a light flashes every 30 seconds, how many times will it flash in ? of an hour?  Choose one
A) 550 B) 600 C) 650 D) 700 E) 120
1flash=30sec   for 1 min=2flashes   so for 1 hour=2*60= 
<gadget id="calculator">2*60</gadget>
<output>120</output>
120 flashes.   ANSW120R:120
<result>E</result>
a light flashes every 30 seconds, how many times will it flash in ? of an hour?