Wednesday
November 26, 2014

Posts by marcus


Total # Posts: 233

precalculus
When asked to sketch the graph of g(x)= -e^(x+1) +1, how do I turn this equation into exponential form? Or can I? I always get confused on what to do especially when I need to the x part of the equation out of the exponent.
November 21, 2012

precalculus
My book tells me to solve each exponential equation. I am given a lot of problems such as 6^x+1 = 4^2x-1 where I use In in the problem to help get my answer. However, in the same section, the book starts giving me problems such as 3(2)^x-2 +1=100 and .05(1.15)^x =5 etc. Where ...
November 21, 2012

precalculus
e^3x-7 x e^-2x =4e First step I get e^1x-7 =4e For the example in my book, the next step they divided by e. But I have no idea how to do this, or what involves?
November 21, 2012

precalculus
log_6(2x + 4)=2? 5 In x=10? log(x+25)=1+ log(2x-7)?
November 21, 2012

precalculus
No reason, basically the equation is supposed to read 3^log base 3^8?
November 21, 2012

precalculus
x= 3^log_3_^8 ? The log being in the exponent is throwing me off.
November 21, 2012

Precalculus
Solve (log x)^2 = log x Also, when will their be a possibility that an equation will have an extraneous solution? Like if you got two solutions for a log equation, will a negative solution for x automatically be extraneous?
November 20, 2012

Pre calculus
Okay, I'm really fuzzy about my log and exponential chapter. For example, solving some exponential equation such as e^3x-7 x e^-2x=4e I assume I start this equation by taking the natural log of both sides, but how will I know just by looking at an equation weather I need ...
November 20, 2012

science
What is the acceleration of a 50kg person is pushed with a force of 4N
November 15, 2012

chemistry
when Na compounds are heated, thy give off a light of 5890 A. If 1 x 10-4 mole of Na atoms each give off a photon of this wavelength, how many kilojoules of energy are given off?
November 14, 2012

chemistry
consider the following changes at constant temperature & pressure H2O(s) --yields-- H20(l); Delta H1 H2O(l) --yields-- H2O(g); Delta H2 H2O(g) --yields-- H2O(s); Delta H3 Using Hess's law, the sum of the deltas is a. equal to 0 b. sometimes greater than zero, sometimes ...
November 14, 2012

chemistry
since q= 100 mL x 4.18 x 8.01 =3348.18/.06= 55803. J to kJ= 55.803 should be the final answer, right? Because the answer key on my quiz says it's -55.8 kJ. I'm so confused because I thought for sure it would positive, especially since in the equation it says increases ...
November 14, 2012

chemistry
When 50.0mL of 1.20 M of HCl (aq)is combined with 50.0mL of 1.30 M of NaOH (aq) in a coffee-cup calorimeter, the temperature of the solution increases by 8.01 Degrees C. What is the change in enthalpy for this balanced reaction? HCl(aq) + NaOH(aq) --yields-- NaCl(aq) + H20(l) ...
November 14, 2012

chemistry
A 94.7 g sample of silver (s= 0.237 J/(g x Degree C)), initially at 348.25 Degrees C , is added to an insulated vessel containing 143.6 g of water (s=4.18 J/(g x Degree C)), initially at 13.97 Degrees C. At equilibrium, the finial temperature of the metal-water mixture is 22....
November 14, 2012

chemistry
I get -3113 as my answer when I plug in 30.6 as the molar mass when the teacher said it should be around -225 as the final answer?
November 14, 2012

chemistry
At constant pressure and 25 degrees C, what is delta H for the reaction 2C2H6(g) + 7O2(g) --yields-- 4CO2(g) + H2O(l) if the complete consumption of 11.3 g of C2H6 releases -586.3 kJ of heat energy? (11.3=.38 mol C2H6)
November 14, 2012

math
is 0.14 equal to 0.104
October 30, 2012

Art
If a painter paints 8 different pictures to get a better perspective and then only selects 1 picture to illustrate her mood: what would this be called?
October 9, 2012

