Rachal
Popular questions and responses by Rachal
Trig
How can I find the exact value of Sin 480 degrees? Thanks
asked on May 12, 2011 
Algebra
Miguel is choosing between two exercise routines. In Routine #1, he does only running, burning 15 calories per minute. In Routine #2, he burns 12 calories walking. He then runs at a rate that burns 12 calories per minute. For what amounts of time spent
asked on May 18, 2011 
Algebra
Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 25 liters per minute. There are 700 liters in the pond to start. Let W represent the amount of water in the pond (in liters), and let T represent the number
asked on May 12, 2011 
Algebra
Below is the graph of a polynomial function f with real coefficients. Use the graph to answer the following questions about f. All local extrema of f are shown in the graph. I really need help with this one but I can't post the graph.
asked on February 4, 2011 
Algebra
Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 4L, the pressure is 165 kPa(kilopascals). What is the volume when the pressure is 60 kPa?
asked on June 7, 2011 
Algebra
Find the equation of the quadratic function f whose graph is shown below. Ponts on the graph are (3,1)(2,4) f(x)=
asked on January 25, 2011 
Algebra
Miguel is choosing between two exercise routines. In Routine #1, he does only running, burning 15 calories per minute. In Routine #2, he burns 12 calories walking. He then runs at a rate that burns 12 calories per minute. For what amounts of time spent
asked on May 18, 2011 
Algebra
A 3 inch thick slice is cut off the top of a cube, resulting in a rectangular box that has volume 128in^3 .Round your answer to two decimal places
asked on February 4, 2011 
Trig
Use a cofunction to write an expression equal to csc(4ð/11). I need help solving this problem. Thank You
asked on May 11, 2011 
Math
A department store is holding a drawing to give free shopping sprees to two lucky customers. There are 15 customers who have entered the drawing: 4 live in the town of Gaston, 6 live in Pike, and 5 live in Wells. In the drawing, the first customer will be
asked on February 21, 2011 
Algebra is my answer right
Choose the end behavior of the graph of each polynomial function. A f(x)= 5x^34x^2+8x+5 B f(x)= 4x^6+6x^46x^32x^2 C f(x)= 2x(x1)^2(x+3) A= falls to the left and rises to the right B= Falls to the left and right C=Rises to the right and left.
asked on February 3, 2011 
Trig
Find all solutions of the equation in the interval [0,2pi). sqrt(3)cottheta1= 0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.
asked on May 15, 2011 
Algebra
The number of bacteria in a certain population increases according to an exponential growth model, with a growth rate of 11% per hour. An initial sample is obtained from this population, and after four hours, the sample has grown to 4130 bacteria. Find the
asked on February 3, 2011 
Algebra
Austin is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges $104.00 and allows unlimited mileage. Company B has an initial fee of $65.00 and charges an additional $.60 for
asked on May 18, 2011 
prealgebrais my answer right
Rewrite the expression without using a negative exponent. 4z^4 Simplify your answer as much as possible. is this right? (1/4z^4)
asked on February 9, 2011 
Physics
Boyle's Law says that the volume of a gas varies inversely with the pressure. When the volume of a certain gas is 4L , the pressure is 165kPa (kilopascals). What is the volume when the pressure is 60kPa?
asked on May 23, 2011 
Trig
Find all solutions of the equation in the interval [0,2pi) . cos(theta)=0.7125 If there is more than one solution, separate them with commas. Do not round any intermediate computations, and round your answer(s) to the nearest hundredth. Can someone help me
asked on May 15, 2011 
Math
You can answer any 8 questions from the 12 questions on an exam. In how many different ways can you choose the 8 questions, assuming that the order in which you choose the questions is irrelevant?
