A computer factory produces 4200 computers per month at a constant rate, how many computers are built every 30 minutes assuming that there are 28 days in one month? Pick:
A) 2.25	B) 3.125.	C) 4.5	D) 5.225	E) 6.25
Number of hours in 28 days = 28*24   Number of 30 mins in 28 days = 28*24*2   Number of computers built every 30 mins = 4200/( 28*24*2)= 
<gadget id="calculator">4200/( 28*24*2)</gadget>
<output>25/8 = around 3.125</output>
3.125   Answer 3.125.
<result>B</result>
A computer factory produces 4200 computers per month at a constant rate, how many computers are built every 30 minutes assuming that there are 28 days in one month?