It can't be A, B, nor C because some of the equations wouldn't have a straight line if displayed in a graph. For example A has a square root symbol and b and a have an exponent they would create a perebula where that would mean the equations would not make a straight line. However, Choice d doesn't have any exponents, or square root symbols meaning the equation could slope up or down in a STRAIGHT line in a graph.
I believe it is the blue one but not 100% sure
Answer: (0.00306,0.00334)
Step-by-step explanation:
Given : Sample size : n= 420000
The number of users developed cancer of the brain or nervous system =134
Then , the proportion of users developed cancer of the brain or nervous system :
Significance level : 
Critical value : 
The confidence interval for population proportion is given by :-
Hence, the 90% confidence interval estimate of the percentage of cell phone users who develop cancer of the brain or nervous system is (0.00306,0.00334).
Part A:
Area of a circle is pi*radius^2
a=3.14*1^2
a=3.14
Part B:
Area of a rectangle is length*width
a=5*7
a=35
Part C:
Area of the shaded part would be the area of the rectangle - the area of the circle
a=35-3.14
a=31.86
Answer: David made 120 drawings while at summer camp