asked on February 10, 2011 
Math
Suppose that 34% of the people who inquire about investments at a certain brokerage firm end up investing in stocks, 30% end up investing in bonds, and 35% end up investing in stocks or bonds (or both). What is the probability that a person who inquires
asked on February 10, 2011 
Trig Check my answer Please
Use a cofunction to write an expression equal to csc(4ð/11). Is the answer csc(4ð/11)= 1/sin(4ð/11)
asked on May 11, 2011 
AlgebraI'm still stuck
The onetoone function f is defined by f(x)=(4x1)/(x+7). Find f^1, the inverse of f. Then, give the domain and range of f^1 using interval notation. f^1(x)= Domain (f^1)= Range (f^1)= Any help is greatly appreciated. Algebra  helper, Wednesday,
asked on February 3, 2011 
Algebra is my answer right
Charlie is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges $127 and allows unlimited mileage. Company B has an initial fee of $55.00 and charges an additional $0.90 for
asked on February 5, 2011 
Algebra
Find a polynomial f(x) of degree 3 with real coefficients and the following zeros. 1,3+i f(x)=
asked on May 17, 2011 
Math ratio word problem
The ratio of horseshoes to shamrocks was 11 to 5, and two times the number of shamrocks was 12 less than the number of horseshoes. How many were shamrocks? thank you :)
asked on January 3, 2009 
Math 10
Cashew nuts are sold at 15 per kg. Walnuts are sold at 12 per kg. What quantities of each nut would a store owner put into a 100kg barrel so that it could be sold for 13.20 per kg?
asked on June 1, 2016 
Trig Check my answer Please
Find the reference angle for 144 degrees. I'm coming up with 504 degrees, but I think I'm missing a step.
asked on May 14, 2011 
Statistics I'm stuck and its due tonight
In a particular hospital, 6 newborn babies were delivered yesterday. Here are their weights (in ounces): 112, 96, 109, 126, 99, 106 Assuming that these weights constitute an entire population, find the standard deviation of the population. Round your
asked on February 13, 2011 
Algebra I get 1 out of two parts
Owners of a recreation area are filling a small pond with water. They are adding water at a rate of 25 liters per minute. There are 700 liters in the pond to start. Let W represent the amount of water in the pond (in liters), and let T represent the number
asked on May 11, 2011 
Algebra is my answer right
The onetoone function f is defined by f(x)=(4x1)/(x+7). Find f^1, the inverse of f. Then, give the domain and range of f^1 using interval notation. f^1(x)= Domain (f^1)= Range (f^1)= Any help is greatly appreciated. Algebra  helper, Wednesday,
asked on February 2, 2011 
Algebra
Ok I got another one I can figure out The onetoone function f is defined by f(x)=(4x1)/(x+7). Find f^1, the inverse of f. Then, give the domain and range of f^1 using interval notation. f^1(x)= Domain (f^1)= Range (f^1)= Any help is greatly
asked on February 2, 2011 
Algebra
Multiply. x(6+2i)][x(62i)] Note that these expressions contain complex numbers. Simplify your answer as much as possible.
asked on January 23, 2011 
Math
The following is a list of 11 measurements: 2,82,87,1,51,2,53,87,20,32,35 Suppose that these 11 measurements are respectively labeled. x1,x2¡¦¡¦¡¦¡¦¡¦x11.(Thus,2 is labeled x1,82 is labeled x2 and so on.) find ¢²_(i=1)^11¢Æx1/49 Round
asked on February 8, 2011 
Math
Charlie is going to rent a truck for one day. There are two companies he can choose from, and they have the following prices. Company A charges $127 and allows unlimited mileage. Company B has an initial fee of $55.00 and charges an additional $0.90 for
asked on February 5, 2011 
Algebra
Solve for v. v+6/5=3/5v7/3 Simplify your answer as much as possible. This answer cannot be a radical. Thanks
asked on January 23, 2011 
Algebra
The function h is defined by h(x) . 6+x/4+2x Find h(2x)
asked on January 23, 2011 
Algebra
The function h is defined by h(x) . 6+x/4+2x Find h(2x)
asked on January 23, 2011 
Math
Frank has a 65% chance of receiving an A grade in geology, a 60% chance of receiving an A grade in mathematics, and a 77% chance of receiving an A grade in geology or mathematics (or both). Find the probability that he receives A grades in both geology and
asked on February 12, 2011 
Algebra
Find all complex solutions of 4x^2+5x+2=0.
asked on February 3, 2011 
Math
Solve for x. 14^(3x)=11^(x3) Write the exact answer using base10 logarithms How do I start this problem? Thank You
asked on February 16, 2011 
Algebra
I don't even know where to start, teacher gave us this with no direction. Suppose the polynomial R(x)=a9x^9+a8x^8+...+a,x+a0 has real coefficients with a9 cannot equal 0. Suppose also that R(x)has the following zeros: 5, 6, 5+5i. Using this information,
asked on February 4, 2011 
Algebra
To rent a certain banquet hall, there is a reservation fee of $4200.00 and an additional fee of $180.00 per hour. The Russell family wants to spend at most $5100.00 on renting the hall. What are the possible amounts of time for which they could rent the
asked on January 23, 2011 
Trig Check my answer Please
Find the unit vector in the direction of . Do not approximate any numbers in your answer. I get (1/sqrt10) and (3/sqrt10)
asked on May 14, 2011 
Math
Solve for x. log3(x+7)=2log3(x1) Write the exact answer using base10 logarithms.
