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

03/26/21

#### Let F ( x ) = f ( x ^2 ( f ( x ) ) where f ( 2 ) = 4 , f ( 8 ) = 5 , f ′ ( 2 ) = − 2 , f ′ ( 16 ) = 6 . Find F ′ ( 2 ) .

i have no idea how to do this

#### 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

12/08/16

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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