<p>for practice test 8 section 3:
8. The price of ground coffee beans is D dollars for 8 ounces and each ounce makes C cups of brewed coffee. In terms of C and D, what is the dollar cost of the ground coffee beans required to make 1 cup of brewed coffee?
A) D/8C
B) CD/8
C) 8C/D
D) 8D/C
E) 8CD</p>
<ol>
<li>For all positive integers j and k, let j [R] k be defined as the whole number remainder when j is divided by k. If 13 [R] k =2, what is teh value of k?</li>
</ol>
<p>test 8 section 9:
6. For a certain hot-water heater, the increase in heating expenses is directly proportional to the increase in water-temp. setting. If heating expenses increase by 24$ whent he water-temp setting is increased by 20 degrees fahrenheit, by how much will heating expenses increase when the water temp setting is increased by 15 degrees fahrenheit?
A) 16$
B)18$
C) 19$</p>
<p>any help will be appreciated! thanks!</p>