Answer:
28.26ft
Step-by-step explanation:
A=πr^2
π*3^2=28.27433
28.26
I’m guessing A? Sorry if it’s wrong!
The probability that student scored more than 850 we shall proceed as follows:
z=(x-μ)/σ
where:
x=850
μ=750
σ=50
thus
z=(850-750)/50
z=2
thus
P(x>850)=1-P(x<850)=1-P(z<2)=1-0.9772=0.0228
Answer: P(x>850)=0.0228
