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Alan3354 answered: 30973 problems
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Circles/748735: what is the volume of a cylinder rounded to the nearest tenth? h=18 r=5 1 solutions Answer 455612 by Alan3354(30993)   on 2013-05-14 18:08:30 (Show Source): You can put this solution on YOUR website! what is the volume of a cylinder rounded to the nearest tenth? h=18 r=5 -----------

Quadratic-relations-and-conic-sections/748727: (y-1)^2/16-(x-2)^2/9 1 solutions Answer 455611 by Alan3354(30993)   on 2013-05-14 18:07:44 (Show Source): You can put this solution on YOUR website! (y-1)^2/16-(x-2)^2/9 ------------- What about it?

test/748713: 1 solutions Answer 455609 by Alan3354(30993)   on 2013-05-14 18:01:11 (Show Source): You can put this solution on YOUR website!

Geometry_Word_Problems/748726: Pedro has a practice net in his backyard. The diagonal of the net is 6 feet. Find the length of one side of the net . 1 solutions Answer 455608 by Alan3354(30993)   on 2013-05-14 18:00:05 (Show Source): You can put this solution on YOUR website! Pedro has a practice net in his backyard. The diagonal of the net is 6 feet. Find the length of one side of the net . ----------- Not enough info. What is the sphape of the net? square? rectangle? trapezium?

Circles/748731: in the accompanying figure, central angle BOC measures 60 degrees. what is the number of degrees in the measure of inscribed angle BAC? 1 solutions Answer 455607 by Alan3354(30993)   on 2013-05-14 17:58:06 (Show Source): You can put this solution on YOUR website! no figure is shown

Equations/748708: Is 4z equal to z+z+z+z or 4 times z 1 solutions Answer 455586 by Alan3354(30993)   on 2013-05-14 17:03:31 (Show Source): You can put this solution on YOUR website! Is 4z equal to z+z+z+z or 4 times z Both, they're the same.

Exponential-and-logarithmic-functions/748638: Hello, any help to resolve this problem will be appreciated. The data points shown came from an experiment that involved tungsten (W) and iridium (Ir). Write the equation that expresses tungsten as a function of iridium: W = mIr + b Tungsten in grams (vertical): 20 40 60 80 100 Iridium in grams (horizontal): 2 4 6 8 10 If you need more information just let me know. Thanks 1 solutions Answer 455548 by Alan3354(30993)   on 2013-05-14 13:59:46 (Show Source): You can put this solution on YOUR website! The data points shown came from an experiment that involved tungsten (W) and iridium (Ir). Write the equation that expresses tungsten as a function of iridium: W = mIr + b Tungsten in grams (vertical): 20 40 60 80 100 Iridium in grams (horizontal): 2 4 6 8 10 ---------------------- W = 10Ir

Mixture_Word_Problems/748590: In a chemistry class, 3 liters of a 45 silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed? A: 0.5 L B: 1.5 L C: 3 L D: 2.5 L 1 solutions Answer 455533 by Alan3354(30993)   on 2013-05-14 11:46:01 (Show Source): You can put this solution on YOUR website! In a chemistry class, 3 liters of a 45 silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed? ---------------- Is it 45% ? You can't mix 45 & 10 to get 6. The result will always be between the 2 you start with.

Geometry_Word_Problems/748546: 100-gon with a radius of 5 what is the area 1 solutions Answer 455528 by Alan3354(30993)   on 2013-05-14 11:30:54 (Show Source): You can put this solution on YOUR website! 100-gon with a radius of 5 what is the area ===================== As the number of sides increases, the area approaches that of a circle. 100 is a lot of sides. Area =~ 78.54 sq units

Geometry_Word_Problems/748530: Use the following quadratic formula to answer the following equation: x= 3x^2+3x-3=0 x^2+14x-4=0 1 solutions Answer 455526 by Alan3354(30993)   on 2013-05-14 11:24:58 (Show Source): You can put this solution on YOUR website! 3x^2+3x-3=0 a = 3, b = 3, c = -3 or divide by 3 a = 1, b = 1, c = -1 Use the quadratic equation you entered. --------------- x^2+14x-4=0 Same thing.

pythagorean/748352: ummm... well... one side of the triangle is 60 cm which leads to a right angle on the other side which is 45 cm and the last side is C cm. I really need help I'm home schooled and my mom is to busy to help me. I'm completely new to this subject. Please help and if possible could some one explain it to me? 1 solutions Answer 455457 by Alan3354(30993)   on 2013-05-13 18:53:25 (Show Source): You can put this solution on YOUR website! one side of the triangle is 60 cm which leads to a right angle on the other side which is 45 cm and the last side is C cm. ------------- You didn't say what you want to do.

