Question

Am i correct with this?
1)Calculate, for a wall 15.3 m long and 1.640 m high (using correct significant figures)
(a) the area of the wall. (Show how you arrived at the answer.) 15.3x1.640=25.092m
=25.09m
(b) the perimeter of the wall. (Show how you arrived at the answer.) i got 33.88m=33.91
i added all 4 sides)
. 2)What is the sum of the following masses? 5.08 kg, 15.9 kg, 8.2 kg.

i got
5.08+5.08+8.2=29.18kg

Answer 1

u 've got the correct answers for 3 questions....
but y did u write
33.88 m = 33.91 m ?
33.88 m is the perimeter

Answer 2

i wanted to round it off to 2 significant figures

Answer 3

if u round off 33.88 to the second decimal place... it is 33.9 not 33.91 :p

Answer 4

k thanks:)