Thursday
March 5, 2015

Posts by tony


Total # Posts: 839

Pipeline design
Sketch a preliminary layout for the following heat exchanger systems. On the layout sketch indicate pipe work manifolds, access platforms, access for construction, operations and maintenance. In your answer we are looking for thought into the relative sizes of these heat ...
November 14, 2013

cal
A conical tank (with vertex down) is 12 feet across the top and 18 feet deep. If water is flowing into the tank at a rate of 18 cubic feet per minute, find the rate of change of the depth of the water when the water is 10 feet deep. I got 81/200pi ft/min.
November 2, 2013

US History Mrs. Sue
Select the group that best embraced the beliefs of Abraham Lincoln. Abolitionists or The Free Soil Party. Is it Abolitionists.
October 31, 2013

math
A box of chalk and 2 staplers cost $10. Three boxes of chalk and 2 staplers cost $18. Find the total cost of 1 box of chalk and 1 stapler.
October 27, 2013

physics
suppose the diver vaults off the springboard, leaving it with an initial speed of 3.50 m/s upward. use energy conservation to find his spped when he strikes the water.
October 23, 2013

math
I need help on study links 2.9 for 5 grade
October 10, 2013

science
light has what range of wavelength
October 4, 2013

Calculus
so answer would be none or nowhere.
September 24, 2013

Calculus
g(x)= {0 if x<0 {x^3-3x if 0≤x≤3 {3 if x>3 If it was like this one. Then what? Same
September 24, 2013

Calculus
g(x)= {0 if x<0 {x^2-2x if 0≤x≤2 {2 if x>2 Find all values x=a where the function is discontinuous. Is the answer 0 and 2 or just 2?
September 24, 2013

Calculus
So not continuous at x=-8 and function is not defined right.
September 24, 2013

Calculus
f(x)= |x−8| / x+8 Is the function is not continuous at x= -8,8 or just at -8.
September 24, 2013

Calculus
So the function is defined or not defined.
September 24, 2013

Calculus
f(x)= ⎨x^2-1 / x+1, for x not = -1 ⎨8, for x=-1 I'm trying to graph and determine the values of x for which the function is continuous. Does the graph looks like a u shape opening up or a line.
September 24, 2013

Lubrication
A pump fitted with 50mm bore ball bearings uses an oil whose viscosity ranges from 100cSt at cold pump start-up to 7.5Cst when running at maximum speed and load. If these viscosities are the safe limits for the oil, specify the maximum start-up speed and the maximum running ...
September 23, 2013

Calculus
Find the limit. lim x→1 x^4-5x^3+7x^2-6x+3 / x-1
September 22, 2013

Calculus
Also suppose If lim x→6 had been lim x→5 would that had been changed the answer. Or it would be same.
September 22, 2013

Calculus
My fault. Sorry about that. Thank you
September 22, 2013

Calculus
4^9 = 262144 Is this the answer!! I got 3.
September 22, 2013

Calculus
Give an appropriate answer. Let lim x→6 f(x)=81. Find lim x→6 4^√f(x).
September 22, 2013

Mechanics
In a direct acting pressure relief valve, 64 bar pressure is acting on the conical dart seating area and the dart is kept closed by a spring force of 50 kg opposing the pressure. (5) a) Determine the bore diameter on the seat. b) What will the spring force be if a pressure of ...
August 21, 2013

Algebra
center is (-4,3)
July 28, 2013

Algebra
Find center, vertices, foci. (x+4)^2/36 + (y-3)^2/100 =1
July 28, 2013

Business Statistics
a sample of 16 people reveals the mean consumption to be 60 gallons with the standard of deviation of 20 gallons
July 28, 2013

trig
Given that P=(-1,8) and Q=(-2,1), find the component form and magnitude of the vector 3 PQ.
July 28, 2013

business math
If you can earn 5%, how much will you have to save each year if you want to retire in 35 years with $1 million?
July 23, 2013

trig
tan(7π/4) + tan(5π/4) Does this = 0
July 18, 2013

trig
Simplify: csc^2 x sec x / sec^2 x + csc^2 x
July 16, 2013

Algebra
Determine whether the equation defines y as a function of x. y=-17
July 15, 2013

trig
tan (pi/2 - x) = sin (pi/2 - x) / cos (pi/2 - x) But sin (pi/2 - x) = cos x and cos (pi/2 - x) = sin x <=> tan (pi/2 - x) = cos x / sin x = cotan x <=> tan (pi/2 - x) * tan x = cotan x * tan x = (cos x / sin x) * (sin x / cos x) = 1
July 14, 2013

trig
simplify the expression. tan(π/2-x)tanx
July 14, 2013

trig
simplify the expression. cos^2x+sin^2x/cot^2x-csc^2x
July 14, 2013

trig
But my teacher gave the answer on the review as -1.
July 14, 2013

trig
simplify the expression. -sin^2x-cos^2x
July 13, 2013

trig
use basic identities to simplify the expression. csc θ cot θ / sec θ
July 13, 2013

