04/15/21

show all steps and calculus justification

formative homework help!!The quantity of a substance can be modeled by the function k(t) that satisfies the differential equation dk/ dt =-1/90 (k-450). One point on this function is k(2) = 900.... more

04/13/21

Write the equation of a line that passes through the points (-8,-3) and is perpendicular to the x-axis

Write the equation of a line that passes through the points (-8,-3) and is perpendicular to the x-axis

04/13/21

If cos ⁡x=−1/2, and 90°<x<180°, find Sin X and Cot X

With work please I don’t get it T-T

04/06/21

Let𝑓(𝑥)= (x-5)/(3x+4)Find an equation for the tangent line to the graph of f at 𝑥=11

How do I solve this word problem?

A triangular base prism has a volume of 16.2 cubic centimeters. The base is an isosceles right triangle. The height of the prism is 10 centimeters. What is the approximate length of the hypotenuse... more

Need help with this related rate problem

Laura is hitting a golf ball at the driving range. Suppose that the altitude of the ball is given in feet by the equation y = 200t − 40t 2, where t is the time in seconds after she hits the ball.... more

12/13/16

Recommended that temperature stay below 135F. Temperature (T) Minutes after begin operation (x) modeled by T = -0.005x^2 + 0.45x + 125

Tell whether the temperature of the part will ever reach or exceed 135F. Use discriminant of a quadratic equation to decide. Part 2: If machine is in operation for 90 minutes before turning off,... more

12/13/16

∫ (2)/(1+x^2) dx

11/30/16

Starbucks wants to sell a 10 lb bag of coffee consisting of 3 flavors: vanilla, hazelnut, mocha. How many of each flavor are in the 10 lb bag if the bag sells f

Starbucks wants to sell a 10 lb bag of coffee consisting of 3 flavors: vanilla, hazelnut, mocha.The vanilla sells for $2 per lb; hazelnut for$2.50 per lb; mocha for 43 per lb. the bag will... more

11/29/16

Integration: I am a little confused on what the questions are asking me to do and I keep getting the wrong answers. Could you correct me please?

One of the questions I am struggling with is: Find the solution of the initial value problem.dy/dx = 9x^2 + 8x; y(2) = 13 I am a little confused on what it wants me to do. I tried to integrate it... more

11/16/16

word problem

A solution containing 25% alcohol is to be mixed with a solution containing 60% alcohol to make 200L of a solution containing 40% alcohol. I x is the amount of 25% solution needed and y is amount... more

10/27/16

A ball is hit straight up

A ball is hit straight up and reaches height of 295 feet. Neglecting air friction, what speed (mph) would the baseball attain if caught at same height it was hit.

10/27/16

Optimization problem using both cost and volume of a box.

We are studying optimization, and she gave no notes on the topic. I  know now, from online videos, that I have to put variables in terms of each other to find what is asked, but this problem I am... more

10/26/16

An atom with 6 protons and 8 neutrons is an?

An atoms with 6 protons and and 8 nuetrons is an??

10/26/16

Derivative

Solve for derivative and find inflection points of f(x)= x (x+3) ^(1/2)....Please go step by step of simplifying derivative because I struggle on that involving square roots.

10/26/16

Calculus Question- Find the open interval

Find the open interval(s) on which the function f(x) = cos^2(2x)  is increasing in the interval (0,2π). Round numerical values in your answer to three decimal places.

10/26/16

Implicit differentiation...finding equation of the tangent

x^2e^y+ye^x=4 (2,0)    I got y=-x+2 for the equation. Is this right ?

10/25/16

Calculating molarity

Calculate the molarity of the solution created when 50.0mL of 0.132M NaOH is mixed with 75.0ml of 0.120M NaOH( assuming that volumes are additive)

10/25/16

I need to know how to work this problem

A company wants to mix peanuts, which contain 25% protein, and cashews, which contain 10% protein, to make a trail mix. If you make a mixture of 10 pounds of peanuts and 60 pounds of cashews, how... more

10/24/16

Form a? third-degree polynomial function with real coefficients such that 5 plus i and 2 are zeros.

10/24/16

Construct a polynomial function with the stated properties. Reduce all fractions to lowest terms. Fourth-degree and a single zero of 3

Construct a polynomial function with the stated properties. Reduce all fractions to lowest terms.Fourth-degree and a single zero of 3

10/18/16

Calculus word problem

A farmer wants to enclose a 192 square foot rectangular area with a fence that cost $3 per foot, and subdivide it into two equal-area rectangular pens with fence that costs$2 per foot. If the... more

10/17/16

Shortest diagonal distance

We have an empty cardboard box of dimensions breadth = 3 m, length = 4 m, and height = 2 m. An ant and a fly are sitting at one of the 8 corners inside the box and wish to go get some food at the... more

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