algebra
posted by denise .
A scale model of the new dog park has an area of 128 cm2. The actual dog park will have an area of 8 km2. Find the scale that has been used for the model.

8km^2*scale^2=128cm^2
8*k(10cm)^2*scale^2=128cm^2
scale^2= 128/*8000*100)=1/6250
scale= 1/79 appx
Respond to this Question
Similar Questions

Math help
(a) A street guide for Belfast has a scale of 1:15 000. A walkway through the city is 2.4 km long. Find the length of the walkway on the map. Give your answer in centimetres. (b) Ormeau Park in Belfast has an area of about 25 cm2 on … 
Math help
Ormeau Park in Belfast has an area of about 25 cm2 on the same map. Calculate the area of the park on the ground. Give your answer in km2, correct to 2 significant figures 
math
(a) A street guide for Belfast has a scale of 1:15 000. A walkway through the city is 2.4 km long. Find the length of the walkway on the map. Give your answer in centimetres. (b) Ormeau Park in Belfast has an area of about 25 cm2 on … 
math
1) on a map of scale 1cm to 250m the area of car park is 3cm^2.what is the actual area of the car park in hecares(1 hectare= 10,000m^2) 2)The area of the playing surface at wembly stadium is 3/5 of a hectare . what area willit occupy … 
algebra
A scale model of a park has an area of 192 cm2. The actual park has an area of 12 km2. What is the scale factor used for the model? 
math
A model of a park was built on scale of 1.5cm to 50m. If the distance between two trees in the park is 150m, what is the distance on the model? 
Math
Sharon made a scale drawing of a triangular park. The coordinates for the vertices of the park are: (– 10, 5) (15, 5) (10, 12) Her scale is 1 unit = 1 meter. What is the area of the triangular park in square meters? 
math
Sharon made a scale drawing of a triangular park. The coordinates for the vertices of the park are: (– 10, 5) (15, 5) (10, 12) Her scale is 1 unit = 1 meter. What is the area of the triangular park in square meters? 
math
The area of the scale model of a playground is 6 square yards. The scale model is enlarged by a scale factor of 3 to create the actual playground. What is the area of the actual playground? 
math
The scale model of a rectangular garden is 1.5 ft by 4 ft. The scale model is enlarged by a scale factor of 7 to create the actual garden. What is the area of the actual garden?