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Many home barbecues are fueled with propane gas (C3H8). How much carbon dioxide in kilograms is produced upon the complete combustion of 18.9 L of propane (approximate contents of one 5-gal tank)? Assume that the density of the liquid propane in the tank...

18 years ago

8 sin²(3x) cos²(3x) = 2 [2 sin(3x) cos(3x)]² = 2 [sin(6x)]² = 2[1 - cos(12x)]/2 = 1 - cos(12x)

16 years ago

tan(X+30)tan(30-x)=2cos2x-1 / (2cos2x+1) i just did (tanx)(-tanx)=-sin^2x/cos^2x would that work?

16 years ago

Consider 57.5 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 3.800. What volume of water must be added to make the pH = 6.000? i made a ka for both of them to find out HA and i got .025M for fhte first one and 1E-6M for the second on...

16 years ago

alan wants to raise his grade from an 83 to 90 approx what precentage increase would that be?

16 years ago

find: sin 23pi/12 i got totally the wrong answer how do i approach this?

16 years ago

what is a committee chair in congress?

16 years ago

okay so what does appropriated mean i googled it and i don't understand what tehy mean baby words please?

16 years ago

Cooper Inc's latest EPS was $4.oo, its book value per share was $20.00, it had 200,000 shares outstanding, and its debt ratio was 40%. How much debt was outstanding? a. $2,333,333 b. $2,666,667 c. $3,000,000 d. $3,333,333 e. $3,666,667

15 years ago

when 3 times a certain number is subtracted from 25,the difference is 28.what is the number?

15 years ago

solve for x: 3- 1/2(x+7)=18

15 years ago

View Vincent van Gogh’s The Starry Night on p. 61 and Sol LeWitt’s Wall Drawing No. 681 on p. 64 in Ch. 4 of A World of Art and describe both paintings in terms of their lines. What does each artist’s use of line communicate about the artist’s personality...

14 years ago

why do u divide by the original instead of 90?

16 years ago

haha i got that too! but the right answer is (-root(2-root(3)))/2

16 years ago

whats a committee for what?

16 years ago

OMG, sorry reiny, i didn't think anyone was going to help me out on this one so i reposted it (again with the wrong equation)... the correct one is.. -3x=4y=-6 5x-3z=-22 (3z instead of 3y) 3y+2z=-1

14 years ago

THANK YOU!!!!!! sorry! i feel like a waste of time for you, but im just not that smart ;)

14 years ago

Thank you very much Reiny, and Goodnight :) no more questions for now :)

14 years ago

How did you get that answer?

14 years ago