The mean proportional between 4 and 9 is?  Select the correct option: A) 33 B) 77 C) 35 D) 88 E) 29
7/20 * 100= 
<gadget id="calculator">7/20 * 100</gadget>
<output>35</output>
35   Answer:77
<result>B</result>
The mean proportional between 4 and 9 is?