Answer:
BC = 35 units
Step-by-step explanation:
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Step-by-step explanation:
Probability of large hot drink = 22/ 100 = 11/50
Plot the points at
(-9,-5)
And
(-3,-5)
This looks right
Answer: 68
Step-by-step explanation:
Formula for sample size when prior estimate of population proportion (p) is available: 
, where z*= critical-value.
E= Margin of error.
Let p be the population proportion of trees are infected with the citrus red mite.
As per given , we have

E= ± 0.08
The critical z-value corresponding to 90% confidence level = z*=1.645
Substitute all the values in the above formula , we get
Required sample size :

[Rounded to next integer.]
Thus, the minimum sample size should be taken =68