# Posts by df

Total # Posts: 18

**help plzz asap**

dfs

**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

**Accounting 9**

52

**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.