2,195 Answered Questions for the topic Pre Calculus

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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Pre Calculus

11/03/14

for the given functions f and g, find the requested function and state its domain. f(x) = 4x-3; g(x) = 8x-9
i need some help please
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Pre Calculus

11/02/14

word problem
proof that for any real number k, (x-k) is not a factor of x^4+x^2+1
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Pre Calculus

10/31/14

Finding logarithms
log23+log2x=log25+log2(x-2)
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Pre Calculus

10/31/14

log(3x+5)=2
Solve the logarithmic equation for x.
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Pre Calculus

10/27/14

How many sacks of oats are needed to feed n horses?
If it takes m sacks of oats to feed h horses.   A. h/mn B. mn/h C. hn/m D. hm/n E. hmn
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Pre Calculus

10/12/14

If I have an 11 cup container and a 7 cup container with no marking and free water supply how do I get 2 cups in one container
How do I end up with 2 cups in one container without measurements
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Pre Calculus

10/09/14

-2 exponent
How do I solve an expression with a -2 exponent? Ex: (3y^-6x^2/4y^-7)^-2
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Pre Calculus

10/06/14

Find the number of cars that should use the car wash and the cost per hour for this number.
The cost per hour of running a car wash is C(x)=0.04x2 - 0.74x +5.75, where C(x) is the cost per hour in dollars and x is the number of cars passing through the car wash per hour. Determine the... more
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Pre Calculus

10/06/14

Find the maximum revenue.
The demand function for a new product is p(x)=-7x+65, where p is the prices in dollars and x is the number of items sold in thousands. The cost function is c(x)=9x+105. Determine the maximum revenue.
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Pre Calculus

10/06/14

If the population 10 years ago was 25,000, what is the population today?
The population of a alien city, found on the dark side of the moon has grown at a rate of 3.2% each year for the last 10 years. If the population 10 years ago was 25,000, what is the population today? more
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Pre Calculus Algebra 2

10/04/14

Find the amount of phosphorus-32 remaining after 84 days.
Phosphorus-32 is used to study  plants use of fertilizer \, It has a half-life of 14.3 days. write the exponential decay function of  a 50-mg sample. Find the amount of phosphorus-32 remaining... more
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Pre Calculus

10/04/14

Find the product of the complex number and its conjugate.
1. 2- 3i   2. -3 + 4i   3. -1 - √2i
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Pre Calculus

10/04/14

Use your rules to determine the number of bacteria after 2 hours.
The bacteria E. coli often causes illness amound people who eat the infected food. suppose a single E. coli bacterium in a batch of ground beef begins doubling every 10 minutes. Use your rules to... more
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