Janine is considering buying a water filter and a reusable water bottle rather than buying bottled water. Will doing so save her money?

First, determine what information you need to answer this question, thenclick hereto display that info (along with other info).

• How much water does Janine drink in a day? She normally drinks 6 bottles a day, each 16.9 ounces.
• How much does a bottle of water cost? She buys 24-packs of 16.9 ounce bottles for $2.69.
• How much does a reusable water bottle cost? About $10.
• How long does a reusable water bottle last? Basically forever (or until you lose it).
• How much does a water filter cost? How much water will they filter?
• A faucet-mounted filter costs about $28 and includes one filter cartridge. Refill filters cost about $33 for a 3-pack. The box says each filter will filter up to 100 gallons (378 liters)
• A water filter pitcher costs about $22 and includes one filter cartridge. Refill filters cost about $20 for a 4-pack. The box says each filter lasts for 40 gallons or 2 months
• An under-sink filter costs $130 and includes one filter cartridge. Refill filters cost about $60 each. The filter lasts for 500 gallons.

Which option is cheapest over one year (365 days)?

Select an answer

Water bottles

faucet-mount filter

filter pitcher

under-sink filter

The cheapest option saves her $over a year.

Give your answer to the nearest cent. Pro-rate the costs (so if you only use half of a filter pack, only count half the cost).

The graph illustrates a normal distribution for the prices paid for a particular model of HD television. The mean price paid is $1800 and the standard deviation is $80.

1560

1640

1720

1800

1880

1960

2040

Distribution of Prices

What is the approximate percentage of buyers who paid between $1800 and $1880?

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What is the approximate percentage of buyers who paid between $1640 and $1800?

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What is the approximate percentage of buyers who paid between $1720 and $1880?

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What is the approximate percentage of buyers who paid between $1800 and $2040?

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What is the approximate percentage of buyers who paid less than $1640?

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What is the approximate percentage of buyers who paid less than $1560?

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