# Posts by Daniel

Total # Posts: 1,096

**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...

*March 11, 2011*

**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 ...

*March 8, 2011*

**7th grade math**

You need to show a Venn Diagram for this question

*March 7, 2011*

**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

*March 7, 2011*

**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

*March 3, 2011*

**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

*March 2, 2011*

**Math**

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

*March 1, 2011*

**math**

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

*February 27, 2011*

**math (calculus)**

i don't know what would be the answer

*February 25, 2011*

**math (calculus)**

what would be the answer?

*February 25, 2011*

**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

*February 25, 2011*

**MATH(CALCULUS)**

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

*February 25, 2011*

**last question!!need help!!**

oh ok thanks for that

*February 24, 2011*

**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 don't 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...

*February 24, 2011*

**last question!!need help!!**

can you help me!!

*February 24, 2011*

**last question!!need help!!**

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

*February 24, 2011*

**last question!!need help!!**

yes i need to find the derivative of f'(-pie)

*February 24, 2011*

**last question!!need help!!**

f'(-pie) that's what i need to find

*February 24, 2011*

**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 don't know why?

*February 24, 2011*

**last question!!need help!!**

thats not the answer

*February 24, 2011*

**last question!!need help!!**

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

*February 24, 2011*

**calculus**

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

*February 24, 2011*

**math**

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

*February 24, 2011*

**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

*February 24, 2011*

**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

*February 24, 2011*

**need some help!!!**

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

*February 24, 2011*

**need some help!!!**

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

*February 24, 2011*

**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

*February 24, 2011*

**calculus**

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

*February 24, 2011*

**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?

*February 24, 2011*

**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)

*February 24, 2011*

**calculus**

i have unlimited trys so it don't matter but 12pi not the answer either

*February 24, 2011*

**calculus**

the computer says its not the answer incorrect it says

*February 24, 2011*

**calculus**

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

*February 24, 2011*

**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

*February 24, 2011*

**Calculus(derivatives)**

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

*February 24, 2011*

**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

*February 24, 2011*

**physics gr 12**

The reply by Damon is wrong.

*February 21, 2011*

**Pre algebra**

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

*February 16, 2011*

**global science**

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

*February 14, 2011*

**calculus**

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

*February 5, 2011*

**chemistry**

23 stands for the GFM of sodium

*February 3, 2011*

**geometry**

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

*February 1, 2011*

**English**

Not all the questions were the same, but most were. Got a 100%!!! Her answers for 4 and 7 are incorrect. The correct ones are 4) a 7) d

*January 28, 2011*

**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)

*January 22, 2011*

**Mathematics**

1.180,000 2.150,000 3.27

*January 18, 2011*

**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?

*January 18, 2011*

**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...

*January 17, 2011*

**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.

*January 16, 2011*

**British Literature**

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

*January 16, 2011*

**physics**

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

*January 12, 2011*

**physics**

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

*January 12, 2011*

**geometry**

taibg tihygta tyq

*January 5, 2011*

**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

*December 16, 2010*

**math**

thank you

*December 15, 2010*

**math**

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

*December 15, 2010*

**math**

thank you

*December 15, 2010*

**math**

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

*December 15, 2010*

**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,

*December 11, 2010*

**7th grade**

what does b equal

*December 8, 2010*

**7th grade**

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

*December 8, 2010*

**7th grade math**

Thank you

*December 7, 2010*

**7th grade math**

9.8c + 8d - 4.6c + 2.9d simpilfy the expression

*December 7, 2010*

**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 ...

*December 7, 2010*

**college**

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

*December 6, 2010*

**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.

*December 5, 2010*

**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?

*December 5, 2010*

**math**

5-2

*December 2, 2010*

**math**

change 4+4+3 into a multiplication sentence

*December 1, 2010*

**social studies**

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

*December 1, 2010*

**Grammar**

false

*December 1, 2010*

**history**

what is the purpose of the three-fifths compromise

*November 28, 2010*

**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?

*November 21, 2010*

**science**

throw the jet pack in the opposite direction of where the space station is. The equal opposing forces will mean that throwing the pack will actually propel you in the opposite direction that you threw it in, and since there is no friction in space, you won't stop until you...

*November 17, 2010*

**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?

*November 17, 2010*

**algbra**

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

*November 16, 2010*

**4th grade math**

589

*November 16, 2010*

**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...

*November 15, 2010*

**MATH HELP ME 1st**

It would be negative 79 + 11

*November 15, 2010*

**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?

*November 15, 2010*

**math**

(2/5n^9)^2

*November 15, 2010*

**math**

(2/hn^9)^2

*November 15, 2010*

**math**

thanks i got 3.7 x 10^6

*November 15, 2010*

**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.

*November 15, 2010*

**math**

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

*November 15, 2010*

**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

*November 15, 2010*

**math**

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

*November 15, 2010*

**math**

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

*November 15, 2010*

**math**

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

*November 15, 2010*

**Algebra**

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

*November 15, 2010*

**8th grade science**

What experiments or activities are unacceptable to do with seeds

*November 15, 2010*

**Environmental science**

Sorry this a question but it isn't the one I meant to say. a)What kind of seed do you think are most valuable in this situation?

*November 15, 2010*

**Environmental science**

If You need to feed a village of 100 people and you have only 10 seeds,what would you do

*November 15, 2010*

**Pre-Calc**

Thank you so much!

*November 14, 2010*

**Pre-Calc**

I have two questions how do you solve cos x=sqrt2-cosx on the interval of [0,2pi) and how do you verify sin^2(theta)/1-cos(theta)=1+cos(theta) without negating it to equal 1?

*November 14, 2010*

**Pre-Calculus**

I do but why did u use that one. Im trying to understand because i have a test tomorrow and i have to do well on it.

*November 14, 2010*

**english**

so for the answers i gave their all the cons for eating meat

*November 12, 2010*

**english**

well for pro so far i have less animals die, health improves, look better physically and emotionnally for cons...less protein ingested...

*November 12, 2010*

**english**

Can someone please give me ideas of 3 pros of eating meat and 3 cons of eating meat? Please and thank you

*November 12, 2010*

**Physics**

Thank you! Took me a little whilez to figure it out but I got it.

*November 11, 2010*