Direct variation because Time increases cupcakes increases and vice versa
#B
Constant of proportionality represents the amount of time required per cupcakes
#7
Yes we can find it
We have to check the x and y values of the ordered pairs (x,y)
If y is decreasing with respect to increase in x then it's inverse variation
Answer:
#2
Step-by-step explanation:
Answer:
x= 200
Step-by-step explanation:
The given equation is:
1/5 x - 2/3 y = 30
The value of y is 15
Put the value of y in the given equation:
1/5 x - 2/3(15) = 30
1/5 x- 10 = 30
Take the L.C.M of the denominator
x-50/5 = 30
Move the denominator to the R.H.S
x-50 = 30*5
x-50 = 150
Combine the like terms
x= 150+50
x = 200
The value of x is 200...