Math
A basket containing 80 eggs weighs 2kg 300g. The same basket containing 60 eggs weighs 1kg 700g. Find the mass of the empty basket.
July 28, 2012

healthcare management
Write a 1,400- to 1,750-word paper on essential communication in a community crisis situation described in the scenario. Include the following in your paper: • The individuals or groups that will be communicating inside and outside the organization during this crisis ...
July 26, 2012

math
Fill in the blanks with the numbers that complete the sequence, and briefly explain the rule you used 2,3,5,5,8,7,11 _,_,_,17,_,_,_ 3,4,3,4,5,3,4,5,_,_,_,_,_,7 1,2,1,1,2,3,2,1,1,2,3,4,3,_,_,1,2,_,_,_,_,_,2
June 2, 2012

math
yes 13,15,17,19 thanks :)
June 2, 2012

math
that would give me 16 but thats not an odd number
June 2, 2012

math
Use algebra pieces and mental arithmetic to determine four consecutive odd numbers who sum is 64. Sketch and label your algebra piece model and explain how you solved the problem.
June 2, 2012

math
thanks i really appreciate it
June 1, 2012

math
what do you mean there are 6 wheels left over?
June 1, 2012

math
Levinson’s Hardware has a number of bikes and tricycles for sale. There are 27 seats and 60 wheels all told. Determine how many bikes and tricycles there are in the store
June 1, 2012

Math
gerald had a gross pay last wk of $980.00, If his total deductions were 161.35, what was his net pay?
May 27, 2012

consumer math
2. Use the monthly payment table and this table to answer the following questions. Loan APR Years Monthly Payment Total Payment Interest $6,700 13.5% 5 A B C $8,720 12.5% 15 D E F $20,230 11.5% 20 G H I Find A. (Points : 1) 3. Find B. (Points : 1) 4. Find C. (Points : 1) 5. ...
February 28, 2012

calculus
Actually, it's not homework. It's a practice problem that I don't even get credit for. I've done the problem multiple times but didn't think I should type up all my work for the wrong answers that I keep getting. I don't know who the other person is ...
February 2, 2012

calculus
If f(x)=x2+10, find and simplify the following: (a) f(t+8)= (b) f(t5+8)= (c) f(5)= (d) 5f(t)= (e) (f(t))2+8=
February 2, 2012

Algebra
The linear equation y=0.15x+0.79 represents an estimate of the average cost of gas for year x starting in 1997. the year 1997 would be represented by x=1, for example, as it is the first year in the study. similarly, 2005 would be year 9, or x=9 A) what year would be ...
January 6, 2012

algebra
42x^5 _____ 7x
December 10, 2011

MATH HOMEWORK HELP PLEASE ANSWER
Erica invests $10,000 at 5% interest compounded annually. How much interest will Erica earn in 3 years
November 3, 2011

pre algebra with pizzazz 239
why didn't the circus managers want their human cannonball to quit?
October 27, 2011

statistics
Facebook reports that the average number of Facebook friends worldwide is 175.5 with a standard deviation of 90.57. If you were to take a sample of 25 students, what is the probability that the mean number Facebook friends in the sample will be 190 friends or more?
October 26, 2011

geometry
DEFG is an isosceles trapezoid. Find the measure of <E.
October 20, 2011

science
You have 10 ml of a 1:10,000 solution of hydrogen peroxide (H2O2). What is the molar concentration of the solution?
September 5, 2011

compostion and communiucation II
DO YOU THINK BLOGGING AND INCREASED EXPOSURE TO INFORMAL WRITING HAS AN AFFFECT ON STUDENTS ACADEMIC WRITING QUALITY.
August 16, 2011

Geometry
If AB=5x+2 and AC=12x-2, what is BC?
June 30, 2011

Maths C
lol! i have the same assignment and im having trouble aswell. I cant find anything on weddles rule on the internet and it is not in my textbook.
June 23, 2011

science
cslculate the molarity of a solution of 10.0g MgCl2 in a 300.0ml of solution
June 21, 2011

geometry
How many hours will it take a bicyclist traveling 17.6 feet per second to finish a 90-mile race? Round your answer, if necessary, to the nearest tenth.
June 7, 2011

geometry
XY bisects and is perpendicular to line segments AB and CD . AB = 96 inches, and line segment AP = 52 inches. What is the length of XY ?
May 24, 2011

algebra
Actually is does make sense. drwls misinterpreted the question. It's asking for a decrease of 400% over 10 year and NOT a percent decrease. This means, that for year 1, the cost of a cell phone drop by 40%. At year 2 it dropped by another 40%, and on and on until year 10. ...
May 15, 2011

