Monday
September 1, 2014

Posts by Hannah


Total # Posts: 2,831

physics
Surprisingly, very few athletes can jump more than 2.6 ft (0.8 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.6 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.
September 30, 2010

physics
Consider a pair of forces, one having a magnitude of 48 N, and the other 43 N. What maximum net force is possible for these two forces?
September 30, 2010

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 ...
September 26, 2010

Math(Please help)
The first one x=2sqrt(6x-36)
September 20, 2010

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
September 20, 2010

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?
September 20, 2010

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!
September 20, 2010

SCIENCE!!
10m/s i believe and that is going up and down if you neglect air resistance
September 20, 2010

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
September 20, 2010

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?
September 19, 2010

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 ...
September 19, 2010

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 ...
September 19, 2010

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?
September 19, 2010

math(please help)
Find the real solutions of each equation. x=2 srqt 6x-36 I do not know where to start.
September 19, 2010

Math(Please check)
or A=pi r^2
September 19, 2010

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?
September 19, 2010

math
There are 18 students standing in a circle, evenly spaced and consecutively numbered. Which student is directly opposite student 1
September 19, 2010

chemistry
huh? what set up that u did? wait r u bobpursley?
September 15, 2010

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...
September 15, 2010

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
September 15, 2010

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?
September 15, 2010

chem.
thank you so much!!
September 15, 2010

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.
September 13, 2010

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.
September 13, 2010

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.
September 13, 2010

conversion
a)339 Cal to kilowatt-hours
September 11, 2010

6th grade science
you are right!<:
September 11, 2010

Geography
I'm confused. What's this article got to do with the question I posted. The website has to do with the rainforest
September 10, 2010

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. ...
September 10, 2010

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?
September 10, 2010

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 ...
September 9, 2010

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 ...
September 9, 2010

Please check answers)
SO for #2 the answer is a-a^2 or +a^2?
September 9, 2010

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 ...
September 9, 2010

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) ...
September 9, 2010

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.
September 8, 2010

Calculus
Thank you. Can you tell me how to actually work the problem, too? Thanks again!
September 7, 2010

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
September 7, 2010

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)?
September 7, 2010

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.
September 7, 2010

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)?
September 7, 2010

math
explain why 1,734 is greater than 175
September 7, 2010

Math
estimated population
September 7, 2010

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?
September 6, 2010

Math
is it like a picture and you use the protractor to find the measure?
September 6, 2010

chemistry
density = mass/volume
September 6, 2010

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 ...
September 6, 2010

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.
September 6, 2010

Math(Please check)
How did you get 3?
September 6, 2010

Math(Please check)
Sorry I forgot a question. 2) rationalize the denominator. 4/sqrt6 My answer is 4sqrt6/ 6 Am I correct?
September 6, 2010

Math(Please check answer)
Simplify each expression. 1)(sqrt7 + 5)(sqrt7 -6) My answer is sqrt 7 - 30 Am I correct?
September 6, 2010

Math(Please check answers)
Thank you!
September 5, 2010

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 ...
September 5, 2010

chem
and also. A car seat fades with extended exposure to sunlight. thats chemical not physical right?
September 4, 2010

chem
when Flour, water, sugar and other ingredients are combined and baked into a cakeis that a chemical change?
September 4, 2010

math
how do u do 18t +12r over 3?
September 1, 2010

3rd grade
898
August 30, 2010

Math
Thank you!!
August 29, 2010

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?
August 29, 2010

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?
August 29, 2010

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?
August 29, 2010

Math(Please check)
Nevermind i added wrong. I got it. Thanks!!
August 28, 2010

Math(Please check)
How do I get 350?
August 28, 2010

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?
August 28, 2010

chemistry
64
August 27, 2010

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?
August 27, 2010

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?
August 26, 2010

Math(Please help)
Simplify the expression: (x^9y^-4)^6 x^54/y^24 Is this correct?
August 26, 2010

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?
August 26, 2010

math
Simplify the expression: (x^9y^-4)^6 x^54/y^24 Is this correct?
August 26, 2010

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?
August 26, 2010

conversion problems
ok! i get it thanks:)
August 25, 2010

conversion problems
wait shouldn't it just be one number for the answer?
August 25, 2010

conversion problems
oh = 12600/4880 g/cm^3 so how did u get from that to = 315/122 g/cm^3 ?
August 25, 2010

conversion problems
so would it be 12600/4880? so. 2.582 i have no idea if i did that wrong.
August 25, 2010

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 ...
August 25, 2010

dif. bet. Mm and mm
oh haha thats y i was totally off thanks!
August 24, 2010

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)?
August 24, 2010

conversion problems
150. cm to millimeters i got it to 1500mm. but it said check the number of sig figs.
August 24, 2010

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
August 24, 2010

science
im pretty sure that equation is for Partial Pressure. Im not sure how to explain it though sorry :/
August 24, 2010

Chemisty (Sig Figs)
oh i understand thanks a bunch! youve helped me a lot!!
August 23, 2010

Chemisty (Sig Figs)
oh so i have to round. so id be 7.7e6?
August 23, 2010

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
August 23, 2010

Maath
first-distribute second-put like terms together third- get r on one side i didn't do the problem. but thats the steps
August 23, 2010

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?
August 23, 2010

Chemisty (Sig Figs)
79.7 + 890.43 - 23 = 9.5 e2 its wrong and I am suppose to correct it.
August 23, 2010

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 ...
August 23, 2010

French
oh ok, I got it busy schedule. right. Thanks:)
August 22, 2010

French
oh so emploi du temps is schedule... oh ok. so do you think le lycee would work?
August 22, 2010

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.
August 22, 2010

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!
August 22, 2010

Math
your welcome:)
August 22, 2010

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
August 22, 2010

French III
Also this... Je pense que Pierre va l'__________________ avec elle. Veuillez choisir une réponse. a. aller b. attendre c. amener d. prendre
August 22, 2010

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:)
August 22, 2010

math-please check
is the solution to 2x^2-4x+5... 1(+/-)((sqrt6)/2)i ??
August 22, 2010

PreCal
It's 3.1
August 15, 2010

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
August 9, 2010

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
August 6, 2010

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