Question

Carl is the owner of a shoe store and notices that his electricity bill has increased by 3%. Which of the expressions below represent a 3% increase? 1.a + 0.03a2.a+0.3a3.1.03a4.1.3a

Answer 1

3.1.03a

1) Considering that the electriciy bill be "a", and the increasing of 3% be written in decimal form:

a(1 + 0.03) Note that 1 is equivalent to 100% and 0.03 is to 3%

a( 1.03)

2) Hence, the expression that represents a 3% increase is 1.03a