precal nightmare
posted by Anonymous .
Suppose a U.S. presidential candidate announced that, if elected, he would create a national park out of trash. For a period of one year, all residential and commercial trash usually sent to landfills would be trucked to a central spot. Over time, the trash would spread out in an everwidening circle to a thickness of 3 feet. The latest scientific methods would be applied to convert the trash to playgrounds and picnic areas. The candidate also promised to reside at the center of the park. (don't know if that's relevant)
The candidate's environmental policy committee found that 60% of American trash is residential, while 40% is commercial. Four hundred and twentyfive pounds of residential trash occupy one cubic yard; whereas 375 pounds of commercial trash occupy one cubic yard.The total amount of trash dumped per day is 570,000 tons. find the total volume of commercial plus resid

precal nightmare 
drwls
There are 0.60x570,000 = 342,000 tons = 6.84*10^8 lb per day of residential trash, occupying 1.609*10^6 cubic yards.
There are 0.40*570,000 = 228,000 tons = 4.56*10^8 lb per day of commercial trash, occupying 1.216*10^6 cubic yard.
Total cubic yards per day = 2.825*10^6 cubic yards.
Multiply this by 365 days for the volume deposited in a year. I get 1.616*10^9 cubic yards.
The area will be 1.616*10^9 square yards, since it is a yard thick.
The radius will be 22704 yards, or 12.89 miles. 
precal nightmare 
Anonymous
It's a multiple choice, those aren't one of the options. I'm not understanding where you got some of your numbers. Should 342,000 and 228,000 be divided by 425 to get the cubic yards?

precal nightmare 
drwls
The two types of garbage get divided by different densities to get volumes.
The problem may be that the 60/40 ratio applies to volumes and not weights. That would require a different method. They should have said which it is.
I also could have made a math error. It happens.
Respond to this Question
Similar Questions

Macroeconomics
All houses in LA pay for weekly trash service. I pay $45 per quarter to have trash removed from my house once a week. My neighbor, the little old lady next door, always has much less trash than we do. I believe it would be good for … 
Finite Math help wanted. Super hard!
In a past presidential election, it was estimated that the probability that the Republican candidate would be elected was 2/3, and therefore the probability that the Democratic candidate would be elected was 1/3 (the two Independent … 
Need help, 3 questions
19. Most readers will wait patiently for the next book in the series to be released. complete predicate complete subject simple predicate simple subject 20. After that, we can get some popcorn at the snack bar. complete predicate complete … 
English
Can someone tell me what's the British for the words "common trash barrels", "sorted trash", "regular kitchen" trash or food/garden waste? 
Math
Q. Timothy has to take out the trash every day at his house. There are 11 trash cans in his house and it takes him 14 seconds per trash can to empty them into the big trash can in the garbage. About how many minutes does he spend emptying … 
Art plzz help
In this image with the trash can, the principles of design 1. Emphasize the message through color and shape 2distract the viewer from the message 3.were created through strong use of texture 4. communicate the message with a large … 
math/statistics
In a past presidential election, it was estimated that the probability that the Republican candidate would be elected was 1/3, and therefore the probability that the Democratic candidate would be elected was 2/3 (the two Independent … 
math
In a past presidential election, it was estimated that the probability that the Republican candidate would be elected was 1/3, and therefore the probability that the Democratic candidate would be elected was 2/3 (the two Independent … 
science
Observation The trash smells. Explanation Decaying biological material causes the trash to smell. Test (independent variable) Add food scraps to one trash can along with other materials, such as plastic, cardboard, paper, and tin. … 
Social Studies
A local park is always littered with trash. Every time Alisha takes her dog to the park, she can't help but notice that trash is everywhere. She knows that this is a hazard to the environment. When she looks around, Alisha realizes …