asked on February 15, 2011 
Statistics  can someone check me
Frank has a 65% chance of receiving an A grade in geology, a 60% chance of receiving an A grade in mathematics, and a 77% chance of receiving an A grade in geology or mathematics (or both). Find the probability that he receives A grades in both geology and
asked on February 12, 2011 
Mathword problem
To rent a certain banquet hall, there is a reservation fee of $4200.00 and an additional fee of $180.00 per hour. The Russell family wants to spend at most $5100.00 on renting the hall. What are the possible amounts of time for which they could rent the
asked on January 24, 2011 
Math
Suppose that the number of bacteria in a certain population increases according to an exponential growth model. A sample of 2600 bacteria selected from this population reached the size of 2873 bacteria in two and a half hours. Find the continuous growth
asked on February 21, 2011 
Statisticsdesperate
I don't know how to post some of the question is there a way I can upload it?
asked on February 9, 2011 
beginning algebra
The length of a rectangle is 1ft more than twice its width, and the area of the rectangle is 28ft^2 . Find the dimensions of the rectangle. l= w=
asked on February 9, 2011 
Trig
A ramp 38' long rises to a platform. The bottom of the platform is 20' from the foot of the ramp. Find x , the angle of elevation of the ramp. Round your answer to the nearest hundredth of a degree. After this question I'm done with TRIG!!! Thanks
asked on May 15, 2011 
intermediate algebracan somebody check my answer
Evaluate the expression m^2+93+7 when m=4 4^2+9*(4)+7 does it = 13
asked on February 15, 2011 
Algebra
The polynomial function is defined by f(x)=4x^4+2x^38x^5x+2. Use a calculator to find all the points (x,f(x)) where there is a local maximum. Round to the nearest hundredth.
asked on May 18, 2011 
Trig
I need help, I don't remember what to do. Find all solutions of the equation in the interval [0,2pi]. (2cosè+sqrt3)(cscè+1)=0 Write your answer in radians in terms of pi. If there is more than one solution, separate them with commas.
asked on May 14, 2011 
Math
Can anybody help me start this? Thanks
asked on February 15, 2011 
intermediate algebra
Write the equation of the line: The points are at (8,6) and (0,0). The line passing through these two points has a yintercept of 0 since it passes through the origin. The slope is 60/80=3/4 How would I finish this? Thanks
asked on February 15, 2011 
Trig
I need help solving the two problems below. Thanks For each equation, determine whether its graph is symmetric with respect to the axis, the axis, and the origin. Check all symmetries that apply. 1. y=ã(4x^(2)) 2. 34x^(2)+12y^(2)=18
asked on May 13, 2011 
math check me
Solve the inequality for x. 16 =3 Is that right?
asked on February 15, 2011 
Physics
In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 8A (amperes), the resistance is 15 ohms. What is the current when the resistance is 4 ohms?
asked on February 9, 2011 
beginning algebra
In an electrical circuit, the current passing through a conductor varies inversely with the resistance. Suppose that when the current is 8A (amperes), the resistance is 15 ohms. What is the current when the resistance is 4 ohms?
asked on February 8, 2011 
Algebra
Graph the equations y=2x5+2
asked on January 26, 2011 
Math
The polynomial function f is defined by f(x)x^43x^32x^2+4x+5. Use a graphing calculator to find all the points (x,f(x)) where there is a local maximum. Round to the nearest hundredth
asked on January 25, 2011 
Algebra
The function g is defined below. g(x)=((x)^(2)9x+14)/((x)^211x+24) Find all values of x that are NOT in the domain of g. If there is more than one value, separate them with commas.
asked on June 8, 2011 
Algebra
The function h is is defined below. h(x)=48x^2+ 12x  16 Find all values of x that are NOT in the domain of h. If there is more than one value, separate them with commas. I'm lost.
asked on May 18, 2011 
Trig
I need help solving the two problems below. Thanks For each equation, determine whether its graph is symmetric with respect to the axis, the axis, and the origin. Check all symmetries that apply. 1. y=sqrt(4x^(2)) 2. 34x^(2)+12y^(2)=18
asked on May 13, 2011 
math check me
f(x)=3 411+x 411+3 48 Do I divide or multiply?
