Question

A square photograph with sides of 15 inchs must be ruduced o an area 40% of its orginal size to it in a book. Find the length of each side of the reduced photograph. Round to nearesst of the tenth

Answer 1

15^2 = A
A = 225 inch.^2
.40 * 225 = 90.
\[\sqrt{90} = 9.4868\]
So 9.5 is the side length

Answer 2

why wouldnt you do 225-90 and then get the sqare root of that

Answer 3

Because you said you want an area of 40% it's original. If u had wanted to only reduce 40% then you would do 225-90.