Thursday
July 31, 2014

Posts by Hannah


Total # Posts: 2,828

Pre-Calc
A rectangular package to be sent by a delivery service can have a maximum combined length and girth (perimeter of a cross section) of 120 inches. a. Show that the volume of the package is V(x)= 4xsquared(30-x) b. Use your graphing calculator to find the dimensions of the packa...

Math(Please help)
The first one x=2sqrt(6x-36)

Math(Please help)
I know I posted this yesterday but I really do not understand this and I did not quite understand the comment on what to do. Find the real solutions of the equation. x = 2 sqrt6x-36

Math(Please check)
Find the real solutions by factoring. 7x^3 = 2x^2 x^2(x+7) = x(x+2) x=0 x=-7 x=-2 Is this correct?

Math(Please help)
Find the real solutions of each equation. 1) 1 / (x+6)^2 = 1 / (x+6) + 12 2) 8x^2/3 - 39x^1/3 - 5 = 0 I have no idea how to do these. Please help!!! Thank you!

SCIENCE!!
10m/s i believe and that is going up and down if you neglect air resistance

Math
I know I posted this yesterday but I really do not understand this and I did not quite understand the comment on what to do. Find the real solutions of the equation. x = 2 sqrt6x-36

Math(Please help)
Would x be $4,583.33? From the equation x(o.17) + (70,000-x)(0.07) = 6,000 I got 0.17x + 4,900 -0.07x = 6,000 and then I subtracted 4,900 from 6,000 and I added 0.07 to 0.17 and got 0.24x. Is this correct?

Math(Please help)
Betsy, a recent retiree, requires $6,000 per year in extra income. She has $70,000 to invest and can invest in B-rated bonds paying 17% per year or in a CD paying 7% per year. How much money should be invested in each to realize exactly $6,000 in interest per year? I do not kn...

math(Please help)
Betsy, a recent retiree, requires $6,000 per year in extra income. She has $70,000 to invest and can invest in B-rated bonds paying 17% per year or in a CD paying 7% per year. How much money should be invested in each to realize exactly $6,000 in interest per year? I do not kn...

math(Please check)
Find the real solutions of the equation: 14x^2 - 5x^2 - 1 = 0 I know that you have to use au^2 + bu +c = 0 so u^2 - 5x -1 which is prime. So would the answer be that the solution is the empty set?

math(please help)
Find the real solutions of each equation. x=2 srqt 6x-36 I do not know where to start.

Math(Please check)
or A=pi r^2

Math(Please check)
Translate the following sentence into a mathematical equation: "The area, A, of a circle is the product of the number pi and the square of the radius, r." A=pi X r^2 Is this correct?

math
There are 18 students standing in a circle, evenly spaced and consecutively numbered. Which student is directly opposite student 1

chemistry
huh? what set up that u did? wait r u bobpursley?

chemistry
thanks. what about: block of aluminum with a volume of 98.2 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5 °C, what is its final temperature? (density of aluminum = 2.70 g/cm3) I know i have to change the volume to grams. but i dont know how to lay out the...

chemistry
A 43 kg sample of water absorbs 343 kJ of heat. If the water was initially at 22.1°C, what is its final temperature? I got 1.9 but i think i didn't do it correctly

chem.
oh, would it be 24 (two sig figs) cause in the problem 43 has the least number of sig figs(2) or do we go by this equation: 343,000 = 43,000 x 4.184 x (Tf-22.1) = 0 and use 3 sig figs?

chem.
thank you so much!!

Physics
when i solve for t I get an extremely small number like .1998. I don't think I am setting up the problem right or something.

Physics
At t = 0, a stone is dropped from a cliff above a lake; 2.0 seconds later another stone is thrown downward from the same point with an initial speed of 33 m/s. Both stones hit the water at the same instant. Find the height of the cliff.

college: psychology
3. Define proactive & retroactive inhibition. Create a memory strategy to help you remember & discriminate between them. Explain this strategy well enough so that a reader could learn to use it.

conversion
a)339 Cal to kilowatt-hours

6th grade science
you are right!<:

Geography
I'm confused. What's this article got to do with the question I posted. The website has to do with the rainforest

Geography
This is my last question that I'm struggling with. We had to do 25 of them and this one I can't figure. Thank you for your help. It's greatly appreciated. Have a great weekend!!! More water flows through the Amazon Basin than through any other river system. Histori...

Geography
Due to the violent & complex origins of the Andies, many rich & precious metals and minerals were found in the Andies. The inital economic wealth of many Adean coutries came from mining gold, silver, tin, copper, and iron. How can this cause conflict with other nations?

Math(Please help)
1) An expression that occurs in calculus in given. Reduce the expression to lowest terms. (2x + 5) 4x - 2x^2(2) / (2x+5)^2 I have no idea what to do for this. 2) Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are po...

Math(Please help)
1) An expression that occurs in calculus in given. Reduce the expression to lowest terms. (2x + 5) 4x - 2x^2(2) / (2x+5)^2 I have no idea what to do for this. 2) Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are po...

