# algebra: logs

42,165 results

### Math

Logs are stacked up in apile as shown in the figure. The top row has 15 logs and the bottom row has 21 logs. How many logs are in the stack? a1= 1+14=15 an= 7+14=21 s1=(n/2)(a1+an) (n/2)(15+21) = 18 How do I figure out the n?

### Physics

Raft made of 2.2m long pine logs.Average diameter of logs 26cm.How many logs are needed to strap together to build raft to hold max 4 ?What percent of the logs is under water when you are on your raft in the water with your friend?

### Physics

Raft made of 2.2m long pine logs.Average diameter of logs 26cm.How many logs are needed to strap together to build raft to hold max 4 people? What percent of the logs is under water when you are on your raft in the water with your friend?

### algebra

200 logs are stacked so that 20 logs at bottom row 19 in the next ,18 in the next and so on.In how many rows can 200 logs be arranged and how many are there on the top row ?

### Physics

PART 1 Raft made of 2.2m long pine logs with Average diameter of logs 26cm.How many logs are needed to strap together to build raft to hold max 4 people? Density of log = 600 kg/m^3 Each people weights 512N PART 2 What percent of the logs is under water when you are on your ...

### math - natural logs

Find the EXACT solution to e^(1-x) = 4^x You must use logs, not just a calculator.

### Precalculus

.5=e^(-20t) I am assuming this involves logs but we did't really learn logs. Anyone care to walk me through with a calculator. Have the Ti-83

### math logs

solve 3^(2x+1) = 9^(2x-1) using base 3 logs

### Logs-Algebra

How do you graph the following logs? f(x)=log5 (x-2) f(x)=log5 x-2 f(x)= log5 x f(x)=log5 (x+2)

### Maths (Logs)

1.Write the following equation without logs log y = mx+ c This would be y = 10^(mx+c) right? 2. Explain why this fits the exponential model (in other words, it can be written in the form y = a x b^x where a and b are real numbers).

### Pre Cal (logs)

I need help with these logs 1: Log underscore4 16X 2: 2 Ln ( X(sqr. root)e 3:5^[2logUnderscore5(3x)] 4:log underscore2 ^[1280-logunderscore2 5) I don't understand how to do them thanks

### chem

"Yule logs are simulated wood logs make of compressed paper that burn with a red and green flame.How would you produce a similar yule log?"

### Algebra 2

logs?

### algebra: logs

Log3x=4

### algebra

solve e^x / 3 = 5^x using logs.

### LOGS (ALGEBRA)

FIND THE INVERSE: f(x) = 10^(5x+3) - 10 f^-1(x) =

### Algebra logs please help

Log3(x)=log9(6x)

### Algebra

express log (3x^5y^3/z^3) as the sum and difference of logs with no exponents.

### Physics

A raft is made of 14 logs lashed together. Each is 29.5 cm in diameter and has a length of 6.50 m. How many people (whole number) can the raft hold before they start getting their feet wet, assuming the average person has a mass of 75.0 kg? Do not neglect the weight of the ...

### math

Mr Logan can saw 8 logs in 3 hours. How many logs can Mr Logan saw in one hour?

### Quantative Method

Generate your Unit transportation costs (in excel) 1. Ship construction logs from 8 provinces in Canada to 50 states in the U.S. Minimize total shipping cost. 2. Set up the demand in each state of the U.S. 3. Set up availability of logs in the 8 provinces of Canada

### chemistry

help required in calculating the pH value of a .84 mols per litre solution of sulfuric acid. I understand that pH = -log 10 (2x 0.84), I am not very experienced with logs and need assistance as to which keys to press on the scientific calculator in relation to the logs. thank ...

### more pre cal logs

sorry I am so lost I missed the class that talked about logs since my sister was in the hospital giving birth to a still born baby.... now I am all lost... Expand the log Ln 3sqrootx^2y/x+3 (the 3 is part of the sqroot not infront like the 3rd power) I hope that makes since

### Physics

A raft is made of 15 logs lashed together. Each is 30.0 cm in diameter and has a length of 7.00 m. How many people (whole number) can the raft hold before they start getting their feet wet, assuming the average person has a mass of 66.0 kg? Do not neglect the weight of the ...

