A computer factory produces 8400 computers per month at a constant rate, how many computers are built every 30 minutes assuming that there are 28 days in one month?
Options:	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 = 8400/( 28*24*2)= 
<gadget id="calculator">8400/( 28*24*2)</gadget>
<output>25/4 = around 6.25</output>
6.25   Answer 6.25.
<result>E</result>
A computer factory produces 8400 computers per month at a constant rate, how many computers are built every 30 minutes assuming that there are 28 days in one month?