Math
1) 2 + (-3) = ? 2 - 3 = -1 2) (-7)(11) = ? - ( 7 * 11) - - (77) so (-7)(11) = -77
May 13, 2011

Math
Owes is negative/ gives is positive -455 + 86 = - 369 -369 -107 = - 476 - 476 + 348 = -128 So, after all that, he owes the company $128
May 13, 2011

algebra
what does the formula D=(b-c) represent
May 7, 2011

pre algebra
An area has been reforested. After 5 years , one of the tree is 2 meters tall. After six more years, the same tree is 3.2 meters tall. name 2 ordered pairs that can be used to to graph the information?
May 4, 2011

math
Max has the following colors of shirts: red, blud, green, yelllow, white, and orange. in how many different ways can he arrange the shirts in his closet?
April 12, 2011

math
On the fastest speedways, some drivers reach average speeds of 2 miles per minute. write the formula that gives the number of miles M that such driver would travel in x minutes. How would this driver travel in 38 minutes?
April 11, 2011

science
How many gallons of fossil fuel to make a gallon of each of the following? synfuel soy ethanol cellulosic electricity
April 10, 2011

biology
who made the first dna model and when
February 17, 2011

Chemistry
2. the pressure rises until a liquid-gas equilibrium is reached. A real life example of this is fire extinguishers which store CO2 as a liquid at room temperature at really high pressures. Im just a student, but I think that as the dry ice sublimes into gas at low pressures, ...
January 31, 2011

Chemistry
An ideal monatomic gas initially at 298 K and 1 atm pressure is expanded from a volume of 1 liter to 2 liters. Consider separately isobaric, isothermal and adiabatic expansions to accomplish this. In each case, calculate the following: a) The final temperature of the gas b) ...
January 30, 2011

algebra 1
Natalie made a mistake in the following problem. What line was the mistake made in? Show your work and give the correct answer. Line 1 6(4) ÷ 2 − 1 + 5 Line 2 6(4) ÷ 1 + 5 Line 3 24 ÷ 1 + 5 Line 4 24 + 5 Line 5 29
December 22, 2010

Geometry
Given triangleABC is congruent to triangleXYZ, if AB=3X-1, BC=5X+2, XY=7, and YZ=14, find X.
December 13, 2010

5th grade
Ginny has a pumpkin with a mass of 4.8kilograms. If .9 of its mass is water, how much of its mass is water? How much is not water?
December 6, 2010

wordd
Compare and contrast your abilities as an academic writer now as opposed to when you began your studies at college using four comparatives and four superlatives within your responses, explain what has led to these changes
November 19, 2010

advanced math 6th grade
how many positive integral factors does the number 36 have? I dont understand what that means or how to find the answer.
November 17, 2010

11th grade
stupid 10th grader
November 16, 2010

11th grade
9x^2=49 3x=7 x=7/3
November 16, 2010

Physics
A 67.0 kg base runner begins his slide into second base when moving at a speed of 3.5 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. How much mechanical energy is lost due to friction ...
November 14, 2010

english
what type of verb tense is this? After reading about the successful steps to planning I am going to create a budget?
November 10, 2010

College Chemistry
please help! You are given an unknown, colorless, solution that may contain only one salt from the following set: NaA, NaB, NaC. In solution each salt dissociates completely into the Na+ ion and the anion A-, B-, or C-, whose properties are A is green, B is yellow, and C is ...
November 10, 2010

9th grade math
help
October 26, 2010

Physics
You drive due east at 78 km/h for 55 min. Then you follow a road going 60 degrees south of east, going 99 km/h for another 38 min . Find your total displacement.
October 5, 2010

math
Write a real world problem that you can solve by writing an equation . The answer to the problem must be 6
September 20, 2010

statistics
the amount of time spent in North American adults watching television per day is normal distributed with a mean of 6 hours and a standard deviation of 1.5 hours
September 6, 2010