### algebra 2

find the points of intersection of the following algebraically y=2^x + 4^x y=2^x+1 - 4^x+1 I set them equal to each other but not sure if you use logs or what to solve it

### MATH 1111

College Algebra help with logarithms! Ln (x-4) - Ln (x+1) = 16 How do I take natural logs?? it's a study guide question for our final exams

### Statistic

At peak periods 15 of attempted logins to an email service fail. log-in attempts are independent and each has the name probability of failing. Ann logs in repeatedly until she succeeds A. Find the probability that Ann needs to log in atleast four times before she succeeds B. ...

### Algebra

Solve the equation. 2log3 y = log3 4+ log3 (y+8) Here's what ive got take out the logs and say y^2= 4+ y +8 which simplifies to (y^2)-y=12 how do i simplfy the y?

### Algebra (logs)

Please help, I need help on these two problems. Solve the equation. log3(x − 16) = log3(9x) e^1 + ln(7) It appears on the homework that the ln(7) is written like this ^ln(7) but I am still stuck on it. Thanks!

### College algebra

Use the properties of logs to write the expression as one log: 8log(base 5)4th square root of x minus 4log(base 5) x

### Science

Which of the following materials will burn the fastest in open air? A. a log, two feet in diameter B. two logs, each one foot in diameter C. a pile of small splinters made from a two-foot diameter log D. Both logs and the splinters will burn at the same rate.

### Science

Which of the following materials will burn the fastest in open air? A. a log, two feet in diameter B. two logs, each one foot in diameter C. a pile of small splinters made from a two-foot diameter log D. Both logs and the splinters will burn at the same rate.

### LOGARITHMS

HI THE QUESTION STATES THAT ONE SHOULD CALCULATE THE LOGS WITHOUT THE USE OF A CALCULATOR...OKAY MY PROBLEM IS THIS... 2 3 2log 8 + 2log 8 what should i do? i had come to the piont of... 4 5 log 8 + log 8 But what's to do now i don't know..Think u can help?... cheers michelle ...

### Algebra 2

Can someone please explain to me how to solve logarithmic equations? Some examples are: -5=log2X 3^5x+1= 40 and log6X+(log6)7=(log6)35 I hope that makes sense because logs are hard to type.

### exponential and logarithmic graphs question

hi, i desperately need help solving this question: Find the values of A and k if the general equation of the graph shown is y=Ae^kx where the graph goes through the points (-1,-4) and (-2,-10) do i solve it using simultaneous equations? because i have attempted this yet failed...

### Re: Algebra II

How to solve Log (9x+5) - Log ((x^2)-1) = 1/2 16 16 (The 16 is from the logarithmic function : b) (y=log x) b Could anyone post the answer to this? 16 is supposed to be next to Log(16) but lower. This is for both the Logs in the equation.

### Math

Could you check these pleas? Firewood usually sold by a measure known as a cord. A full cord may be a stack 8x4x4ft or a stack 8x8x2ft 10. what is the volume of a full cord? 8*4*4=(128ft) 11. A short cord or a face cord of wood is 8x4xThe lenght of the logs. What is the volume...

### algebra 2 logs and trig

log(base 2)cotx - 2log(base 4)csc2x = log(base 2)cosx the answer should be x = pi/3, 5pi/3 not sure how to work it out though, any help? I tried canceling the bases but that led to a dead end.

### math - logs

2 ln (x) = ln (20-x)

### Math logs

10^3x-8=2^5-x

### calculus

Differentiate y=lnx You ought to have this memorized. y'=1/x for y= ln x dy/dx = 1/x This is the most basic and fundamental of log derivatives. If you are studying Calculus, and the topic is logs, I fail to understand why you asked that question. IS there a website that can ...

### Science

3. Which of the following conditions would likely cause the activation energy to be high? A.atoms are close together B.the temperature is hot C.atoms are not close together * D.a catalyst is present 4. Which of the following materials will burn the fastest in open air? A.a log...

