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# Recent problems solved by 'rfer'

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 Money_Word_Problems/430358: As part of your retirement plan, you have decided to depostit 3000.00 at the beginning of each year into an account paying 5% interest compounded annually. How much would the account be worth after 10 years? How much would the account be worth after 20 years? When you retire in 30 years, what will be the total worth of the account? If you found a bank that paid 6% inrerest counpunded annually, rather than 5%, how much more would you have in the account after 30years?1 solutions Answer 298867 by rfer(12647)   on 2011-04-02 20:41:05 (Show Source): You can put this solution on YOUR website!FV=P((1+i)^n-1)/i FV=3000((1.05)^10-1)/0.05 FV=3000((1.62889)-1)/0.05 FV=3000*.62889/0.05 FV=\$37,733.40
 Probability-and-statistics/430360: A math teacher is randomly distributing 15 rulers with centimeter labels and 10 rulers without centimeters labels.What is the probability that the first ruler she hands out will have centimeter labels and the second ruler will not have labels?1 solutions Answer 298865 by rfer(12647)   on 2011-04-02 20:27:19 (Show Source): You can put this solution on YOUR website!15/25*10/24 3/5*5/12=15/60=1/4=25%
 Linear_Algebra/430315: how would you solve 9x+2=11 1 solutions Answer 298860 by rfer(12647)   on 2011-04-02 19:56:10 (Show Source): You can put this solution on YOUR website!9x=11-2 9x=9 x=1
 Money_Word_Problems/430338: Attempting to fine the original cost of a product. If a product sold for \$100.00, what was the cost if it was mark up 3.5 percent? Need to know the formula to use to figure this out. I have a lot of products to do. Thanks 1 solutions Answer 298859 by rfer(12647)   on 2011-04-02 19:55:03 (Show Source): You can put this solution on YOUR website!100/1.035=\$96.62
 Finance/430317: A little help please?! What is the future value of \$12,000 at 4.3% for 18 months (to the nearest dollar) Thank you in advacne!! :) 1 solutions Answer 298857 by rfer(12647)   on 2011-04-02 19:53:04 (Show Source): You can put this solution on YOUR website!FV=12000(1.043)^1.5 FV=\$12,782.00
 Quadratic_Equations/430287: How to find the zeros of the function by graphing the function? F(x)= x^2 - 251 solutions Answer 298822 by rfer(12647)   on 2011-04-02 17:34:35 (Show Source): You can put this solution on YOUR website!(-5,0) and (5,0)
 Probability-and-statistics/430282: What is the coefficient of x^2 of the Expression of (2+x)^51 solutions Answer 298821 by rfer(12647)   on 2011-04-02 17:32:02 (Show Source): You can put this solution on YOUR website!= 1
 absolute-value/430299: x+(4^2)=18 what does x equal to?1 solutions Answer 298819 by rfer(12647)   on 2011-04-02 17:29:59 (Show Source): You can put this solution on YOUR website!x= (-2.3,0) and (2,0)
 Vectors/430288: 54-6 divided 2+61 solutions Answer 298817 by rfer(12647)   on 2011-04-02 17:25:19 (Show Source): You can put this solution on YOUR website!54-3+6=57
 Quadratic_Equations/430301: A student opens a math book to two facing pages. The product of the page number is 506. Find the first and second page number. Please help thanks1 solutions Answer 298815 by rfer(12647)   on 2011-04-02 17:21:36 (Show Source): You can put this solution on YOUR website!pages 22 and 23
 Travel_Word_Problems/429805: if steve drives 65miles per hour whats the ratio of miles to hours1 solutions Answer 298522 by rfer(12647)   on 2011-03-31 22:58:19 (Show Source): You can put this solution on YOUR website!65:1
 Signed-numbers/429799: (3x-5y) - 2(7x+5y) simplify bu combining like terms1 solutions Answer 298521 by rfer(12647)   on 2011-03-31 22:57:16 (Show Source): You can put this solution on YOUR website!3x-5y-14x-10y -11x-15y
 test/429835: Hi the problem is N over three -15 equals 251 solutions Answer 298520 by rfer(12647)   on 2011-03-31 22:54:28 (Show Source): You can put this solution on YOUR website!n/3-15=25 n/3=40 n=120
 Polynomials-and-rational-expressions/429415: how do you factor this trinomial xsquare - x - 201 solutions Answer 298236 by rfer(12647)   on 2011-03-30 21:05:05 (Show Source): You can put this solution on YOUR website!(x-5)(x+4)
 Radicals/429416: the square root of 16x to the power of 14. How do I simplify that and solve it?1 solutions Answer 298235 by rfer(12647)   on 2011-03-30 21:03:46 (Show Source): You can put this solution on YOUR website!4x^7
