given that 100.48 = x, 100.70 = y and xz = y 2, then the value of z is close to:  Pick one
A) 2.2	B) 8.2	C) 2.9	D) 2.1	E) 2.6
<gadget id="calculator">100.7 - 100</gadget>
<output>0.7</output>

<gadget id="calculator">0.7 * 2</gadget>
<output>1.4</output>

<gadget id="calculator">100.48 - 100</gadget>
<output>0.48</output>

<gadget id="calculator">1.4 / 0.48</gadget>
<output>2.916667</output>

<result>C</result>
given that 100.48 = x, 100.70 = y and xz = y 2, then the value of z is close to:
divide(multiply(subtract(100.70, const_100), const_2), subtract(100.48, const_100))
"xz = y 2 10 ( 0.48 z ) = 10 ( 2 x 0.70 ) = 101.40 0.48 z = 1.40 z = 140 = 35 = 2.9 ( approx . ) 48 12 answer : c"