Question

Pls help me with this question, I need the answer and the step pls! Pls! Help me!

Answer 1

10) Enlarging by a factor of 7 corresponds to an increase by a factor of
`7^2` for the area, or 49. The new rectangle has area 980 square-inches.

To verify, let's say the dimensions of the original rectangle are
`5 \ in * 4 \ in`. We increase each dimension by a factor of 7 to get
`35 \ in * 28 \ in`. This new area is 980 square-inches.

11) We use the same concept. Increasing by a factor of 0.6 corresponds to increasing the area by
`0.6^2` (n.b., an increase by a factor less than 1 is shrinking). Original area is
`(30)(10)( (1)/(2))=150`. New area is
`(150)(0.36)=54 \ cm^2`.

12) We multiply 15 by 11/30 to get 5.5 ft. We multiply 8.25 by the same factor to get 3.025 ft. The area is
`5.5 \ ft * 3.025 \ ft = 16.6375 \ ft^2`.