Wednesday
July 30, 2014

Posts by marcus


Total # Posts: 235

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 ...

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?

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

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

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

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?

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 t...

science
What is the acceleration of a 50kg person is pushed with a force of 4N

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?

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 les...

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 ...

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) ...

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 22.6...

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?

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)

math
is 0.14 equal to 0.104

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?

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.

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 situ...

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

math
yes 13,15,17,19 thanks :)

math
that would give me 16 but thats not an odd number

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.

math
thanks i really appreciate it

math
what do you mean there are 6 wheels left over?

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

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

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. Fi...

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 tha...

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=

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 represent...

algebra
42x^5 _____ 7x

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

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

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?

geometry
DEFG is an isosceles trapezoid. Find the measure of <E.

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

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

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

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.

science
cslculate the molarity of a solution of 10.0g MgCl2 in a 300.0ml of solution

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.

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 ?

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. ...

Math
1) 2 + (-3) = ? 2 - 3 = -1 2) (-7)(11) = ? - ( 7 * 11) - - (77) so (-7)(11) = -77

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

algebra
what does the formula D=(b-c) represent

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?

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?

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?

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

biology
who made the first dna model and when

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, t...

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) Th...

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

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

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?

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

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.

11th grade
stupid 10th grader

11th grade
9x^2=49 3x=7 x=7/3

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 act...

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

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 re...

9th grade math
help

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.

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

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

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

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

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

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

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...

grammar
How do I know what the simple subject of the sentence is and the complete subject?

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

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

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?

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, mas...

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.)

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

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?

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

math
61 99 160

math
71, 109, 180 is that right

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

Mathematics
the way u did

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

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

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

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

math
2^100+2^100 is the answer 4^200

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. Aft...

math problem
thank you

math problem
2nd 8000 1st 4000

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

math problem
2nd $1600 1st $800

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?

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?

latin
Odii servitutem? would that translate to hatred of slavery?

chemistry
the specific heat capacity of mercury is 0.033 cal/(g))degrees Celsius)How many grams of Hg could be raised to 50 degrees celsius from 27 degrees celsius with 381 joules?

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