Please check answers)
SO for #2 the answer is a-a^2 or +a^2?

Please check answers)
Perform the indicated operations and simplify the result. Leave your answer in factored form. 1) x/16 - 1/x all over 1 + 4/x A) x+4/16 B) x-4/16 C) 16/x+4 D) 16/x-4 E) -16/x+4 I chose answer C. I saw this as x^2-16/ x+4. Multiply the following using the FOIL method. Express yo...

Math(Please check answers)
Factor completely. If the polynomial cannot be factored say it is prime. 1) 15x^3 + 19x^2 + 6x A) (3x^2 +2)(5x+3) B) x(3x+2)(5x+3) C) x^2(3x+2)(5x+3) D) x(5x+2)(3x+3) E) Prime I chose E) Prime. 2) 2x^2 - 14x - 6x + 42 A) 2(x+7)(x+3) B) (x+7)(2x-6) C) 2(x-7)(x-3) D) (x-7)(x-3) ...

English
How would you write this as a topic sentence so it sounds like a theme for a book. The author is great at making someone who has a handicap or disability not feel so abnormal but a benefit to society.

Calculus
Thank you. Can you tell me how to actually work the problem, too? Thanks again!

Calculus
Determine whether the curve has a tangent at the indicated point. f(x)= sin x 0<x<3pi/4 cos x 3pi/4<x<2pi at x = 3pi/4

Math
Simplify expression. Answers should only have positive exponents. Assume all variables are positive. (4x^2 y^-1/3)^3/14 so would it be x^2(3/14) and y^-1/3(3/14)?

English
What does this mean? Gray Fire learns a lesson in excessive pride as a child when he believes that he can outrun the night and later must sacrifice his own toes to save his life, which then renders his gift of speed useless.

Math
Simplify expression. Answers should only have positive exponents. Assume all variables are positive. (4x^2 y^-1/3)^3/14 so would it be x^2(3/14) and y^-1/3(3/14)?

math
explain why 1,734 is greater than 175

Math
estimated population

Math(Please help)
Simplify each expression. Assume all variables are positive. 1) 3 sqrt2 - 8 sqrt128 I think you subtract the 3 from the 8 but I do not know what else to do. 2) Simplify expression. Answer should have only positive exponents. (8x^3 y^-1/2)^2/15 Do I multiply the exponents?

Math
is it like a picture and you use the protractor to find the measure?

chemistry
density = mass/volume

Math
Directions: Use each statement as givena and draw a single conclusion using all of the statements. 1) No birds,except ostriches, are nine feet high.There are no birds in this aviary that belong to anyone but me. No ostrich lives on mince pie. I have no birds less than nine fee...

Math
Simplify each expression (-216)^1/3 My answer is 1/6. Am I correct. (x^4y)^1/3 (xy^4)^2/3 I do not know how to simplify this.

Math(Please check)
How did you get 3?

Math(Please check)
Sorry I forgot a question. 2) rationalize the denominator. 4/sqrt6 My answer is 4sqrt6/ 6 Am I correct?

Math(Please check answer)
Simplify each expression. 1)(sqrt7 + 5)(sqrt7 -6) My answer is sqrt 7 - 30 Am I correct?

Math(Please check answers)
Thank you!

Math(Please check answers)
1) Solve the equation: 15(7x-6) = 3x-5 My answer is (-85/108) 2) Mary and her brother collect coins. Mary has 4 times the number of coins that her brother has. Together they have 175 coins. How many does Mary have? My answer is 140 3) Perform the indicated operations. Express ...

chem
and also. A car seat fades with extended exposure to sunlight. thats chemical not physical right?

chem
when Flour, water, sugar and other ingredients are combined and baked into a cakeis that a chemical change?

math
how do u do 18t +12r over 3?

3rd grade
898

Math
Thank you!!

Math
Simplify each expression: 1) (x+8)^2 = x^2 + 64 2) (x-2)^3 = x^3 - 8 So for (x+8)^2 i would use a^2 + 2ab + b^2 and a would be 8 but what is b? Would it be 64?

Math(please check)
so for (x+8)^2 i would use a^2 + 2ab + b^2 and a would be 8 but what is b? Would it be 64?

Math(please check)
Simplify each expression: 1) (x+8)^2 = x^2 + 64 2) (x-2)^3 = x^3 - 8 3) (x-2y)(x+y) = x^2 - xy -2y^2 4) (x+2)(x^2+3x-2) = x^3 + 5x^2 + 4x-4 Are my answers correct?

Math(Please check)
Nevermind i added wrong. I got it. Thanks!!

Math(Please check)
How do I get 350?

Math(Please check)
Divide 5x^4 - 3x^2 + 8x + 6 by x^2 + 8 My answer was 5x^2 - 43 with a remainder of 8x - 338. Is this correct?

Math(Please check)
State whether the expression is a polynomial. If it is, state the degree. a) 3x^2 - 7x + 2 = yes;3 b) 3x - 2/x = No c) sqrt2x^2 - 3pi = yes;2 sqrt2x + 5x = yes;1 Am I correct?

