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2 votes
2 votes
An electric company calculates a person's monthly bill from the number of

kilowatt-hours (kWh), x, used.
The function
b(c)
{
0.102,
X is greater than or equal to 200
0.15(x – 200) + 20, 2 > 200
determines the
bill.
How much is the bill for a person who uses 400 kWh in a month?

User Wkz
by
2.3k points

2 Answers

10 votes
10 votes

Answer:

D. $80 apeggs

Explanation:

User Jleture
by
3.3k points
27 votes
27 votes

Answer:

The bill is $30

Explanation:

Given


b(x) = \left \{ {{0.10x,\ x \le 200} \atop {0.15(x - 200)\ x > 200}} \right.

See attachment

Required

Determine the bill when KWh = 400

From the given piece-wise function.

We make use of:


b(x) = 0.15(x - 200)

Because
400 > 200

Substitute 400 for x in b(x)


b(400) = 0.15 * (400 - 200)


b(400) = 0.15 * 200\\


b(400) = 30

The bill is $30

An electric company calculates a person's monthly bill from the number of kilowatt-example-1
User Swazimodo
by
3.3k points