Saturday

February 28, 2015

February 28, 2015

Posted by **lee** on Tuesday, April 2, 2013 at 11:31am.

One factor in flood safety along a levee is the area that will absorb water should the levee break. the coordinates that make up the boundry area are (0,0),(2.8,2.1)and(4.3,4.4) what is the area of the land that would absorb the water?

I believe its

a=]x1,y1,1_x2,y2,1_x3,y3,1]

=0,0,1_2.8,2.1,1_4.3,4.4,1]

area=1/2[det a]

then Im stuck

- algebra -
**Steve**, Tuesday, April 2, 2013 at 11:45amwhat, you can't find the determinant?

Those two zeros in the top row make it easy:

|A| = (2.8)(4.4)-(4.3)(2.1) = 3.29

Better review your determinants if this technique is going to come up often.

- algebra -
**lee**, Tuesday, April 2, 2013 at 11:53amOk I see I was not multiplying the right numbers. Thanks for clarifying for me.

- algebra -
**samantha**, Monday, April 15, 2013 at 9:32pmdo you think you could help me with this quiz?

**Answer this Question**

**Related Questions**

history - who built the levee's for the okeechobee lake?

social studies - Scientists estimate that 600,000 acres of land will disappear ...

4th Grade Math - Re: Factor Numbers My son has to write at least two ways to ...

4th Grade Math - Re: Factor Numbers My son has to write at least two ways to ...

language help ! - DAD: Where’s the water now? MOM: As high as the car’s wheels. ...

HELP PLEASE !! - DAD: Where’s the water now? MOM: As high as the car’s wheels. ...

Lang Arts! HELP! - Jaws of the Water ACT TWO At rise we see DAD, TINA, and MARK ...

algebra - i have two answers to this problem so am not sure which way I need to ...

Math/physics - Christian is making a Tyrolean traverse. That is, he traverses a ...

Algebra - Here is the problem: A two-digit number is eight times the sum of its ...