asked on February 15, 2011 
Math
Evaluate the following: 6105 I get: 45 45 Is the answer 1
asked on February 15, 2011 
beginning algebra
Factor: 8w+uw+vu8v
asked on February 8, 2011 
Algebra is my answer right
Solve the following inequality. (x4)/(x+2)>0 Write your answer using interval notation. x4 Thanks
asked on February 2, 2011 
beginning algebracheck my answer
[(x^21)/(x3)] / [(x^2x2)/(3x9)] I get (3x3/x2)
asked on February 8, 2011 
Algebra
The polynomial function f is defined by f(x)x^43x^32x^2+4x+5. Use a graphing calculator to find all the points (x,f(x)) where there is a local maximum. Round to the nearest hundredth.
asked on January 24, 2011 
intermediate algebra
Write the equation of the graph. Points are (8,6) and (0,0). I think you start at rise over run. But I'm confused thanks
asked on February 15, 2011 
Trig
The polynomial function f(x) is defined by f(x)=4x^4+9x^3+2x^27x2. Use a graphing calculator to find all the points where there is a local minimum. Round to the nearest hundredth.
asked on May 15, 2011

Algebra
Thanks!
posted on June 8, 2011 
Algebra
The function h is is defined below h(x)=(x+6)/(x^2+9x+8) Find all values of x that are NOT in the domain of h. If there is more than one value, separate them with commas.
posted on May 18, 2011 
Trig
thanks!
posted on May 14, 2011 
Trig Check my answer Please
I now think its 36 degrees
posted on May 14, 2011 
Trig
Thanks!!!!
posted on May 14, 2011 
Trig
thats supposed to be a neg in front of the 4 in problem 1.
posted on May 13, 2011 
Trig
Thank you I see where I got stuck
posted on May 13, 2011 
Math
I got: 2873 = 2600 e^(2.5r) ln(2873 / 2600) = 2.5r [ln(2873 / 2600)] / 2.5 = r r=0.0399381 it says to round the percentage to the nearest hundreth. any help
posted on February 21, 2011 
Math
I got 2/21 thanks for the input
posted on February 21, 2011 
Math
I figured it out. Equation: time + time = 60 hrs.  x/30 + (1425x)/15 = 60  x + 2*1425 2x = 30*60  x = 1050 x = 1050mL  x/30 = 35 hrs (time of 1st storm)  (1425x)/15 = 375/15 = 25 hr (time of 2nd storm)
posted on February 15, 2011 
Math
Thank You
posted on February 15, 2011 
Math
I get this but i can't remember what else I do The "AND" are is shared. This is the key. Abandoning the lengthy names: A + S = 0.34 ==> S = 0.34  A A + B = 0.30 ==> B = 0.30  A S + B  A = 0.35
posted on February 10, 2011 
Statisticsdesperate
Its impossible I have alrady tried and it inserts funky symbols
posted on February 9, 2011 
prealgebrais my answer right
thank you
posted on February 9, 2011 
Physics
E=IR E=15*8 E=120V  I=E/R I=120/4 I=30 amperes
posted on February 9, 2011 
Math
I get add 2,82,87,1,51,2,53,87,20,32,35=300 300/49=6.12244 Round two decimals = .061244 or 61.22? I don't know which way I should go.
posted on February 8, 2011 
beginning algebra
Well this is a question within the subject I posted. Sorry for not labeling it right
posted on February 8, 2011 
Algebra is my answer right
if the answer should be m
posted on February 5, 2011 
Math
a=127 b=55+.9m 127=55+.9m 72=.9m m=80
posted on February 5, 2011 
Algebra
Thanks
posted on February 3, 2011 
Algebra is my answer right
Got it thanks
posted on February 3, 2011 
AlgebraI'm still stuck
I want to thank all of you for taking the time to help me understand the problem
posted on February 3, 2011 
Algebra
I don't know if this is right but this is what I came up with. f^1=(7x+1)/(x4) domain f(^1)=(inf,7)U(7,inf) range f(^1)=(inf,4)U(4,inf) Let me know if it looks right. Thanks
posted on February 2, 2011 
Algebra
I don't understand what else do I need to do?
posted on January 25, 2011 
Mathword problem
I got Let t = number of hours hall is rented then 180t + 4200
posted on January 24, 2011 
Algebra
thanks
posted on January 23, 2011