Algebra
Determine whether the equation defines y as a function of x. y= -16
July 12, 2013

statistics
Investment analysts generally believe the interest rate on bonds is inversely related to the prime interest rate for loans; that is bonds perform well when lending rates are down and perform poorly when interest rates are up. Can the bond rate be predicted by the prime ...
July 8, 2013

statistics
Suppose a researcher gathered survey data from 19 employees and asked the employees to rate their job satisfaction on a scale from 0 to 100 (with 100 being perfectly satisfied). Suppose the following data represent the results of this survey. Assume that relationship with ...
July 8, 2013

statistics
Y=71745-678.964x =6495.786 So for 2012, y (8) = -972.77
July 8, 2013

statistics
Shown below are rental and leasing revenue figures for office machinery and equipment in the United States over a sever-year period according to the U.S. Census Bureau. Use these data to run a linear regression and then forecast the rental and leasing revenue for the year 2012...
July 8, 2013

college algebra: probability and statistics
50%
June 30, 2013

pre cal
x^2(4x^2+1)^7(76x^2+3)
June 30, 2013

Maths
what is the max value of y=x^22/10x^logx
June 30, 2013

trig
Write the complex number in trigonometric form, using degree measure for the argument. -12 - 16i
June 28, 2013

trig
Convert the rectangular coordinates to polar coordinates, using radian measure for the angle. (6, -6) 6√(2),7π/4 OR -6√(2),5π/4
June 28, 2013

trig
Solve the equation. Express your answer in trigonometric form. x^5 - 11 = 0
June 28, 2013

trig
Find the indicated roots. Write the answer in trigonometric form. Fourth roots of 256(cos 220° + i sin 220°)
June 28, 2013

trig
Use De Moivre's theorem to simplify the expression. Write the answer in a + bi form. [2(cos 240° + i sin 240°)]^5
June 28, 2013

trig
Find the dot product a*b. a= (5,-9), b=(4,-3)
June 28, 2013

trig
estimate the components of the vector. Round to one decimal place. [v] = 33.9, θ = 65.9° Find the horizontal and vertical components of v, and write in component form.
June 28, 2013

trig
find the indicated vector. let u = (-9,1), v=(-5,9). Find 3u+v
June 28, 2013

trig
Find z1z2 and z1/z2 for the pair of complex numbers using trigonometric form. z1=4+9i, z2=-5-5i I got z1z2 = 25-65i But cannot find the z1/z2.
June 26, 2013

trig
slove the equation exactly over the interval [0, 2pi) sinx=1-2sin^2x
June 21, 2013

trig
use an identity to write the expression as a single trignometric function. squ root 1-cos48°/2
June 21, 2013

trig
choose the expression that is equivalent to the given expression. 2 cos^2 4x-1
June 21, 2013

trig
Use the fundamental identities to simplify the expression. cos^2θ/sin^2θ+cscθsinθ I got tan^2theta
June 21, 2013

trig
i got it now. thanks
June 21, 2013

trig
so the answer is 330
June 21, 2013

trig
fidn all values of tehta in [0, 360) that satisfy the equation. √(3)tan(θ/2)=-1 I have four choices 300, 330, 150 , 120 and i got 120
June 21, 2013

trig
Multiply and simplify. (cos x - sin x)^2
June 21, 2013

trig
Choose the expression that is equivalent to the given expression. sin 6x tan 3x I got 2 sin^2 3x
June 21, 2013

trig
Write the expression as the sine, cosine, or tangent of a double angle. Then find the exact value of the expression. 2tan 2pi/3 / 1-tan^2 2pu/3
June 21, 2013

trig
Solve the right triangle with the given sides and angles. a = 3.0, B = 31.0°
June 21, 2013

math
2. The sales tax rate applied to all purchases within a state was 0.04 (4 percent) throughout 2006 but increased to 0.05 (5 percent) during all of 2007. The state government collected all taxes due, but its tax revenues were equal to $40 million each year. What happened to ...
June 20, 2013

math
Market price with no tax is where supply equals demand, so at $7. b) The two dollar tax is reflected in the price that people have topay, but it does not give a firm extra income. For instance, pricewas $7 in part a. Now with the tax, people pay $9, but the firmonly earns $7. ...
June 20, 2013

