3,394 Answered Questions for the topic College Algebra

College Algebra

05/11/15

Use the formula

A=P(1+(r/n))nt   to find the total amount of money accumulated for an initial investment $1,150 at 12% compounded quarterly after 11 years.
College Algebra

05/11/15

The pH scale for acidity is defined by

pH=-log10(H+) where (H+) is the concentration of hydrogen ions measured in moles per liter (M). A substance has a hydrogen ion concentration of (H+)=4.6*10-5M Calculate the pH of the substance.
College Algebra

05/07/15

A chemist is studying the properties of a bronze alloy (mixture) of copper and tin.

She begins with 4 kg of an alloy that is one-half tin. Keeping the amount of copper constant, she adds small amounts of tin to the alloy. Letting x be the total amount of tin added,... more
College Algebra

05/07/15

Find the solution of the logarithmic equation

ln x=9 in terms of logarithms, or correct to four decimal places. Your answer is
College Algebra

05/06/15

f(x) = (x-5)(x+4)(x-3)

Find the y-intercept(s), the x-intercept(s), the values of x where f(x)>0, and the values of x where f(x)<0. What are the values of x where f(x)>0? Answer (in interval... more
College Algebra

05/06/15

Solve for x in each of the following.

If logx 128 =4/6, then x =
College Algebra

05/06/15

Use the Laws of logarithms to rewrite the expression

log2 (x19y8)   in a form with no logarithm of a product, quotient or power. After rewriting we have  log2(x19y8)=Alog2x+Blog2y   with the constant A=____ and the constant B=____
College Algebra

05/06/15

Starting with the graph of f(x) = 8^x, write the equation of the graph that results from

(a) shifting f(x) 2 units to the left. y = (c) reflecting f(x) about the x-axis and the y-axis. y =
College Algebra

05/06/15

Find the exponential function

f(x)=a^x whose graph goes through the point (2,25)   a=___
College Algebra

05/05/15

If you write the following expression

(x^-3 x^2/ x^3 x^-2)^2   as a single power of x then the exponent is___
College Algebra

05/05/15

If you write the following expression

(x^-3 x^2 / x^3 x^-2)  as a single power of x then the exponent is
College Algebra

05/05/15

Express the equation in exponential form (a) ln 2 = x is equivalent to e^A=B

A= B=2   2. ln x = 3 is equivalent to e^C=D   C=3 D=
College Algebra

05/05/15

Use the Laws of logarithms to rewrite the expression

log((x^3 y^8)/z^10) Alog(x)+Blog(y)+Clog(z)   A= B= C=
College Algebra

05/03/15

I bought 3 bacon and 4 eggs and paid 12.33 my wife went to the store and bought 3 eggs and 4bacon and paid 14.13

We want to return 3 packages bacon and 3 cartons of eggs how much will be refunded? also they were bought at the same store
College Algebra

04/30/15

the length of a rectangle is 5 less than twice the width. Given that the length is x and width is y and the perimeter is 20 cm, perform the following: a) Form a

form a system of equations using variables x and y form an augmented matrix of the system and solve the system find the area of the rectangle
College Algebra

04/28/15

let u=lna, v=lnb, w=lnc. for number 1 rewrite each without using the ln function

1.) ln(a2c4/b5)    

04/28/15

given that log11=1.0414 and log5=.6990, evaluate

1.) log55   2.) log125/121

04/28/15

solve the logarithmic equation

1.) log3(x-3)=1+log3(x+1)   2.)lne3x-27=log1  

04/28/15

solve the exponential equation

1.) 52x-3=7x+9   2.) 2e2x-11ex+5  

04/28/15

evaluate the logarithm to 2 decimal places

log2913

04/28/15

evaluate the logarithm to 2 decimal places

log2.97.5

04/28/15

solve the exponential equation

(1/4)-2x=64

newton's law of cooling states the temperature of a body at a time t after being introduced into an environment

Newton's law of cooling states the temperature of a body at a time t after being introduced into an environment having constant temperature To is A(t)=To+Ce-kt, where C and K are constants and t is... more

04/28/15

carbon 14 is used for carbon dating.

Carbon 14 is used for carbon dating. Carbon 14 decays at a rate of y=Yoe-(ln2)(1/5700)t. If a mummy is found and has exactly 1/3 of its carbon 14 remaining, how long has the mummy been entombed.

In an effor to control vegetation overgrowth, 82 rabbits are released in an isolated area Free of predators. After 2 years, it is estimated that the rabbit popu

In an effor to control vegetation overgrowth, 82 rabbits are released in an isolated area Free of predators. After 2 years, it is estimated that the rabbit population has increased to 328. Assuming... more

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