math 8th grade
posted by Anonymous .
if length and width of a 3in. x5 ln. photo are tripled what scale factor relates the area 3,9,12,27 i answered 27 is this correct i tried 9 but got no answer

recall that area of rectangle (shape of the photo) is given by
A = length * width
substituting,
A (original) = 3 * 5 = 15
if we triple both length and width,
new length = 3 * 5 = 15
new width = 3 * 3 = 9
thus,
A (new) = 15 * 9 = 105
to get the ratio, we divide the new area by original area:
105 / 15 = 9
hope this helps~ :)
Respond to this Question
Similar Questions

math 117
A rectangle has an area of (a^2+4a+4) square inches, and you know that the width is (a+2) inches. You can use long division to determine the length of the box. area = length * width, length = area/width I got this as my answer The … 
Math
A photo width is 2 in. more than it's length. A borderof 1 in is placed around the photo, and the area covered by the photo and it's border is 120 sq. inches. Find the dimensions of the photo itself. 
8 th grade math
3in.x 5in. photo are triped what scale factor is used 
8 th grade math
length and width of a 3in x 5 in photo are tripled what scale factor is used i put 9 id that right 
8th grade math
length and width of a 3ln. x 5jn. photo are tripled what scale factor relates the areas choices are 3,9,12,27 i chose 3 because it said triple is that right 
central middle
what do you get as your new length and width if you enlarge a 8 cm by 10 cm photo by a scale factor of 150% 
EQUVALENT RATIO
When a photo is reduced or enlarged, its length to width ratio usually remains the same. Sarah wants to enlarge a 4in.by 6in. photo so that it has a width of 15in.Use a ratio table to determine the new length of the photo. length 4 … 
Math
We have a picture frame with width being 3 1/4 inches and length unknown. We need to fit picture with width of 4 cm and length 4.6 cm into frame. What is the scale factor for enlargement? 
Math7th grade
A scale drawing is a parallelogram with a base of 8 inches, a height of 3 inches, and a side length of 4 inches. What is the perimeter and area? 
math
The length by the width of Roxie's photo is 24 cm long and 14 cm wide. In order to make a photo that will fit into a wallet, the photo needs to be reduced to a length of 7 cm. Determine the width of the wallet size photo.