math
posted by leroy .
The area of some shape varies directly with the square of its side. If a shape with 2cm sides has an area 10cm^2,what would be the area of a shape ofthe same type with side of 3cm.

math 
bobpursley
area=k*s^2
10=k*2^2 or k= 2.5
area= 2.5*3^2=2.5*9= you do it. 
math 
leroy
thank you, i think i got it now.
Respond to this Question
Similar Questions

Math
If you get to pick a shape of a 20 mile perimiter what shape would be most efficient and why The shape's efficiency is determined by what you define efficency as: If you were trying to enclose the maximum area, a circle. If you were … 
maths
Kat has a recipe for a 10cm square based iced cake of height 5 cm. He wants to scale the recipe down for a 6 cm square based cake tin, by scaling it down all the ingredients to give a smaller cake of the same shape. Choose the three … 
word problems in algebra
A square has sides of length 3x  2 cm. Express the area of the square as a polynomial. would i write this as 3x2cm^4 because there are foru sides sorry post went before i was done polynominial confuse me after thinking about what … 
Engineering
There is a shape that has a right triangle on top of a square, I need to find the area of the shape H1\  \  \  H2 ___ B B=20Ft H2= 75lb/ft H1= 150 lb/ft I got 600 for the total area, am I close 
math
a crystal in the shape of a cube is growing in a labatory. estimate the rate at which the surface area is changing with respect to the side length when the side length of the crystal is 3cm. 
Math.
On finding a perimeter and area and there is a decimal for the shape but the 2 other numbers on the shape don't. Do I multiply/add with the decimal on all numbers or only on that 1 number? 
Math
A string is 12in. long which makes a rectangle area of 5sq.inch can you make a shape that has a greater area with the string, if so what's the shape and area. 
Algebra  area
I hope I can explain this. I can't draw the shape here, but it is a triangular prism that looks like a wedge of cheese. The height is 20 cm and the three sides are 13, 37, and 40 cm. There is also a line drawn from the corner of the … 
MathAlgebra
1. The area of a square varies directly as the square of its side. If the side is halved, what would be the effect on its area? 
math
From a piece of pin in the shape of a square 6 inches on a side, the largest possible circle is cut out. Of the following, the ratio of the area of the circle to the area of the original square is closest in value to A. 4/5 B. 3/5 …