2,208 Answered Questions for the topic Pre Calculus

Pre Calculus

02/01/15

The concentration of a certain drug in a patients bloodstream t hours after the injection.
Equation: C(t)=(0.2t)/(t2+1) Evaluate lim C(t) t->∞ and interpret your results.
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Pre Calculus

01/28/15

Find the indicated limit, if it exists. lim x->-2 (4-x squared/2x squared+ x cubed).
Here is the equation again. ((4-x2)/(2x2+x3)) find the limit if it exists the number to plug into the equation is -2.
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01/22/15

How much force changes when Mass and V doubles and R triples?
F varies jointly as M and square of V and inversely as R. How much force changes when Mass and V doubles and R triples?     Can you explain varies jointly also please? 
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Pre Calculus

01/15/15

Sorry about that, Here's the correction. Big Thanks!
2sin4x - 3sin2x + 1 = cos2 x( 1- 2sin2x )
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Pre Calculus

01/13/15

a total of 150 tickets were sold nd a total of $290 were made if student tickets cost 1.50 and adult tickets cost 2.50 then how many adult tickets were sold
a total of 150 tickets were sold and a total of $290 was made if student tickets cost 1.50 and adult tickets cost 2.50 then how many adult tickets were sold
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Pre Calculus

01/12/15

This qustion is from a pre calculus class.
Can you help me with this problem:   Verify the identity: sinx/1+cosx  +1+cosx/sinx= 2cscx
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Pre Calculus

12/23/14

what is the vertex of this parabola?
y = -5(x + 4)^2 + 3
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Pre Calculus

12/19/14

How much is going to be paid into the fund?
A trust fund is being set up by a single payment so that at the end of 15 years there will be $75,000 in the fund. If the interest is at an annual rate of 4.03% compounded quarterly, how much money... more
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12/19/14

how do i graph tangent trig functions
My pre calculus teacher is making us use her way of tangent function graphing using    Undefined, (-1, 0, 1, Undefined so basically finding your maximas and minimas which is easy enough for... more
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Pre Calculus

12/14/14

Write the result in standard form (1+10i)^2
It is an operation from pre ap calculus
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Pre Calculus Math Algebra 2 Precalculus

12/13/14

If sin ? = -2/3, which of the following are possible?
18. If sin θ =4/5 and is in quadrant 2, the value of tan θ is _-4/3____. <---- my answer. is it correct?   3. If sin θ = -2/3, which of the following are possible? Check all that apply.cos θ =... more
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Pre Calculus Equations Natural Logs Logs

12/09/14

Natural Log Base Equation
7 e^x = -2 e^x + 5   Find x where e is the base of a natural log
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12/09/14

word problem
Nate wants to build a rectangular pen for his animals. One side of the pen will be against the barn; the other three sides will be enclosed with wire fencing. If Nate has 650 feet of fencing, what... more
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Pre Calculus

12/08/14

Suppose that to provide funds for higher education, the federal government adopts a new incoming tax plan that consists of the 2011 income tax plus an additiona
Let g be the function such tat g(x) is the 2011 federal income tax for a single person with taxable income x dollars, and let h be the corresponding function for the new income tax plan. Write a... more
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Pre Calculus

12/06/14

6x^5-x^4+7x^3+x-1
find the bound of the real zeros of the polynomial function
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Pre Calculus

11/27/14

2, -2-5i; degree 3
I need to know how to solve a polynomial f(x) with real coefficients and a leading coefficient 1 with the given zeros and degree. 
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Pre Calculus Domain Rational Functions

11/25/14

Finding domain of a rational function
Find the domain of this rational function:   r(x) = (1302x-871)(1175x+1324)/(867x+1076)(1465x-832)
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11/25/14

Polynomial Function
A polynomial function f(x) can be written as a product of two polynomials if f can be factored. Hence if f can be factored, then f(x) = q(x)g(x) where q and g are both polynomial functions. Write... more
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11/25/14

Finding a Formula
Find a formula for the exponential function of the form y = a b^x passing through the points (4,-25) and (8,-125). Find exact values for a and b.    
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Pre Calculus

11/21/14

A bus that costs $42,000 when new depreciates according to the exponential model, V=42000e^(-.3t) After how many years will the bus be worth 20,000
A bus that costs $42,000 when new depreciates according to the exponential model, V=42000e^(-.3t) After how many years will the bus be worth 20,000
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Pre Calculus

11/19/14

domain and range of g(x)=7(9^x)-3
Im Confused about this problem
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Pre Calculus

11/10/14

Pre Cal Math Help!!!
A woman invests a total of $20,000 in two accounts, one paying 4% and the other paying 6.5% simple interest per year. Her annual interest is $950. How much did she invest at each rate?
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Pre Calculus

11/10/14

Pre Cal Math Help!!!
A chemist has two large containers of sulfuric acid solution, with different concentrations of acid in each container. Blending 310 mL of the first solution and 590 mL of the second gives a mixture... more
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Pre Calculus

11/07/14

Complex zeros and factored form
x3-5x2+12x-8 find the complex zeros and write in factored form
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Pre Calculus

11/05/14

finding asymptotes and holes
find the asymptotes and holes of x2+x-12/x2-9 and describe the behavior of the graph around the vertical asymptotes. 
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