# Posts by df

Total # Posts: 18

calculo
Let f(x) = 4x5/4 + 10x3/2 + 9x. Find the following. (a) f '(4)

precalculus
z1=[cos pi/4 +sin pi/4] z2= [cos 2pi+sin 2pi] z1= sqrt 5 solve. how do you do this? substitute z1 and do what?

Chemistry
an unknown salt is either NaCN,NaC2H3O2, NaF, NaCl, or NaOCl. when 0.100 molar of the salt is dissolved in 1.00 L of solution, the ph of the solution is 8.07. what is the identity of the salt? where do I start? How do I solve it, cuz im not gettign right answer.

precal
thanks

precal
identify all solutions in the interval [0,2pi]: cos (2x) csc^2x=2cos(2x) I have no clue how to solve.

physics
fg

math
A triangle has sides of lengths 9 cm, 40 cm, and 41 cm. Which statement is true about this triangle? Not a right triangle?

PRECALCULAS
sin ¥è = 1/2 ¥è=90 or pi/2 only positive on pi/2 ¥è=pi/2+2kpi

chemistry 1A
R(CO2H)2+2NaOH-->R(CO2Na)2+2H2O Mu(NaOH)=44,81*10^(-3)*0,0953=4,27*10^… mol Mu(acid)=4,27*10^(-3):2=0,002135 mol If R=aliphatic saturated rest and there are not other substituents in C-chain,then R=CxH2x and: 0,2178=0,002135(90+12x+2)=0,1964+0,025… x=(0,2178-0,...

Chemistry
ddv

Chemistry
deez nuts

Physics
sdgdga

Physics
(a) Assuming that only gravity is acting on it, how far does an electron have to be from a proton so that its acceleration is the same as that of a freely falling object at the earth's surface? (b) Suppose the earth were made only of protons but had the same size and mass ...

fd
if y=36 when x=9 find x when y=52

Muscular Energy
it's a part of your body that helps you move.

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