# Posts by Daniel

Total # Posts: 1,098

**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 don't 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 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...

**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) that's 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 don't 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 don't 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

**physics gr 12**

The reply by Damon is wrong.

**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?

**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

**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 ...

**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?

**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...

**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

**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?

**Environmental science**

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

**Pre-Calc**

Thank you so much!

**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?

**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.

**english**

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

**english**

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