Question

Cost

(in dollars)
56-
52+
48-
44
40-
36+
32-
28-
24
20-
16+
124
8.
4
Residential Plan
Business Plan
10 12 14 16 18 20
Monthly water usage (in HCF)
24 26 28
(a) If the monthly water usage is 18 HCF, which plan costs less?
OResidential Plan
OBusiness Plan
How much less does it cost than the other plan?
$[]
X
Ś

Answer 1

Explanation:

To determine which plan costs less for a monthly water usage of 18 HCF, let's look at the cost chart provided for the Residential and Business Plans:

Residential Plan:

- For 10 HCF: $56

- For 12 HCF: $52

- For 14 HCF: $48

- For 16 HCF: $44

- For 18 HCF: $40

- For 20 HCF: $36

Business Plan:

- For 10 HCF: $32

- For 12 HCF: $28

- For 14 HCF: $24

- For 16 HCF: $20

- For 18 HCF: $16

- For 20 HCF: $12

For a monthly water usage of 18 HCF, the cost for the Residential Plan is $40, and the cost for the Business Plan is $16.

To calculate how much less the Residential Plan costs than the Business Plan:

$40 (Residential Plan) - $16 (Business Plan) = $24 less

So, the Residential Plan costs $24 less than the Business Plan for a monthly water usage of 18 HCF.