Physics
Calculate the change in potential energy of a 86.9 kg man when he takes an elevator from the first floor to 15th floor, if the distance between floors is 4.47 m. *This building has a thirteenth floor! Keep in mind that he stands on the floor of the top floor, not its ceiling!
June 18, 2013

Calculus
An arithmetic progression has terms a8 =23 and a20 =83 . What is the value of the term a12
June 18, 2013

trig
Find all values of ¸ in [0°, 360°) that satisfy the equation. 2 sin 2θ - √(3) = 0
June 17, 2013

trig
Find all real numbers in [0, 2π) that satisfy the equation. cos 2x = √(2)/2
June 17, 2013

trig
Find all angles in degrees that satisfy the equation. Round approximate answers to the nearest tenth of a degree. tan α = -1.85
June 17, 2013

trig
Use a sum or difference identity to find the exact value. tan 25deg + tan 5deg / 1-tan 25deg tan 5deg
June 17, 2013

trig
Find cos(A+B). cos A=1/3 and sin B=-1/2, with A in quadrant I and B in quadrant IV.
June 16, 2013

Trigonometry
In a triangle ABC, if 2sinB=sinA+sinC and sides a+c=70, what is side b?
June 16, 2013

trig
for the given angle, name the quadrant in whihc the terminal side lies. -350deg
June 12, 2013

trig
identify the quadrant in which 0 lies. sin < 0 and sec > 0
June 12, 2013

trig
determine the period of the function. y = cot 4t
June 12, 2013

trig
Identify the quadrant in which θ lies. sin > 0 and tan < 0
June 11, 2013

trig
Find the trigonometric function value of angle θ. Cos θ = 2/7 and θ is in quadrant IV. Find sin θ.
June 11, 2013

trig
The point (-3, 4) is on the terminal side of angle θ in standard position. Find cot θ.
June 11, 2013

trig
Given that θ is an angle in standard position whose terminal side contains the given point, provide the exact value of the indicated function. (-2, -3) Find sec θ.
June 11, 2013

Polynomials
The polynomial P(x)=ax^3+bx^2+cx+d leaves a remainder of 10x+11 when it is divided by x^2−1. It leaves a remainder of −6 when it is divided by x^2+x+1. What is the value of bc−ad
May 24, 2013

Complex numbers
If f(x) is a polynomial with real coefficients such that f(4+3i)=31+16i, then f(4−3i)=a+bi. What is the value of a+b
May 24, 2013

Maths
thank you very much
May 23, 2013

Maths
A and B are real numbers such that the two quadratic equations 19x^2+3x+2=0 and Ax^2+Bx+7=0 have a common root. What is the value of A+B
May 23, 2013

Trigonometry
What is the maximum integer value of x, where x<200, that satisfies the following inequalities: sin(90+180x/100)<0 and tan(180−180x/100)<0 ?
May 23, 2013

Algebra
you mean 527. Thanks a lot
May 23, 2013

Algebra
f(x)is a monic cubic polynomial with real coefficients. f(x) has 7+4i as a root and f(0)=−2145 . What is the coefficient of x in f(x) ?
May 23, 2013

Maths
The roots of the polynomial f(x)=7x^2 +38x+c=0 are reciprocals of each other. What is the value of c ?
May 22, 2013

MATHS
558
May 21, 2013

Math- 5th grade
1/60
May 21, 2013

Math
2/5 of 5 is 2, so 5-2=3 left
May 21, 2013

Calculus II
1.125
May 20, 2013

math
235/99
May 20, 2013

Maths
How many rational numbers in the interval (0,1) , when expressed in lowest terms, have denominators less than or equal to 10
May 20, 2013

heeeeeeeeeeeeeelp Physics
Finally 0.572 is correct
May 20, 2013

MATHS
Already answered. 21^2=441
May 17, 2013

geometry
81
May 17, 2013

Geometry
39
May 16, 2013

Calculus
If polynomial functions f(x) and g(x) satisfy d/dx {f(x)g(x)}=2x , f(0)=−3 , and g(0)=3,what is f(10)g(10) ?
May 13, 2013

Algebra
468
May 6, 2013

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