##### 2.       A tank initially contains 120 L of pure water. A salt mixture containing a concentration of...

2.       A tank initially contains 120 L of pure water. A salt mixture containing a concentration of 1.5 g/L enters the tank at a rate of 2 L/min, and the well-stirred mixture leaves the tank at the same rate. Find an expression for the amount of salt in the tank at any time t. Also, find the limiting amount of salt in the tank as t →∞.

In: Math

##### Find the volume of the solid obtained by rotating the region bounded by y = x...

Find the volume of the solid obtained by rotating the region bounded by y = x 3 , y = 1, x = 2 about the line y = −3.

Sketch the region, the solid, and a typical disk or washer (cross section in xy-plane).

Show all the work and explain thoroughly.

In: Math

##### Find the present and future values of a constant income stream of $3000 per year over... Find the present and future values of a constant income stream of$3000 per year over a 13 year period at 5% annual interest compounded continuously. Round your answers to the nearest cent. In particular, ROUND your answer for the Present Value to the nearest cent BEFORE using it to compute the Future Value.

a) Present Value: $equation editor b) Future Value:$

equation editor

In: Math

##### a) Evaluate the limit lim x→0 tan(2x) / x b) Differentiate y = x^tan(x) c) Find...

a) Evaluate the limit lim x→0 tan(2x) / x

b) Differentiate y = x^tan(x)

c) Find the equation of the tangent line to 4x^2 + 2xy−y^2 = 4 at the point (1, 2).

d) Differentiate f(x) = arctan(x^2 + 1)

e) Differentiate f(x) = ln(cosh x)

Thank you!

In: Math

##### (a) Find the exact length of the curve y = 1/6 (x2 + 4)(3/2) , 0...

(a) Find the exact length of the curve y = 1/6 (x2 + 4)(3/2) , 0 ≤ x ≤ 3. (b) Find the exact area of the surface obtained by rotating the curve in part (a) about the y-axis.

I got part a I NEED HELP on part b

In: Math

##### 7) Determine the equations of the lines tangent to the graph of 9?2 + 4?2 +...

7) Determine the equations of the lines tangent to the graph of 9?2 + 4?2 + 18? − 16? − 11 = 0 at the points where x = 0. Where do these two lines
intersect?

In: Math

##### Find an equation of the tangent line to the curve cos ( x ) + 11...

Find an equation of the tangent line to the curve cos ( x ) + 11 y ^2 = x y ^3 + 34 at the point ( 0 , √ 3 ) . Assume that y is a function of x . Express all numbers in exact form and write the equation of the tangent line in terms of x and y .

In: Math

##### The function F(x) = x2 - cos(π x) is defined on the interval 0 ≤ x...

The function F(x) = x2 - cos(π x) is defined on the interval 0 ≤ x ≤ 1 radians. Explain how the Intermediate Value Theorem shows that F(x) = 0 has a solution on the interval 0 < x < .

In: Math

##### Consider a continuous, integrable, twice-differentiable function f with input variable x. In terms of the units...

Consider a continuous, integrable, twice-differentiable function f with input variable x.

In terms of the units of f and the units of x, choose the units of each function or expression below:

(a) The units of f ' are

the units of

f

the units of

x

(the units of f)(the units of x

)

 the units of f the units of x

 the units of f (the units of x)2

 the units of f (the units of x)3

(b) The units of f '' are

the units of

f

the units of

x

(the units of f)(the units of x

)

 the units of f the units of x

 the units of f (the units of x)2

 the units of f (the units of x)3

(c) The units of

 b f(x)dx a

are

the units of

f

the units of

x

(the units of

f

)(the units of

x

)

 the units of f the units of x

 the units of f (the units of x)2

 the units of f (the units of x)3

(d) The units of

 b f '(x)dx a

are

the units of

f

the units of

x

(the units of

f

)(the units of

x

)

 the units of f the units of x

 the units of f (the units of x)2

 the units of f (the units of x)3

(e) The units of

 n f(xi)Δx i=1

are

the units of

f

the units of

x

(the units of

f

)(the units of

x

)

 the units of f the units of x

 the units of f (the units of x)2

 the units of f (the units of x)3

(f) The units of

 f(b)−f(a) b−a

are

the units of

f

the units of

x

(the units of

f

)(the units of

x

)

 the units of f the units of x

 the units of f (the units of x)2

 the units of f (the units of x)3

(g) The units of

 d dx
 x f(t)dt a

are

the units of

f

the units of

x

(the units of

f

)(the units of

x

)

 the units of f the units of x

 the units of f (the units of x)2

 the units of f (the units of x)3

(h) The units of

 d2 dx2
 x f(t)dt a

are

the units of

f

the units of

x

(the units of

f

)(the units of

x

)

 the units of f the units of x

 the units of f (the units of x)2

 the units of f (the units of x)3

(i) The units of h in

 f(a+h)−f(a) h

are

the units of

f

the units of

x

(the units of

f

)(the units of

x

)

 the units of f the units of x

 the units of f (the units of x)2

 the units of f (the units of x)3

In: Math

##### The principal value of tan-1(tan 3π/5) is (a) 2π/5 (b) -2π/5 (c) 3π/5 (d) -3π/5

The principal value of tan-1(tan 3π/5) is _____________.

(a) 2π/5

(b) -2π/5

(c) 3π/5

(d) -3π/5

In: Math

##### Find the area enclosed by the curves, x + y = 8 and x = y^2...

Find the area enclosed by the curves, x + y = 8 and x = y^2 − 4y + 4.

In: Math

##### Use the Divergence Theorem ∬SF⋅dS=∭D∇⋅FdV to find ∬SF⋅dS where F(x,y,z)=x^2i+y^2j+z^2k and S S is the surface...

Use the Divergence Theorem ∬SF⋅dS=∭D∇⋅FdV to find ∬SF⋅dS where F(x,y,z)=x^2i+y^2j+z^2k and S S is the surface of the solid bounded by x^2+y^2=9 , z = 0 , and z=6

In: Math

##### *Calc 3 multivariable question* Find the surface area of paraboloid z=3-2x2-2y2 the paraboloid lies above the...

*Calc 3 multivariable question*

Find the surface area of paraboloid z=3-2x2-2y2

the paraboloid lies above the xy plane

In: Math

##### Partial Fractions: Problem 2 Use the method of partial fraction decomposition to write the following rational...

Partial Fractions: Problem 2

Use the method of partial fraction decomposition to write the following rational expression as the sum of simpler rational functions whose denominators are polynomials of degree 1.

−20x+20/x^2−x−56=

In: Math

##### Find the solution of the Cauchy problem for the differential equationy" + 2y' + y =...

Find the solution of the Cauchy problem for the differential equationy" + 2y' + y = e–x cos x

subject to the initial conditions: y(0) = 0, y'(0) = 1.
Verify the solution obtained by direct substitution into the equation and confirm that it satisfies the initial condition.

In: Math