### math

solve with logs 3^(1-2x)=4^(x)

### natural logs

Solve for x: ln(x+1)+ 2 = x^2 – 8x + 12

### natural logs

solve for x. xe^x = 9

### logs

How do you solve: log (1/3) 1 ?

### Math - logs

the log(10^ -1)of 3.66 = of 9.86 = of -2.8 = thank you

### maths

solve for x 8=6^x using logs

### precal

logs 9^(2x-5)=27(x+4) and 3log(underscore4)(2x-1)=15 Thank you

### math

how do i solve these logs? log1/2 (3x+1)^1/3= -2 3^(x^3)= 9^x

### precalculus logs

what is the domain of f(x)=-ln(-x) and the inverse

### Math 12 (Logs)

Solve: 3^(2a+3)=7^(a-4) Please Help and Thank you

### logs

e^1−10x=9 solve for x

### Math (check please)

Could you check these please? Firewood is usually sold by a measure known as a cord. A full cord may be a stack 8x4x4ft or a stack 8x8x2ft 10. what is the volume of a full cord? 8*4*4=(128ft) 11. A short cord or a face cord of wood is 8x4xThe lenght of the logs. What is the ...

### math- logarithms

how do i solve these logs? log1/2 (3x+1)^1/3= -2 3^(x^3)= 9^x

### Precalc

if you have how do u do 2^2x - 2^x - 6 =0 (calc)how do u do it? using logs??

### Logs

log6(x+7)−log6x=2 Solve for x

### logs 3

How do you create a table to graph log (3/2) x ???

### calculus

Solve the equation 14=65(19)x for x using logs.

### math

How would I simplify this problem using logs? (25/16) -3/2

### math

how do you solve for x using logs: [(a + b)^x]/b^x I am not sure of the steps to get there.

### physics

You are planning to build a log cabin in northern Minnesota. You will pull the logs up a long, smooth hill to the building site by means of a rope attached to a winch. You need to buy a rope for this purpose, so you need to know how strong the rope must be. Stronger ropes cost...

### algebra

solve 4^3x-4=32^x+2 Please help! Do you mean 4^(3x) -4 = 32^x +2 ? yes If that is really what you mean, I cannot get a closed-form solution for you. You would have to solve it by trial-and-error or graphical means. If, on the other hand, you mean 4^(3x-4)=32^(x+2), then take ...

### math - logs

if logx3 = a and logx25 = b, determine an expression for logx(9/5).

### Logs

Solve for x. log5x=(1/2). Express the answer to the nearest hundredth.

### Langauge

Underline the complete compound predicate. Circle the verbs.. 1/ Millworkers peel logs or cut boards. Complete pradicate: peel logs or cut boards. Verb: peel 2/ truckers load the boards and deliver them. C.p: load the board and deliver them. V.: load 3/ merchants sell products...

### natural logs

solve for x. xe^x = 9 please help i am stuck. i keep going in circles.

### logs

log (base 8) 1 = ??? I know it's 8 to some power gives me 1, but I can't figure it out.

### math logs - please help

True or false: 2 ln x / ln 5 = ln x^2 - ln 5 for all positive values of x.

### math condense logs

write the expression as the logarithm of a single quantity 3[ln x-2 ln(x^2+1)]+2 ln 5

### math

5 divided by (3-e to the -x power)=4 5/(3- e^-x) = 4 5 = 12 - 4 e^-x 4 e^-x = 7 e^-x = 7/4 e^x = 4/7 Take natural logs of both sides, x = ln (4/7) = -0.5596

### Precalc (LOGS)

1. (e^x - 1 )/(x^2 - 1) < 0 2. The inverse of ln (3 - x) ? 3. Simplify x^3 - 3x^2 + 2 = 0 Any help would be GREATLY appreciated. Thank you so much for your time.

### math

also a problem that i cant figure out is how to do inverses of logs f(x)= 2log(base2)X

### Math (logs)

In x = -3 find x. I worked it out like this e^inx= e^-3 then I got x = 1/e^3. Is that correct?

