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Recent problems solved by 'user_dude2008'
user_dude2008 answered: 1858 problems
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I am taking a work at your own pace class and do not have a text book, we get booklets premade by someone.
here is my question, we are in trig right now
A 3.6m tall person casts a shadow 7.25m long. At the same time of day a tree casts a shadow 67.2m long. How tall is the tree?
Thank you
1 solutions
Answer 137784 by user_dude2008(1861)   on 2009-02-24 12:31:25 (Show Source):
You can put this solution on YOUR website!"A 3.6m tall person casts a shadow 7.25m long. At the same time of day a tree casts a shadow 67.2m long. How tall is the tree?"
3.6/7.25=x/62.7
0.497=x/62.7
0.497(62.7)=x
31.134=x
Answer: x=31.134
Tree is 31.134 meters
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Geometric_formulas/183430: Hello (:
I have a question, and I couldn't find the answer anywhere on the Internet. So, do you know what the formula for a nonrectangular parallelogram is?
The question asked was
16. Let a and represent the side lengths and h the height to a side of length b in a nonrectangular parallelogram whose area is A. What is the formula for the area of the parallelogram?
A: A = b X h
B: A = a X h
C: A = a X b
D: A = h X (a + b)
Thank you for your time
(:
1 solutions
Answer 137731 by user_dude2008(1861) on 2009-02-23 20:09:33 (Show Source):
You can put this solution on YOUR website!Area of a parallelogram:
A=b x h .... x is multiply
See this page: http://www.mathgoodies.com/lessons/vol1/area_parallelogram.html
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Graphs/183331: I really don't get this!!
7.
The points (1,5), (4,5), and (1,0) represent three corners of a rectangle; find the coordinates of the fourth point.
thank you!!!
1 solutions
Answer 137676 by user_dude2008(1861) on 2009-02-23 13:35:42 (Show Source):
You can put this solution on YOUR website!Rectangles have points that share coordinates. So (1,5), (4,5) share y-coord and (1,5) and (1,0) share x-coord
So last point is (4,0) shares x-coord with (4,5) and shares y-coord with (1,0)
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Miscellaneous_Word_Problems/183371: This question is from textbook Survey of Math
use a proportion to determine the number of trout in a lake, a conservationist catches 112 trout, tags them and returns them to the lake. Later, 82 trout are caught, and 32 of them are found to be tagged. How many trout are in the lake?
1 solutions
Answer 137668 by user_dude2008(1861) on 2009-02-23 13:19:23 (Show Source):
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Mixture_Word_Problems/183187: Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. Soution: 3, only solution.
The equation is _____=0.
1 solutions
Answer 137540 by user_dude2008(1861) on 2009-02-22 14:44:07 (Show Source):
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Mixture_Word_Problems/183185: Write a quadratic equation having the given numbers as solutions. -6 and -2
The quadratic equation is _______=0 Type your answer in standard form. Type an expression using x as a variable.
1 solutions
Answer 137537 by user_dude2008(1861) on 2009-02-22 14:38:12 (Show Source):
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Trigonometry-basics/183068: This question is from textbook
Find all solutions to the equation. Use a lower-case n to denote an arbitrary integer; separate your answers with commas; use the most compact expressions possible.
(cos(x) - 1) sin(x) = 0
Any help is greatly appreciated! I am really struggling just to start these problems. I received 0 + 2Pi as an answer for this but the system said it was wrong.
1 solutions
Answer 137441 by user_dude2008(1861) on 2009-02-21 18:09:55 (Show Source):
You can put this solution on YOUR website!Last post is incorrect. pi/2 and (3/2)pi is not a solution
Solutions are 0, 2pi, etc..
So solution set is x = 2pi*n where n is an integer
Note: I checked answer with calculator
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Finance/183028: Jason comapred 2 brands of cooking oil sold in different size bottles
Brand A: 24 ounces for $1.68
Brand B: 32 ounces for $ 2.40
determine which brand has the betterr unit price
ok so i tried solving it by reducing 24 ounces to 3 and 1.68 dollars to .21 by dividing both numbers by 8
i did the same with 32 and 2.40
but if they were asking for the unit price, theyde probably want just 1 ounce and not 3 or 4. so thats where i need help. please help me
1 solutions
Answer 137397 by user_dude2008(1861) on 2009-02-21 14:59:10 (Show Source):
You can put this solution on YOUR website!Brand A Unit Price:
24 oz = 1.68 dollars
---> 24/24 oz = 1.68/24
---> 1 oz = 0.07 dollars
Brand B Unit Price:
32 oz = 2.40 dollars
---> 32/32 oz = 2.40/32
---> 1 oz = 0.075 dollars
Brand A has the lower unit price
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Money_Word_Problems/182043: This question is from textbook saxon algebra 2
A savings account earns interest at an annual rate of 4%, compounded quarterly. If the account begins with a principal amount of $4000, what will its value be after 3 years?
