A power company calculates a person's monthly bill from the number of kilowatt-hours (kWh), x, used.
The function b(x) = {
0.15%,
0.10 (20 – 400) + 60,
2 < 400
2 > 400
determines
the bill.
How much is the bill for a person who uses 600 kWh in a month?
O A. $80
B. $90
C. $100
O D. $110

(a)

Step-by-step explanation:

Given

The function is given for the bill as per the kilo-watt hours used

for 600 kWh in a month,  is

Substitute 600 for  in

Therefore, the bill for a person is

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

898.1666667

step-by-step explanation:

5389/6 = 898.1666667