Zoology
Can you rank these from the smallest to the largest? Heart carbon atom sodium atom electron nucleotide tundra mitochondria glucose molecule fungal cell hydrogen atom
August 29, 2010

Algebra
Determine whether the graphs of the equations are parallel lines, perpendicular lines, or neither. 12x + 4y = 16 5y - 22 = -15x
May 7, 2010

Chemistry
Ethanol is a fuel that can be made from corn. How many kJ of heat energy are released when 3.00 kg of ethanol are burned? C2H5OH(l) + 3O2(g) ¨ 2CO2(g) + 3H2O(g) H = -1406.8 kJ/mol
April 17, 2010

calculus
Use an appropriate local linear approximation to estimate the value of Cotangent 46 degrees.
April 14, 2010

computer science
write a program that asks the user to enter today's sales rounded to the nearest $100 for each of three stores. the program should then display a bar graph comparing each store's sales. create each bar in the graph by displaying a row of astericks. each asterick should...
April 5, 2010

grammar
How do I know what the simple subject of the sentence is and the complete subject?
March 25, 2010

social studies
what effect did california's rapid population growth have on californios and native americans
March 8, 2010

7th grade
how did some people hope to solve the problem of california's isolation from the rest of the country
March 8, 2010

College Physics
A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 6.4 s later. If the speed of sound is 340 m/s, how high is the cliff?
February 2, 2010

science
What type of object will teh Sun leave behind once it finished dying? I know the answer is white dwarf, but what will its mass be like? big or small? What types of objects will high-mass stars leave behind once they finish dying? I want to say neutron stars, but what size, ...
November 29, 2009

Math
How would proportions be used to "scale up" or "scale down" something? (Not really sure if I even understand what this means. I even read my text and I can't figure this out.)
November 15, 2009

economics
if utility=a-b where a and b are 2 goods what does this tell you about the two goods?
October 27, 2009

economics
a new iphone is released which has 32gb memory as opposed to the old one which had 16gb. If the price of both models are the same what would happen to the market of the old model? What would happen if the new one was more expensive?
October 27, 2009

math
consider the set of Northwestern states or provinces (montana, washington, Idaho, Oregon, Alaska, British Columbia, Alberta) if a person choose one element, show that in three yes or no questions we can determine the element
October 23, 2009

math
61 99 160
August 23, 2009

math
71, 109, 180 is that right
August 23, 2009

math
List terms that complete a possible pattern in each of the following. 7,8,15,23,38 ____, ____, _____ I can not figure this out.
August 23, 2009

Mathematics
the way u did
August 22, 2009

Mathematics
I need to solve this problem in two diferent ways showing work. I have one way but I don't know what the other way could be the problem is 3 3/4 +5 1/3
August 22, 2009

Math-factoring
I need to know how to do this. In steps 9x^2-3x 4x^2-9
August 18, 2009

math
If the argment is correct supply the missing reasons. what is the reason? I don't know.
August 17, 2009

math
I don't know what to do. Hosni fave the following argument that -(a+b)= -a+-b, for all intergers a and b. If the arqument is correct, suppy the missing reasons. If it is in correct explain why not. -(a+b)=(-1)(a+b) =(-1)a+(-1)b =-a+-b
August 17, 2009

math
2^100+2^100 is the answer 4^200
August 16, 2009

math
Wally kept track of last week’s money transactions. His salary was $150 plus $54 in overtime and $260 in tips. His transportation expenses were $22, his food expenses were $60, his laundry costs were $15, his entertainment expenditures were $58, and his rent was $185. ...
August 16, 2009

math problem
thank you
August 8, 2009

math problem
2nd 8000 1st 4000
August 8, 2009

math problem
2nd 16,000 1st 8,000
August 8, 2009

math problem
2nd $1600 1st $800
August 8, 2009

math problem
In a television game show, there are five questions to answer. Each questin is worth twie as much as the previous question. If the last question was worth $64000, what was the first question worth?
August 8, 2009

Math 156
In which situations is it appropriate to display data using circle graphs? When is it inappropriate to use the data displays in circle graphs?
July 14, 2009

latin
Odii servitutem? would that translate to hatred of slavery?
May 13, 2009

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