Yin's cellphone plan costs $30 a month. she used 12.5 hours in may. what was her cost per minute

cost per minute is 0.04

Step-by-step explanation:

Unit rates defined as the rates are expressed as a quantity of 1  such as 2 feet per second or 5 miles per hour they are called unit rates.

Given: Costs = $ 30 a month

In a month of may she used cellphone 12.5 hours.

First convert 12.5 hours in minute.

Use conversion: 1 hour = 60 minutes

then, 12.5 hours =

to find the cost per minute.

by definition;

unit rate(cost per minute ) = cost per minute.

therefore, her cost per minute is 0.04

B. NO

Step-by-step explanation:

Figure B can only be a scale copy of Figure A if the ratio of their corresponding side lengths are equal.

Let's find out:

9/3 = 3

7.3/2.2 ≈ 3.3

Thus:

9/3 ≠ 7.3/2.2

Since the ratio of their corresponding side lengths are not equal, therefore Figure B is not a scale copy of Figure A.

The answer is NO.