cost is expressed by the formula tb ^ 4. if b is doubled, the new cost q is what percent of the original cost?
Choose one:	A) q = 200	B) q = 600	C) q = 800	D) q = 1600	E) q = 50
<gadget id="calculator">2 ** 4</gadget>
<output>16</output>

<gadget id="calculator">16 * 100</gadget>
<output>1_600</output>

<result>D</result>
cost is expressed by the formula tb ^ 4. if b is doubled, the new cost q is what percent of the original cost?
multiply(power(const_2, 4), const_100)
"original cost c 1 = t 1 * b 1 ^ 4 new cost c 2 = t 2 * b 2 ^ 4 . . . . only b is doubled so t 2 = t 1 and b 2 = 2 b 1 c 2 = t 2 * ( 2 b 1 ) ^ 4 = 16 ( t 1 * b 1 ^ 4 ) = 16 c 1 16 times c 1 = > 1600 % of c 1 ans d = 1600"