Question

Compare the rates for different numbers of texts. If Roger's father wants to get a 600-text message plan, what is the difference in price for the Dial It Up and Ring Ring plans?

Answer 1

`\$6`

Explanation:

Given

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Required

The difference in the cost of 600 text messages plan

Representing the given data as; Cost to Number of text messages, we have:

`Dial\ Up = \$5 : 100`

and

`Ring\ Ring= \$8 : 200`

Multiply the dial-up by 6 to get the cost of 600

`Dial\ Up = \$5 *6 : 100 * 6`

`Dial\ Up = \$30 : 600`

So, the cost of 600 text messages is $30 --- for dial-up

Multiply the Ring Ring by 3 to get the cost of 600

`Ring\ Ring= \$8 *3: 200*3`

`Ring\ Ring= \$24: 600`

So, the cost of 600 text messages is $24 --- for Ring Ring

The difference (d) is:

`d = \$30 - \$24`

`d = \$6`