A=P(1+ 0.04/4)^4(3)
A=$4502.32
Am I Correct?
1 solutions
Answer 136639 by user_dude2008(1861) on 2009-02-15 15:18:56 (Show Source):
You can put this solution on YOUR website!"A savings account earns interest at an annual rate of 4%, compounded quarterly. If the account begins with a principal amount of $4000, what will its value be after 3 years?"
-----------> P=4000, r=0.04, n=4, t=3
A=P(1+ r/n)^(n*t)
A=4000(1+ 0.04/4)^(4*3)
A=4000(1.01)^(12)
A=4,507.30
you will have $4,507.30 in the account
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Coordinate-system/182030: This question is from textbook College Algebra The Graphing Approach
This is a two part question:
The function f(x) is graphed points are (3,-1), (1,0), (0,3), (-2,4)
Graph y=-f(x-2)
I'm not sure but I have the new points as (-3,-1), (0,1), (0,3) (2,4)
Could you check this for me
The funtion f(x) is graphed points are (3,-1), (1,0), (0,3), (-2,4)
Graph y=f(2x)
I have a TI-84 Plus - I'm not sure how to use it very well and my instructor doesn't give much in the way of using it. So I'm kind of lost.
Thanks for your help
1 solutions
Answer 136632 by user_dude2008(1861) on 2009-02-15 13:55:12 (Show Source):
You can put this solution on YOUR website!Points are of form:
(x,y) or (x, f(x))
f(x-2) tells you to subtract 2 from each x to get new y, but you need to add 2 to undo this. So add 2 to each x (keep y the same)
New points:
(5,-1), (3,0), (2,3), (0,4)
-------------------------------------------------
f(2x) tells you to double each x. Need to take half of each x to undo this
New points:
(1.5, -1), (0.5, 0), (0, 3), (-1, 4)
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Proportions/181777: This question is from textbook Algebra
The sum of the reciprocals of two consecutive odd integers is 8/15 (which is a fraction). What are the integers?
1 solutions
Answer 136407 by user_dude2008(1861) on 2009-02-13 13:08:42 (Show Source):
You can put this solution on YOUR website!1/x+1/(x+2)=8/15
(x+2+x)/(x(x+2))=8/15
30x+30=8x^2+16x
8x^2-14x-30=0
2(4x+5)(x-3)=0
4x+5=0 ---> x=-5/4=-1.25 (ignore, not an integer)
or
x-3=0 ----> x=3
1st Num: 3
2nd Num: 3+2=5
Two numbers: 3 and 5
Check:
1/3+1/5=5/15+3/15=8/15
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Polynomials-and-rational-expressions/180968: Simply the expression:
2n^2y^19n^11y^5 2
the 2 at the end does not mean to square the expression to the second power! It is a number without variables or exponents
a) 4n^13y^24
b) no correct answer
c) 2n^30y^7
d) 4y^13n^24
how did you get the answer
1 solutions
Answer 135688 by user_dude2008(1861) on 2009-02-08 23:36:57 (Show Source):
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Probability-and-statistics/180897: How can I proceed to solve this problem? Thank you.
In establishing warranties on HDTV sets, the manufacturer wants to set the limites so that few will need repair at manufacturer expense. On the other hand, the warranty period mst be long enough to make the purchase attractive to the buyer. For a new HDTV the mean number of months until repairs are needed is 36.84 with a standard deviation of 3.34 months. Where should the warranty limits be set so that only 10 percent of the HDTVs need repairs at the manufacturer's expensive?
1 solutions
Answer 135623 by user_dude2008(1861) on 2009-02-08 14:02:52 (Show Source):
You can put this solution on YOUR website!See this other solution (same problem)
http://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.175302.html
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