Solve
Hat
-When Making a Telephone Call Using a Calling $\$ 1.15$

question 107

Multiple Choice

Solve.
hat
-When making a telephone call using a calling card, a call lasting 3 minutes costs $\$ 1.15$ . A call lasting 13 minutes costs $\$ 3.65$ . Let $y$ be the cost of making a call lasting $x$ minutes using a calling card. Write a linear equation that models the cost of making a call lasting $x$ minutes.

• A) \(y = 0.25 x + 0.4\)
• B) \(y = 0.25 x - 9.35\)
• C) \(y = - 0.25 x + 1.9\)
• D) \(y = 4 x - \frac { 217 } { 20 }\)

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Definitions:

Weak Acids

are acids that do not fully dissociate in aqueous solution, resulting in a low concentration of hydrogen ions.

Limestone

A sedimentary rock primarily composed of the mineral calcite (calcium carbonate), often formed from the skeletal remains of marine organisms.

Dissolved

A process in which solids are mixed into liquids to create a uniform solution, commonly occurring in both nature and chemical reactions.

Chemical Weathering

The breakdown of rocks and minerals through chemical reactions with substances in the environment, like water, oxygen, and acids.