Answer:
atleast 385
Step-by-step explanation:
Given that an electrical power company is looking to expand into a new market. Before they commit to supplying the new area with electricity, they would like know the mean daily power usage for homes there.
Population std deviation = 
Sample size =
STd error of sample mean = 
Margin of error for 95% would be Critical value ( std error)
Here since population std dev is known we can use Z critical value= 1.96
Sample size should be atleast 385
Step-by-step explanation:
circumference =pi × diameter
=(22/7)×2.2
=6.914ft
Answer:
A
Step-by-step explanation:
It is the only equation given with multiple exponents and terms
The shaded area = 2 * area of the segment in each circle
area of 1 segment = area of sector - area of triangle formed by the 2 radii
= 1/2 * 4^2 * pi/3 - 2*2 sqrt3
= 8 pi/3 - 4 sqrt3
so area of shaded part = 2 * the above
= 16pi/3 - 8 sqrt3
Answer: the number of students participating this year is 57.
Step-by-step explanation:
5% of 60 is 3.
60-3=57
I believe this is correct :)
