Thursday
April 24, 2014

Posts by Daniel


Total # Posts: 800

calculuc
A rectangular box without a lid is to be made from 12 square meters cardboard. Find the maximum volume of such a box.

math
A rectangle is 3 times as long as it is wide, it's area is 108 square centimeters. What is the length? what is the width?

Physics
Find the speed at which Superman (mass=88.0 kg) must fly into a train (mass = 17998 kg) traveling at 60.0 km/hr to stop it. Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if...

algebra
multiply and simplify by factoring sqrt20a^11b*sqrt8a^12b^11

algebra
multiply and simplify by factoring sqrt20a^11b*sqrt8a^12b^11

algebra 1-B
solve (sqrt14-x)+8=(sqrt3-x)=11

physics
10

MGT330
General environment – how will the forces be changing over the next three years and how will these forces impact the industry (for example, demographics – aging population)?

chemistry
26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.

chemistry
26.5 moles of a .2 M aqueous solution of NaOH is required to titrate 50 ml of an aqueous solution of HNO3, what is the concentration of HNO3. I don't want the answer, I want to know how to do it.

Physics
Thanks drwls. I'm having trouble with part b though. What is R? For the appropriate mass, am I suppose to use the density times the thickness to get the mass of the sail and with that, add the mass from payload?

Physics
Some spacecraft design uses a solar sail made of aluminized plastic. As sunlight reflects off the sail, radiation pressure drives the spacecraft outward away from the sun. a. If the sail material has a density of 700.0 kg/m3, what is the maximum thickness of the sail for which...

optimization calculus
Let length be L and width of open end be W. Height is then 144/(LW) Area of netting required A = LW (top) + WH (end) + 2LH (sides) A = LW + 144/L + 288/W Differentiate to find dA/dL and dA/dW and equate both to zero. Solve these as a pair of simultaneous equations. You should ...

7th grade math
You need to show a Venn Diagram for this question

7th grade math
A group of 32 students went to the amusement park.All of them either rode the Ferris wheel or Roller coaster.Seventeen rode the Ferris wheel,23 rode the roller coaster,and 8 did both.How many rode only the Ferris wheel

lccc
An urn contains 4 red and 3 blue marbles. What is the probability when three marbles are selected randomly that all 3 will be red, if we select each marble a) with replacement b) without replacement

7th grade math
Each person has taken four tests and has one more test to take.Find the score that each person must make to change the mean or median as shown Barry has scores of 93,84,86,and75.He wants to raise the mean to 86

Math
24x - 10 = 18x - 4. Please I need operations for this equation

math
integration of cot^4(1-2x)dx

math (calculus)
i dont know what would be the answer

math (calculus)
what would be the answer?

math (calculus)
what would be the answer when you plug 5pi/4 into this equation 6sec^2x-7sinx for x? i cant get the answer need some help

MATH(CALCULUS)
f(x)=12x/(sinx+cosx) find f'(-pie) need some help!

last question!!need help!!
oh ok thanks for that

last question!!need help!!
ok and yes ive tried all thoses answers i put them in to see if its right and they are not i dont know why they are not right cause it has to be cause sinpie=0 and cospie=-1 so leaves with -12pie or -12 but somehow they arent the answer i quess i have to work more into it but ...

last question!!need help!!
can you help me!!

last question!!need help!!
this is the equation: f(x)=12x/(sinx+cosx) and i need to find: f'(-pie)

last question!!need help!!
yes i need to find the derivative of f'(-pie)

last question!!need help!!
f'(-pie) thats what i need to find

last question!!need help!!
im not saying it like that and i did the work but its not right answer the computer says when i put the answer in it says incorrect. this is what i did: 12(-pi)/(0+(-1)) = 12pi but its not right i dont know why?

last question!!need help!!
thats not the answer

last question!!need help!!
f(x)=12x/sinx+cosx find f'(-pie)

calculus
f(x)=12x/sinx+cosx find f'(-pie) anyone know the answer!!! need help!

math
f(x)=12x/sinx+cosx find f'(-pie) need help!! anyone know the answer!!

need some help!!!
im confused on this problem and i really need some help if you can help me and yes that is the problem i am trying to solve i would appreciate it

need some help!!!
sorry about that and i said yes that was the way but in the computer it doesnt have the parenthesis but yeah its the same way that the problem im trying to solve

need some help!!!
f(x)= 12x ________ sinx+cosx thats how the problem is and i need to find f'(-pie)

need some help!!!
f(x)=12x/sinx+cosx find f'(-pie) anybody know the answer!!!

calculus
ok how about this one: f(x)=12x/sinx+cosx find f'(-pie) this is what i did: 12(-pi)/(0+(-1)) = 12pi is that right what am i doing wrong and what would be the answer

calculus
m=pi and b= y-pi=pi(x+5pi) y-pi=pi(x)+5pi(pi) m=pie but what does b= though

calculus
-find the equation of the tangent line to the curve y=5xcosx at the point (pi,-5pi) -the equation of this tangent line can be written in the form y=mx+b where m= and b= -what is the answer to m and b?

calculus
yeah its 12x/(sinx+cosx) but in my problem there is no ( ) but yeah its the same thing but what would the equation be to plug in (-pie)

calculus
i have unlimited trys so it dont matter but 12pi not the answer either

calculus
the computer says its not the answer incorrect it says

calculus
f(x)=12x/sinx+cosx find f(-pie)

Calculus(derivatives)
the answer was 6sec^2x-7sinx but what would it be if you put in (5pi/4) how do u put sec^2 in the caculator

