# Thread: [SOLVED] Pleaseee help me i need to hand it in tommorow

1. ## [SOLVED] Pleaseee help me i need to hand it in tommorow

the question is "" An energy conscious homeowner makes three successive improvements that save, in turn, 211%, 25% and 55%on the heating costs of the house. The overall percentage save is
a) 13% b)27% c)73% d)66% e)100""

thank you please tell me the answer in less then 10 hours if possible

2. Hello, kl050196!

Pay no attention to the man behind the curtain . . .

An energy-conscious homeowner makes three successive improvements
that save, in turn, 21%, 25% and 55% on the heating costs of the house.

The overall percentage saved is
. . $(a)\;13\%\qquad(b)\;27\%\qquad(c)\;73\%\qquad(d)\; 66\%\qquad(e)\;100\%$

The savings are: 21%, 25% and 55% of his heating bill.

This means that he pays: 79%, 75% and 45% of his heating bill.

. . That is, he pays: . $(0.79)(0.75)(0.45) \;=\;0.266625 \;\approx\;27\%$ of his heating bill.

EDIT (by Jhevon): so what percentage do you think he has saved?