### Math

1. Given the product law of logarithms, prove the product law of exponents. 2. Given the quotient law of logarithms, prove the quotient law of exponents. 3. Apply algebraic reasoning to show that a=b^(loga/logb) for any a,b>0 Please explain these to me. All I know is that ...

### algebra

logarithms Solve the following equations 3^x-2=6 Add 2 to both sides of the equation to start. Whatever operation you do to one side of an equation you must do to the other side as well. 3^x - 2 + 2 = 6 + 2 3^x = 8 Changing to logs: log 3^x = log 8 x log 3 = log 8 x = log 8 / ...

### Logarithms

How do I solve this using logs? I am having a total math meltdown tonight! 10=2^10/n Thanks again!

### Math

solve for x without using a calculator: log5(3^x) = log25(9^(1-2x)) I don't know how to get rid of the logs for this one. Help? Thank you!

### social studies

mahogany logs from central America sometimes wash up in scotland. how do you explain this?

### Alg 2

How do you simplify this expression? It gets confusing b/c of logs and exponents. Can someone help me explain how to do this. 8^log(8)x

### Algebra

Snookers Lumber can convert logs intoeither lumber or plywood. In a given day, the mill turns three times as many units of plywoos as lumber It makes a profit of $25 on a unit of lumber and $40 on a unit of plywood. How much of each unit must be produced and sold in order to ...

### PreCalculus

Assume that x y and a are positive numbers. Use the properties of logs to write the expression log a 9(squrt)xy.

### algebra

Snookers Lumber can convert logs into either lumber ofr lywood. In a given day, the mill turns out three times as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $40 on a unit of plywood. How many of each unit must be produced and sold in ...

### Algebra

Snooker's lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced and sold in order to ...

### Algebra 1

Snookers Lumber can convert logs into either lumber or plywood. In a given day, the mill turns out three times as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $45 on a unit of plywood. How many of each unit must be produced and sold inorder...

### misplaced nodifier

we finally found the fire extinguisher we had been hunting for behind a pile of logs

### math

How would you condense a logarithm expression into a single quantity if the logs have different bases?

### Precalc

I need help with logs. Thank you! Evaluate. 1. log base(3) 25 to the cubed root Condense. 2. 1/3logx + 2logy^3 -3log(z+1)

### Logs

Determine the domain of the following functions, write answer using interval notation. T(x)=log12(x^2+14x)

### Precalculus

This is for solving exponential/logarithmic functions: (This is a base e Logarithmic function I would assume): e^(4x)/10 =4^x-2 ? I understand the properties of logs for the most part, but I have a hard time figuring out the step-by-step process on how to solve exponential/log...

### Natural Logs

When you are subtracting functions with ln, I know you divide the numbers after ln, but what do you do with constants in front of ln? For example, I'm currently dealing with: 4ln8 - 4ln3 Thanks!

### trigonometry

(3^m)(5^(m+1))=12^(2m-1) not sure how to solve this but I think you use natural logs? I'm just stuck because the first two are multiplying and not adding and we didn't go over this

### language arts

Three Indian elephants patiently towed the logs that had just been cut. is this an adverb clause

### maths

Fuel wood logs sawed 53 times and 72 pieces made. If the cutter saw only one at a time how many there were before cutting?

### Logs

log (sqrt4(x^16 / y^4)) What is the value of the expression when logx=8 and logy=1? My work: x=10^8 y=10 I tried to plug these in but my calculator but it said "overflow." Is there an easier way to do this?

### Math logs

Solve the system of equations: y= (lnx)^2 + 2 (lnx^2) y = 3ln(1/x^2)+24 Im not sure what to do..

### Maths-Logs

when writing log b to base a, (log-a(subscript)-b), can a be less than 0?

### Calculus

Solve for x using logs. 4 * 16^x = 10 * 11^x Do you start by multiply 4 times 16 then 10 times 11, and then what? Or am I completely wrong?

### Logs

Solve the equation and check your solutions. Note any extraneous answers. log(3x-13)=2 - log x