Triangles/748353: gate is three feet wide and five feet high need to cut a board that fits diagonlly across. how long should the board be? 1 solutions Answer 455455 by Alan3354(30993)   on 2013-05-13 18:46:15 (Show Source): You can put this solution on YOUR website! gate is three feet wide and five feet high need to cut a board that fits diagonlly across. how long should the board be? --------- Use Pythagoras.

Trigonometry-basics/748357: I was just wondering how you find the opposite side of the triangle if you are given the hypotenuse and theta? 1 solutions Answer 455454 by Alan3354(30993)   on 2013-05-13 18:45:08 (Show Source): You can put this solution on YOUR website! I was just wondering how you find the opposite side of the triangle if you are given the hypotenuse and theta? ---------- If you mean the side opposite angle theta, it's hyp*sin(theta)

test/748334: -x^3+2x^2 +48x 1 solutions Answer 455451 by Alan3354(30993)   on 2013-05-13 18:31:21 (Show Source): You can put this solution on YOUR website! -x^3+2x^2 +48x ---------- Do you have a question?

Human-and-algebraic-language/748299: Harry needs 10 liters of 20% solution. How many liters of 15% solutions and 35% solution will be needed to make the 20% solution? 1 solutions Answer 455450 by Alan3354(30993)   on 2013-05-13 18:28:19 (Show Source): You can put this solution on YOUR website! Harry needs 10 liters of 20% solution. How many liters of 15% solutions and 35% solution will be needed to make the 20% solution? ----------- 20% is the average of 15% and 35%, so it's equal amounts.

test/748332: How to solve 4 x^2 - 36 divided by 3-x 1 solutions Answer 455449 by Alan3354(30993)   on 2013-05-13 18:26:51 (Show Source): You can put this solution on YOUR website! How to solve 4 x^2 - 36 divided by 3-x ------------ There's no equal sign, so it's not an equation --> nothing to solve. ---- If you want to divide, factor the numerator.

logarithm/748344: 5 log^bq + 3log^by 1 solutions Answer 455447 by Alan3354(30993)   on 2013-05-13 18:25:40 (Show Source): You can put this solution on YOUR website! 5 log^bq + 3log^by ------------------- What does that mean? log of what to the power of b?

test/748347: 1 solutions Answer 455446 by Alan3354(30993)   on 2013-05-13 18:24:27 (Show Source): You can put this solution on YOUR website!

Polynomials-and-rational-expressions/748348: Is this equation correct: (x y)3 = x y3 ? Explain why. If it is correct, how can you prove this? If it is incorrect, what should be done to make it right? 1 solutions Answer 455445 by Alan3354(30993)   on 2013-05-13 18:21:37 (Show Source): You can put this solution on YOUR website! Is this equation correct: (x y)3 = x y3 ? No

logarithm/748325: log2(x-1) + log2(x-3)=3 I need to know what steps to take to get the answer. Thank you! 1 solutions Answer 455444 by Alan3354(30993)   on 2013-05-13 18:20:36 (Show Source): You can put this solution on YOUR website! log2(x-1) + log2(x-3)=3 I need to know what steps to take to get the answer. ------------ Step 1: Adding logs --> multiplication

Geometry_Word_Problems/748290: The volume of a room is 1,258 and three fifths cubic meters. The height of the room is 11 and three fifths meters. What is the area of the floor? 1 solutions Answer 455414 by Alan3354(30993)   on 2013-05-13 16:22:32 (Show Source): You can put this solution on YOUR website! The volume of a room is 1,258 and three fifths cubic meters. The height of the room is 11 and three fifths meters. What is the area of the floor? ----------------- Area = 1258.6/11.6 = 108.5 sq meters

Exponential-and-logarithmic-functions/748288: 1 solutions Answer 455412 by Alan3354(30993)   on 2013-05-13 16:18:47 (Show Source): You can put this solution on YOUR website! ----------- Sub u for 5^(x-1) u = 5u - 5 u = 5/4 ------- 5^(x-1) = 5/4 5^x = 25/4 x*log(5) = log(25/4) x = log(6.25)/log(5) x =~ 1.13864688

Graphs/748274: Find the equation of a parabola through each set of three points. You do NOT have to explain, please just give me your equation you got. I am just checking my answers :) . I appreciate you SOOO much for answering my questions. THANKS. 1. (1,5) (0,6) (2,3) 2. (-5,0) (0,0) (8,100) 3. (4,-4) (0,1) (3,-2) 4. (1,3) (6,0) (0,0) 5. (2,2) (5,-3) (0,-1) 6. (0,4) (4,0) (-4,4) THANKS SOO SO SO MUCH! :) 1 solutions Answer 455408 by Alan3354(30993)   on 2013-05-13 16:08:35 (Show Source): You can put this solution on YOUR website! Find the equation of a parabola through each set of three points. You do NOT have to explain, please just give me your equation you got. I am just checking my answers :) . I appreciate you SOOO much for answering my questions. THANKS. 1. (1,5) (0,6) (2,3) 2. (-5,0) (0,0) (8,100) 3. (4,-4) (0,1) (3,-2) 4. (1,3) (6,0) (0,0) 5. (2,2) (5,-3) (0,-1) 6. (0,4) (4,0) (-4,4) ======================= If you included your answers, you would get a quicker response.

