Stephanie

which of the statements below (some of which are entirely false) provides a plausible explanation for the DECREASE in entropy upon dissolution of sodium hydroxide :

in solution:

A) the ions constrain molecules from free motion

B) the ions are more tighty bound to each other when dissolved

C) some Na+ and OH- ions exist as clumps of ions

D) The Na+ ion is reduced to Na(s) which has a lower S

Radioactive decay can be described by the following equation:

lnA = lnAo - kt

where Ao is the original amount of the substance, A is the amount of the substance remaining after time t , and k is a constant that is characteristic of the substance

For the radioactive isotope strontium-80, k is 4.08X10^-1 hours-1 ....(hours -1 means inverse im assuming?)

If the original amount of strontium-80 in a sample is 46.3 mg, how much time (in hours) is needed for the amount of strontium-80 that remains to fall to 18.8 mg?

Those who experience aggressive sexual fantasies

(do i need to add a comma between aggressive and sexual?)

He chose the city due to the high prevalence of youth subcultures found there

a)Find the solution of the differential equation dz/dt + e^(t+z)=0 that satisfies the condition z(8)=-8

Can someone please help I really dont understand :/ can you please include the steps too i will choose best answer so you can get 10 pts

Also:

b) find the solution of the differential equation xy'+y=y^2 that satisfies the initial condition y(4)=-1

thanks!

A) dx/dy = e^(5 x)/(3 y^2) and y(0)=3

y(x)=?

Can someone please help I really dont understand :/ can you please include the steps too i will choose best answer so you can get 10 pts

Also:

b) find the solution of the differential equation dx/dy = y^2+9 that satisfies the initial condition y(7)=0

y(x)=?

thanks !

The dehumanizing effect caused by one's family

(so i want to say that the character feels inhuman and his family is the cause for making him feel this way)

Cu(NH3)4^2+ (aq) + SO4^2-(aq) + H2O (l) ---ethanol-------> Cu(NH3)4SO4•H2O(s)

Give an example of two rates of change that are related to each other. Include in your example how they are related mathematically and numerically.

The position of a cat running from a dog down a dark alley is given by the values of the table.

t(seconds) 0 1 2 3 4 5

s(feet) 0 8 49 53 91 103

A. Find the average velocity of the cat (ft/sec) for the time period beginning when t=2 and lasting

3s:

2s:

1:

I cant figure this out but I figured out the part b:

B. Draw the graph of the function for yourself and estimate the instantaneous velocity of the cat (ft/sec) when t=2

this answer is 21.943

can someone help me figure out part a please

t(seconds) 0 1 2 3 4 5

s(meters) 0 8 49 53 91 103

I tried but my answer isn't making sense

please help

also, does: x/x+y = 1/1+y

x+y is the denominator and 1+y is the denominator as well....(just to clarify)

rational expression

does :

60/84+x = 60/84 + 60/x

TRUE OR FALSE

I searched it up but I'm so confused someone please explain it to me

A function is

1) A set of numbers

2) Two sets of numbers

3) Two sets of numbers in which each number in the first set is related to some number in the second set

4) A set of pairs of numbers

5) None of the above

In this sentence: 'mentally we're in perpetual locomotion'