 Money_Word_Problems/429366: The interest on \$50,000 for 100 days at 14% is how much if you use a 360 day a year calendar?1 solutions Answer 298234 by rfer(12647)   on 2011-03-30 20:57:46 (Show Source): You can put this solution on YOUR website!I=Prt I=50000*0.14*100/360 I=\$1,944.44
 Rectangles/429386: a square has side s = 7 cm. Find the perimeter of the square ? 1 solutions Answer 298233 by rfer(12647)   on 2011-03-30 20:54:19 (Show Source): You can put this solution on YOUR website!P=4s P=28 cm
 Rational-functions/429401: Hello(: I am having difficulties with this problem. Graph: 5x+1 ≤ 3(x-2)1 solutions Answer 298231 by rfer(12647)   on 2011-03-30 20:52:45 (Show Source): You can put this solution on YOUR website!5x+1 =< 3x-6 2x =< -7 x =< -3.5
 Triangles/429400: suppose a triangle has an area of 220 square meters. what is the measure of the height if the base measures 20 meters1 solutions Answer 298230 by rfer(12647)   on 2011-03-30 20:50:52 (Show Source): You can put this solution on YOUR website!220=20h/2 440=20h h=22
 Geometry_Word_Problems/429379: A rectangle is twice as wide as it is long. If the area is 1152 square meters, what are the dimensions of the rectangle? 1 solutions Answer 298229 by rfer(12647)   on 2011-03-30 20:48:30 (Show Source): You can put this solution on YOUR website!2x*x=1152 2x^2=1152 x^2=576 x=24
 Numbers_Word_Problems/429399: i am thinking of a number. if you multiply it by 9 and then subtract 4, the answer is 41. what is my number? 1 solutions Answer 298227 by rfer(12647)   on 2011-03-30 20:45:44 (Show Source): You can put this solution on YOUR website!9x-4=41 9x=45 x=5
 Rectangles/429391: Find the area of the rectangular rug if the width is 12 feet and the diagonal is 20 feet.1 solutions Answer 298226 by rfer(12647)   on 2011-03-30 20:44:39 (Show Source): You can put this solution on YOUR website!This is a 12, 15, 20 triangle ------------------------- a=LW a=12*15 a=180 sq ft
 Distributive-associative-commutative-properties/429395: how do you foil (2x+3)(x-2)1 solutions Answer 298224 by rfer(12647)   on 2011-03-30 20:41:59 (Show Source): You can put this solution on YOUR website!2x^2-4x+3x-6 2x^2-x-6
 Rectangles/429300: if a square has a width of 1 inch and an area of 1 foot what is the length?1 solutions Answer 298216 by rfer(12647)   on 2011-03-30 18:28:59 (Show Source): You can put this solution on YOUR website!a square all sides are equal.L=1 in
 percentage/429246: 5% were black, 20% were red, 35% were orange, and the rest were white. What percent were white?1 solutions Answer 298215 by rfer(12647)   on 2011-03-30 18:25:04 (Show Source): You can put this solution on YOUR website!40%
 Linear-equations/429281: A roof rises 2.4 feet vertically and 9.6 feet horizontally, what is the grade of the roof? The grade of the roof is? %1 solutions Answer 298214 by rfer(12647)   on 2011-03-30 18:20:33 (Show Source): You can put this solution on YOUR website!2.4/9.6=0.25=25%
 Numeric_Fractions/429275: A radio station can be heard 115 miles in all directions during evering hours. how many square miles are in the stations broadcast area?USE 3.14 as the approximiate value.1 solutions Answer 298213 by rfer(12647)   on 2011-03-30 18:18:14 (Show Source): You can put this solution on YOUR website!A=3.14*115^2 A=41,526.6 sq mi
 Geometry_Word_Problems/429286: A building casts a shadow 96 meters long. At the same time, a nearby pole 6 meters high casts a shadow 18 meters long. Find the height of the building. Help please.1 solutions Answer 298212 by rfer(12647)   on 2011-03-30 18:10:44 (Show Source): You can put this solution on YOUR website!6/18=x/96 18x=576 x=32 m
 Geometry_proofs/429288: A billboard is 27 feet high and casts a 36-foot shadow. At the same time,a cell-phone tower to the billboard casts a 72-foot shadow. Which proportion can be used to find height. H,of the cell-phone tower?1 solutions Answer 298211 by rfer(12647)   on 2011-03-30 18:08:51 (Show Source): You can put this solution on YOUR website!27/36=h/72 36h=1944 h=54 ft
 Polynomials-and-rational-expressions/429285: what is 16v squared minus 16?1 solutions Answer 298210 by rfer(12647)   on 2011-03-30 18:07:03 (Show Source): You can put this solution on YOUR website!16v^2-16=0 16v^2=16 v^2=1 v=1
 Circles/429282: find the circumferemce and area of the circle having the given diameter. USE 3.14 π.d=14.80 km1 solutions Answer 298209 by rfer(12647)   on 2011-03-30 18:05:28 (Show Source): You can put this solution on YOUR website!C=3.14*14.80 C=46.47 km