A group of store managers must assemble 280 displays for an upcoming sale. If they assemble 25 percent of the displays during the first hour and 40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour?  Choose the correct choice from the following
A) 70  B) 98  C) 126  D) 168  E) 182
During the first hour 0.25*280= 
<gadget id="calculator">0.25*280</gadget>
<output>70</output>
70 displays were assembled.   During the second hour   0.4*(280-70)= 
<gadget id="calculator">  0.4*(280-70)</gadget>
<output>84</output>
84 displays were assembled.   Thus, 280 - (70+84)= 126 displays had not been assembled by the end of the second hour.   Answer: 126.
<result>C</result>
A group of store managers must assemble 280 displays for an upcoming sale. If they assemble 25 percent of the displays during the first hour and 40 percent of the remaining displays during the second hour, how many of the displays will not have been assembled by the end of the second hour?