the present population of a town is 280. population increase rate is 10 % p. a. find the population of town after 1 years?	Select
A) 100
B) 120
C) 200
D) 220
E) 308
<gadget id="calculator">280 * 10</gadget>
<output>2_800</output>

<gadget id="calculator">2_800 / 100</gadget>
<output>28</output>

<gadget id="calculator">280 + 28</gadget>
<output>308</output>

<result>E</result>
the present population of a town is 280. population increase rate is 10 % p. a. find the population of town after 1 years?
add(280, divide(multiply(280, 10), const_100))
"p = 280 r = 10 % required population of town = p * ( 1 + r / 100 ) ^ t = 280 * ( 1 + 10 / 100 ) = 280 * ( 11 / 10 ) = 308 answer is e"