Math
Simplify the equation: 8^-3 X 8 I know that 8^-3 is 1/512 so do I now multiply the 8 to the 1 and 512?

Math(Please help)
Simplify the expression: (x^9y^-4)^6 x^54/y^24 Is this correct?

Math(Please help)
Simplify the equation: 8^-3 X 8 I know that 8^-3 is 1/512 so do I now multiply the 8 to the 1 and 512?

math
Simplify the expression: (x^9y^-4)^6 x^54/y^24 Is this correct?

math
Simplify the equation: 8^-3 X 8 I know that 8^-3 is 1/512 so do I now multiply the 8 to the 1 and 512?

conversion problems
ok! i get it thanks:)

conversion problems
wait shouldn't it just be one number for the answer?

conversion problems
oh = 12600/4880 g/cm^3 so how did u get from that to = 315/122 g/cm^3 ?

conversion problems
so would it be 12600/4880? so. 2.582 i have no idea if i did that wrong.

conversion problems
Im not sure how to convert these because of the cm cubed heres the question: An aluminum engine block has a volume of 4.88 L and a mass of 12.60 kg. What is the density of the aluminum in grams per cubic centimeter? so its gonna be something g/cm3 can you tell me what it is an...

dif. bet. Mm and mm
oh haha thats y i was totally off thanks!

dif. bet. Mm and mm
I was just working on a problem and i seem to keep getting it wrong. I think i might be converting wrong. all im wondering is.. is Mm the same as mm(millimeters)?

conversion problems
150. cm to millimeters i got it to 1500mm. but it said check the number of sig figs.

com 285
do you just need to know some info about it. heres a site that i find helpful htt*p://owl.*english.purdue.ed*u/owl/resource/6*36/01/ (take out the *'s

science
im pretty sure that equation is for Partial Pressure. Im not sure how to explain it though sorry :/

Chemisty (Sig Figs)
oh i understand thanks a bunch! youve helped me a lot!!

Chemisty (Sig Figs)
oh so i have to round. so id be 7.7e6?

Chemisty (Sig Figs)
this is my last question for the whole assigment and im soo glad!!! (9465 + 45 - 9.9) 8.1 X 10^6 i got 76950.e6 it said it was half right and said check your number of sig figs

Maath
first-distribute second-put like terms together third- get r on one side i didn't do the problem. but thats the steps

Math
A woman sells 18 containers of milk a day. Each container holds 22 quarts and a quart of milk weighs 1 1/2 pounds. If each of the cows give 25 pounds of milk a day, then at least how many cows must she have?

Chemisty (Sig Figs)
79.7 + 890.43 - 23 = 9.5 e2 its wrong and I am suppose to correct it.

Chemisty (Sig Figs)
Each of the following numbers was supposed to be rounded to two significant figures. For each one below, decide whether it was correctly rounded or not, and for those that were incorrectly rounded, correct them. (a) 3.149 e3 to 3.2 e3 Its incorrect but I dont know the correct ...

French
oh ok, I got it busy schedule. right. Thanks:)

French
oh so emploi du temps is schedule... oh ok. so do you think le lycee would work?

French
ok, so is emploi like a schedule or I thought it was a job?? Yah I have to use voacbs words from the chapter which focus on school and likes and dislikes.

French
Marianne a peur de son emploi du temps ________________ et elle va parler avec son ____________ d'éducation pour abandonner un cours difficile. Whats the first one? I need help!

Math
your welcome:)

Math
y=mx+b(Slope-intercept) Slope= 4-0/0-(-3) Slope= 4/3 then put a point in the formula. 4=0x4/3+b so b=4 final equation: y=4/3x+4

French III
Also this... Je pense que Pierre va l'__________________ avec elle. Veuillez choisir une réponse. a. aller b. attendre c. amener d. prendre

French III
Marianne a peur de son emploi du temps ________________ et elle va parler avec son ____________ d'éducation pour abandonner un cours difficile. I know the second one but need help on the first. Thanks:)

math-please check
is the solution to 2x^2-4x+5... 1(+/-)((sqrt6)/2)i ??

PreCal
It's 3.1

9th grade
Identify the type of subordinate clause in the following sentence. The guy who ran out of the clinic is running late. noun adjective adverb

english
They left the oven on; consequently, the roast was burnt beyond recognition. which is it of these? conjunctive adverb coordinating conjunction correlative conjunction subordinating conjunction

HIS/135 Reagan's Economics
I was hoping for some feedback before I turn in this short essay. Assignment: Compare and Contrast the "culture of consumption "during the Eisenhower administration with the "Decade of greed" during the Reagan presidency in 175-225 words. Reagan’s Econ...

Writing
Thank you! That was perfect!!

Writing
For school I have to write a formal business letter. I just can't think of a way to START the letter off. I have to write to Seteven Spielberg convincing him to make a movie out of the book Andromeda Strain. (Even thhough it already is a movie.) But I don't know how to...

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