The heat of fusion of water is 79.9 cal/g. How much heat would be required to melt 69.9 g of ice?

Explanation:

impossible to know

B.  

Step-by-step explanation:

Given : Nala can spend no more than $150 per month on gasoline.

She has already purchased $60 in gas this month.

The cost of each fill-up = $30

Let x be the number of fill-ups she can purchase during the rest of the month.

Then , the cost of fill-ups she can purchase during the rest of the month = 30x

Then , the inequality can be used to find the maximum number of fill-ups she can purchase during the rest of the month is given by :-