Answer:
$720
Step-by-step explanation:
Coefficient of performance of a refrigerator (COP) =
desired out i.e energy removed = 600Bth/hr
Required input=?
2.4=
required input==25Btu/hr
cost of electricity per hour = $0.08
cost of electricity for 360 hours =$0.08×360=$28.8
for an input of 25Btu/hr and 360 hours
∴cost of electricity in month =$28.8×25=$720
Answer:
<h2>4</h2>Step-by-step explanation:
<em>Look at the picture.</em>
<em />
<em>At the beginning we have to calculate what part of the angle 360° is the given angle 75°.</em>
<em /><em />
<em>The same part of the circumference of the circle is the arc defined by this central angle.</em>
The circumference <em>C = 20</em>.
Therefore
