2,195 Answered Questions for the topic Pre Calculus

Pre Calculus

03/12/15

the wheels of a car have a radius 11 in and are rotating at 1500 rpm. find the speed of the car in mi/h
please round answer to the nearest tenth. Use Pi=3.1416
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03/10/15

Exponential and logarithmic function
Logistic Growth unrestricted growth because of limited habitat and food sup- plies. Under such conditions the population follows a logistic growth model:p(t)=d/1+ke^-ctwhere c, d, and k are... more
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03/09/15

Exponential and logarithmic functions
Carbon Dating The age of an ancient artifact can be determined by the amount of radioactive carbon-14 remaining in it. If D0 is the original amount of carbon-14 and D is the amount remaining, then... more
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03/09/15

the neutral exponential function
Radioactive Decay A radioactive substance decays in such a way that the amount of mass remaining after t days is given by the function m(t)= 13e^-0.015t where m(t) is measured in kilograms. (a)... more
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Pre Calculus

03/09/15

please help me! finals tomorow :(
find the first five terms of {2n/3n+1} a1=-2 an+3an-1?
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Pre Calculus

03/09/15

IM Desperate please help finals tomorow!!! find the first term and common difference of an arithmetic sequence whose fourth term is 3 and 20th term is 35
find the first term and common difference of an arithmetic sequence whose 4th term is 3 and 20th term is 35  
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Pre Calculus

03/09/15

i need help pleaseeee!
given v=-2i+j and w=4i-3j find ||v-w|| please!
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Pre Calculus

03/06/15

Solve using logarithmic
given: populations of 2 towns Springfield: f(t)=200(2)^t/3shelbyville:g(t)=500(1/4)^t/5when will springfeikd and shelbyville have the same populatio? What is that populatio?  With explaintion and... more
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Pre Calculus

03/05/15

find the exact value of cos(75) + cos(15)
using sum and difference formulas for cos
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03/04/15

Solve each equation using the designated method
Solve 2x^2 + 8x -4 = 0 by completing the square.   Solve (x^2 +x)^2 -3(x^2+x) +2=0 using substitution, factoring, and the quadratic formula
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02/07/15

For each of the equations below, determine algebraically if the graph of that equation is symmetric with respect to x-axis, y-axis, and origin.
(a)  x2+1/x3 = y2   (b)  lxl x3 = ³√y
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02/02/15

Find Equation of line AB, is A(2,4) and B(1,3). Then find the equation of perpendicular to line segment AB
Find Equation of line AB, is A(2,4) and B(1,3). Then find the equation of perpendicular to line segment AB
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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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