Calculus(derivatives)
f(x)=7cosx+6tanx, find f'(x)and f'(5pie/4)

math
use integration by parts to prove the following reduction formula: |cos^nx dx =1/n cos^(n-1)xsinx +(n-1)/n |cos(n-2)xdx

Pre algebra
3(n+1)/7is greater than or equal to n+4/5 how would you work this

global science
Where do the cold and hot winds come from in Hawaii, Honolulu

calculus
find the area of the region R that lies under y=√x (x+1), over 0≤x≤4

chemistry
23 stands for the GFM of sodium

geometry
What is the area of a equlateral triangle with the measurement of 6-inch side?

chemistry
Water has an equilibrium vapor pressure of 23.8 mm Hg at 25 C. If 1.00 g H2O is sealed in a 20 L flask, what mass will remain in the liquid phase when equilibrium is established? ( 760 mmHg = 1 atm, R =0.0821 L.atm/mol.K)

Mathematics
1.180,000 2.150,000 3.27

Mathematics
Suppose humans walk 10,000 steps a day on average. If your average step it about 18 inches, how many inches do you walk in a day? How many feet per day? How many miles a day?

chemistry
three student chemists measured 50.0 mL of 1.00 M NaOH in separate Styrofoam "coffee cup" calorimeters ( Part B). Brett added 50.0 mL of 1.10 M HCI to his solution of NaOH; Dale added 45.5 mL of 1.10 m HCL 9 eqaul moles) to his NaOH solution. Lyndsay added 50.0 mL of...

physics
A mass of 10kg is placed on the top of a plane inclined at 45 degrees to the horizontal and allowed to slide down. What is the acceleration of the mass if the frictional force opposing is 3.2N.

British Literature
What two literary devices are used in the novel sense and sensibility?

physics
M1*V1 + 0 = (m1+m2)V 1200V1+0=(1200+1000)45 1200V1 = 2200*45 1200V1 = 99000 V1 = 99000/1200 V1 = 82.5km/h

physics
its a science word to do with forces and its scrambled itsreniat

geometry
taibg tihygta tyq

7th math
At the mall, you spent a total of $170.86. You bought 2 pairs of jeans for $ 39.95 each,a jacket for $45.99, and shirts for 14.99each. How many shirts did you buy

math
thank you

math
-3.5- 4f=10-2.5f solve the equation

math
thank you

math
-z-(z-6)=8 solve the equation

georgia history
Sherman's Atlanta campaign battles what is the date of the battle where is the location ,why is particular battle significant in the civil war,

7th grade
what does b equal

7th grade
2(2.5b-9) + 6b= -7 what is b

7th grade math
Thank you

7th grade math
9.8c + 8d - 4.6c + 2.9d simpilfy the expression

Economics for Manager
Hello, Could someone please help me find the answer to this question: The two largest diner chains in Kansas compete for weekday breakfast consumers. The two chains, Golden Inn and Village Diner, each offer weekday breakfast customer a “breakfast club” membership tha...

Math
If two indistinguishable dice are rolled, what is the probability of the event {(2, 2), (3, 2), (1, 2)}?

college
If two indistinguishable dice are rolled, what is the probability of the event {(2, 2), (3, 2), (1, 2)}?

accounting
What benefits do you see for the U.S. economy in tax-sparing credits? Should it be expanded or reduced? Why or why not? The North American Free Trade Agreement (NAFTA) has tax consequences. Discuss the costs and benefits as you see them for the U.S. from NAFTA.

Operation management
1. Based on your reading and research explain whether or not you believe ERP and MRP are the only resource planning processes applicable to manufactured processes? 2. Can either ERP or MRP be used for service industries or can they only be used for manufacturing organizations?

math
5-2

math
change 4+4+3 into a multiplication sentence

social studies
what ar all the anwsers to florida studies weekly on week 13

Grammar
false

history
what is the purpose of the three-fifths compromise

Physics
An airplane flies due north at 160 km/h with respect to the air. There is a wind blowing at 80 km/h to the east relative to the ground. What is the plane's speed relative to the ground?

Algebra II
I need to rewrite this with rational exponents. (√3mn)^9 I have no clue of what I need to do. Can someone please take me step by step?

algbra
According to some students, what is the true purpose of homework

4th grade math
589

math
The slope of the equation would be -3 You can find the slope of an equation by using the equation, y=mx+b, m being the slope and b being your y-intercept. The slope of an equation is also the change in y over the change in x. So looking at that table you have there, from 11 to...

MATH HELP ME 1st
It would be negative 79 + 11

math
What is the order of 1.5 x 10^3, 1.4 x 10^-1, 2 x 10^3, and 1.4 x 1-^-2 from least to greatest?

math
(2/5n^9)^2

math
(2/hn^9)^2

math
thanks i got 3.7 x 10^6

math
Scientists believe that there is an extremly massive black hole at the center of the milly way. How many times more massive than the Sun would a black hole with a mass of 7.36 x 10^36 kg be? The mass of the sun is approximately 1.99 x 10^30 kg.

math
This is what it said in the book. use the formaula pie = 3.14 4pie r ^2

math
Suppose a white dwarf star has a diameter of approximately 1.6692x10^4 km. Us the formula 4pie^2 to find the approximate surface area of the star

math
what is the simplified form of the expression? (3c^2d^4)^3(2c^5d^8)^3

math
what is the simplified form of the expression? (3c^2d^4)^3(2c^5d^8)^3

math
what is the simplified form of the expression? (3c^2d^4)^3(2c^5d^8)^3

Algebra
What is the simplified form of the expression? (y^-5)-10 -5 and -10 are exponents

8th grade science
What experiments or activities are unacceptable to do with seeds

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