Explore BrainMass
Share

Explore BrainMass

    Basic Calculus

    Mathematics - Calculus - Rate measures

    A plane flying at an altitude of 25,000 ft. has a defective airspeed indicator. To determine her speed, the pilot sights a fixed point on the ground. At the moment when the angle of depression (From the horziontal) of her line of sight is 65 degrees, she notes that this angle is increasing at 1.5 degrees per second. What is the

    Calculus

    A large storage tank, open to the atmosphere at the top and filled with water, develops a small hole in its side at a point 16.0 m below the water level. If the rate of flow from the leak is 2.50 x 10^ -3 m^3/ min, determine (a) the speed at which the water leaves the hole and (b) the diameter of the hole.

    Mathematics - Calculus - Exponential Functions

    A cancer patient undergoing chemotherapy is injected with a particular drug. The function D(h)=4e^-0.35h gives the number of milligrams D of this drug that is in the patient's blood stream h hours after the drug has been administered. How many milligrams of the drug were injected? To the nearest milligram, how much of the drug w

    Mathematics - Calculus - Rate Measure..

    A baseball diamond is a square whose sides are 60 ft long. a player running from first to second base has a speed of 25 ft per second. at what rate is the player's distance from home base changing when he is 10 ft from second base?

    Green's Theorem - Work

    A particle starts at the point (-2,0), moves along the x-axis to (2,0), and then along the semicircle y= squareroot(4 - x^2) to the starting point. Use Green's Theorem to find the work done on this particle by the force field F(x,y)= < x, x^3 + 3xy^2 >.

    Solving Polynomials by factorizing

    Factor 1. x^2 + 12x +36 - y^6 2.9y^2 + 12y + 4 - x^2 solve each equation n^2 + n = 72 (4x + 9)(x - 4)(x + 1) = 0 m^3 = m^2 + 12m (x + 4)(5x - 1 ) = 0 x^ + 6x - 7 = 0 A stereo system installer needs to run speaker wire along the two diagonals of a rectangular room whose dimensions are 40 feet by 75

    Minimum Length Problem

    A fence 3√3 meters high stands 1 meter away from a wall. What is the shortest ladder that can reach from the fence to the wall? Hint: draw a picture. Let (theta) be the angle the ladder makes with the ground. Part of the ladder goes from the ground to the top of the fence, and the other part goes from the top of the fence to t

    Mathematics - Calculus..

    A) Give a possible formula for a cubic function. Assume the graph crosses the x-axis at exactly -3, 1, and 4. Assume it crosses the y-axis at exactly -12. B) The desert temperature, H, oscillates daily between 42ºF at 4am and 82ºF at 4pm. Write a possible formula for H in terms of t, measured in hours from 4am. Give your

    Mathematics - Calculus - Integrals

    Please show detailed steps of how to evaluate the following integrals. Please use natural log. [See the question file for full description]

    Polynomial functions

    Your manager is very pleased with your presentations and being able to show your calculations in a detailed fashion. He has asked that you help him prepare for the upcoming company summit. Before you get together, he has asked that you give him a little review on polynomial functions and how you would apply them to everyday use.

    Graphing the Equation to Find the Lowest Unit Cost

    I found that the unit cost of using production equip. is: cost = 1.5x(2)[that is to the 2nd power] - 120x + 4,000 where x is the number of units produced. Draw a graph to find the lowest unit cost. what production level does this correspond to?

    Riemann sum and volume

    See attached file Write a Riemann sum and then a definite integral representing the volume of the region, using the slice shown. Evaluate the integral exactly.

    Calculus problem

    Please help me in attached problems. A customer ordered a quadratic metal sheet with side length x0=10cm. What is the maximal acceptable error of the side length if the area of the metal sheet should be?... For each of the following functions: state if the function is monotone Decide if it is injective, surjective or bij

    Basic

    Please help with the following problems. See attached. 1. First find a general solution of the differential equation: dy/dx = 3y Then find a particular solution that satisfies the initial condition that y(1) = 4. 2. Given a = <4, -3, -1> and b = <1, 4, 6>, find a x b 3. Use the method of Lagrange multipliers to find

    Mathematics - Calculus Rate Problem

    14. A spherical balloon is inflated so that its volume is increasing at the rate of 3 ft^3/min. How fast is the diameter of the balloon increasing when the radius is 1 ft? 16. A 17-ft ladder is leaning against a wall. If the bottom of the ladder is pulled along the ground away from the wall at a constant rate of 5 ft/s, how

    Leaky Oil Can - Rate Measure

    A leaky cylindrical oil can has a diameter of 4 inches and a height of 6 inches. The can is full of oil and is leaking at a rate of 2 in.^3/hr. The oil leaks into an empty conical cup with a diameter of 8 in. and a height of 8 in. A. At what rate is the depth of the oil in the conical cup rising when the oil in the cup is 3 in