Triangles/748282: What is the value for X if there's 60 Degress and 6.9? 1 solutions Answer 455405 by Alan3354(30993)   on 2013-05-13 16:06:37 (Show Source): You can put this solution on YOUR website! What is the value for X if there's 60 Degress and 6.9? --------------- Where is x?

Human-and-algebraic-language/748232: 1 solutions Answer 455402 by Alan3354(30993)   on 2013-05-13 15:46:42 (Show Source): You can put this solution on YOUR website!

Linear-equations/748270: x=7/2 1 solutions Answer 455401 by Alan3354(30993)   on 2013-05-13 15:44:09 (Show Source): You can put this solution on YOUR website! x=7/2 ----------- Ok then.

Quadratic_Equations/748269: I came across this question, and I got completely stuck. Please help? "A ball is thrown downward with an initial velocity of 21 meters per second from a cliff that is 90 meters high. The height of the ball is given by the quadratic equation h=-4.9t^2-21t+110 where h is in meters and t is the time in seconds since the ball was thrown. Find the time that the ball will be 60 meters from the ground. Round your answer to the nearest tenth of a second." 1 solutions Answer 455399 by Alan3354(30993)   on 2013-05-13 15:41:39 (Show Source): You can put this solution on YOUR website! h=-4.9t^2-21t+110 ------ h(t) = -4.9t^2 - 21t + 90 It starts at 90 m high, h(0) = 90, not 110 h(t) = -4.9t^2-21t + 90 = 60 solve for t -4.9t^2 - 21t + 30 = 0 Solved by pluggable solver: SOLVE quadratic equation (work shown, graph etc) Quadratic equation (in our case ) has the following solutons: For these solutions to exist, the discriminant should not be a negative number. First, we need to compute the discriminant : . Discriminant d=1029 is greater than zero. That means that there are two solutions: . Quadratic expression can be factored: Again, the answer is: -5.41612549639703, 1.13041121068274. Here's your graph: =================== Ignore the negative solution t = 1.13 seconds

Evaluation_Word_Problems/748230: Luke is riding his bicycle on a circular track. If he completes 10 revolutions in 5 minutes, what is his angular speed in radians per second? 1 solutions Answer 455373 by Alan3354(30993)   on 2013-05-13 13:50:54 (Show Source): You can put this solution on YOUR website! Luke is riding his bicycle on a circular track. If he completes 10 revolutions in 5 minutes, what is his angular speed in radians per second? ------------------ 10 revs = 10*2pi = 20pi radians 5 mins = 300 seconds w = 20pi/300 radians/sec = pi/15 rad/sec w =~ 0.2094 rad/sec

Travel_Word_Problems/748155: with a tail wind a light plane can fly 720 km in 2 hours going agaisnt the wind , the plane can fly the same distance in 3 hours . what is the wind and air speed 1 solutions Answer 455348 by Alan3354(30993)   on 2013-05-13 11:11:24 (Show Source): You can put this solution on YOUR website! with a tail wind a light plane can fly 720 km in 2 hours going agaisnt the wind , the plane can fly the same distance in 3 hours . what is the wind and air speed --------------- Find the 2 groundspeeds 720/2 = 360 km/hr 720/3 = 240 km/hr --- The plane's airspeed is the average of the 2 groundspeeds The windspeed is the difference between airspeed and groundspeed.

Trigonometry-basics/748008: Solve the triangle using the information given. b=2 c=3 B=40 degrees 1 solutions Answer 455278 by Alan3354(30993)   on 2013-05-12 22:33:17 (Show Source): You can put this solution on YOUR website! Solve the triangle using the information given. b=2 c=3 B=40 degrees --------------- If b is the opposite angle B, use the Law of Sines ----- sin(B)/b = sin(C)/c to find C Then A = 180 - (B+C) then sin(B)/b = sin(A)/a

test/747964: how do you find the percentage change of a word problem 1 solutions Answer 455277 by Alan3354(30993)   on 2013-05-12 22:18:37 (Show Source): You can put this solution on YOUR website! how do you find the percentage change of a word problem ----------- Once a problem is posted, it doesn't change --> 0%