1,063 Answered Questions for the topic Pre-Calculus

Pre Calculus

09/18/14

i need help solving this problem, also i need to see how the work is shown.
A box with a square base and no top is to be made from a square piece of carboard by cutting 6 in. squares from each corner and folding up the sides. The box is to hold 1944 in3. How big a piece of... more
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Pre Calculus

09/18/14

If f(x)=2(x)^2+5v(x+2) , complete the following statement. Round your answer to the nearest hundredths place.
If f(x)=2(x)^2+5√(x+2) , complete the following statement. Round your answer to the nearest hundredths place. f(0)= ________
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Pre Calculus

09/10/14

Determine the equation of g(x) that results from translating the function f(x) = x^2 +7 upwards 10 units.
Maybe I am not looking at this problem right but I cannot solve it. 
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Pre Calculus

09/09/14

f(x)= x-1, g(x)= x-3 find (f+g)(-1)
f(x) = x-1, g(x) = x-3 find (f+g)(-1)  
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Pre Calculus Functions And Change

09/08/14

a. Find a formula for the function; b. From the table, is the function linear, exponential, or neither? c. Is the function concave up, concave down, or neither?
Function Table: x      | 3   | 4   | 6   | 8 | F(x)  | 20 | 17 |  11 | 5 |
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09/08/14

A product costs $429 Today. Write an expression for the cost is t days if the price is reduced at the end of each day by: a. $6 a day b. 4.5% a day
Natural Logarithmic and Exponential Functions.
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Pre Calculus

09/08/14

Im trying to find the fall of an angle of elevation chane
Im trying to find the fall of an angle of elevation change from 70 degrees to 30 degrees. Trying to find the opposite side of the triangle. The adjacent side is 100 feet. 
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Pre Calculus

09/07/14

vector with a diagram
A lighthouse is at the position of 7i - 3j , relative to the wharf. A boat is travelling in the direction parallel to 3i - j from the wharf. IF all measurements are in km, find to the nearest... more
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Pre Calculus Algebra2

09/04/14

Solve the equation. Remember to check for extraneous solutions.
I don't understand how to solve this problem.     5. (4/3)=(x+2)/(3x)+(1)/(3x^2)
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Pre Calculus Math Functions Helpful

09/02/14

How to Solve Compositional functions (HELLPP)
For the Given Functions:   f(x)=x^4 + 5x g(t)= 7t^3   Find the composite functions:   f x g(t)= g x f(x)=  
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Pre Calculus

08/28/14

write the standard form equation of the conic section: eccenricity = 3/5; Foci: (6,1), (6,-11)
I have the answer, but I don't understand how to get it.  Could you please help?   Could you please explain how you got"so c=1+5=6.  I don't understand how you came up with this.  thanks
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Pre Calculus

08/19/14

How many adult tickets were sold? How many student tickets were sold?
The cost of an adult ticket is $4.00   The cost of a student ticket is $2.50   The total amount received from 600 tickets was $1830
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Pre Calculus

05/13/14

for which real numbers x will the cube of x be less than the square of x?
for which real numbers x will the cube of x be less than the square of x?
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Pre Calculus

05/05/14

Given the infinte series
.13+.0013+.000013+.....   A. find R B> Express the sum as a fraction
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Pre Calculus

05/05/14

Find q in and minutes: s =7.3r=5.8 (s =are length, r = radius)
Find q in and minutes: s =7.3r=5.8 (s =are length, r = radius)
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Pre Calculus Calculus Integration

04/30/14

A curve is such that dy/dx= 6/x^2 and (2,9) is a point on the curve. Find the equation of the curve.
The slope of the curve has to be found by the dy/dx= 6/x^2. It will most likely end up as a y-y1=m(x-x1) formula at the end. 
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04/30/14

China's population in 1980 was 983 million; in 1990, it was 1,154 million.
Develop the mathematical model that represents China's population. (Write your model in terms of t, where t is the number of years after 1980. Let p represent China's population in millions. Round... more
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Pre Calculus

04/27/14

Polynomial and Rational Functions
1) Is (6s^-2)(es^-3) a power function ? 2) Find     a) lim x^-4 x->infinity    b) lim 2x^-1 x-> -infinity 3) Find    a) lim (t^-3 +2) t->infinity    b) lim (5-7y^-2) t->... more
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Pre Calculus

04/14/14

Sums and Arithmetic Series Quick Questions
Jenny decides to raise money for her local charity by encouraging people to lay quarters on the floor of a classroom in the shape of an equilateral triangle. She puts one quarter in the first row,... more
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Pre Calculus

04/01/14

Pre-Calc Questions
Give a practical interpretation in words of the function1) k(g(t)), where L=k(H) is the length of a steel bar at temperature H and H=g(t) is temperature at time t2) t(f(H)), where t(v) is the time... more
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Pre Calculus

03/23/14

Help ? Logs
What is the inverse of y=(1/2)^x --------------------------------------- find the given logarithm w/out using log function on calculator 1)... more
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Pre Calculus

03/11/14

Help ? Porfavor ? Gracias :)
Re write the exponentian equatiin in equivalent logarithmic form 1) e2 =7.389 -------------------------------------- if possible write the expressions using sums and/or difference of logarithmic... more
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Pre Calculus

03/06/14

I neednhelp with this...
Find the half-lives of the substances 1) einsteinium-253, which decays at a rate of 3.406% per day ----------------------------------------------------------------------------- 2) You place $800... more
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Pre Calculus

03/06/14

Logs and natural logs question ...please ? thanks
Let u=log 2 and v=log3. evaluate the following expressions in terms of u and/or v. 1) log... more
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Pre Calculus

03/05/14

Could someone help me with these please ? I'm a little confused
Express the following in terms of x without logs. 1)ln e^2x 2)e^ln(3x+2) 3)ln(1/e^5x) 4)ln sqrt(e^x)
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