# Search results

1. ### Average rate of change of a sphere

i got it its 256\pi Used the instantaneous formula thing, i.e. the long way of derivative
2. ### Average rate of change of a sphere

second part is: Find the rate of change of volume when the radius is 8cm... So that means the instantaneous rgight?

4. ### Average rate of change of a sphere

the Volume of a sphere is given by V(r) = \frac{4}{3}\pi(r)^3 Find the average rate of change of volume with respect to radius as the radius changes from 10 cm to 15 cm. Ok what I tried is: \lim_{r\rightarrow 15} \frac{V(r)-V(a)}{r-a} P(a,V(a))=(15,14 137)\\ Let\ r=10 \lim_{r\rightarrow 15}...
5. ### Limits of polynomial functinos

yes that is what i mean but somethign like f(x)=x+3 wouldn't work
6. ### Rate of movement of glacier

LMAO hallsofivy!!! Right now I'm laughing my ass off LMAO God damnit!! thanks....lol I GOT IT btw how do you put spaces in between tex stuff,,,....it says its \\ but it doesn't work...look at my tex
7. ### Rate of movement of glacier

d(t)=(0.01)t^2+0.5t, P(a,f(a))=(20,14)\\\lim_{h\rightarrow 0} \frac{(0.01(400-800h+h^2)+0.5(20+h)-14)}{h}\\ \lim_{h\rightarrow 0} \frac{(0.01h^2+8.5h)}{h}=8.5
8. ### Rate of movement of glacier

The movement of a certain glacier can be modelled by d(t)=0.01t^2+0.5t where d is the distance in metres that a stake on the glaciers has moved, relative to a fixed position, t days after measurements began. Find the rate at which the glacier is moving after 20 days. What is the question...
9. ### Limits of polynomial functinos

Invent a function and sketch its graph to satisfy each situation lim_x-0+ f(x)=3 and lim_x-0- f(x)=-2 I can't figure out an equation for that

11. ### Trouble with Tangent of a Line

omg I'm so smart because I got to that last step u said but didnt see that 1/10 +5 is 5.1....... but thats why i'm so stupid too i didnt see it
12. ### Trouble with Tangent of a Line

thats what i did one sec
13. ### Trouble with Tangent of a Line

ur not suggesting y-y1=m(x-x1) ??
14. ### Trouble with Tangent of a Line

answer is x+10y-51=0 but whres the 51 from
15. ### Trouble with Tangent of a Line

duh negative reciprocal
16. ### Trouble with Tangent of a Line

but I have the slope....
17. ### Trouble with Tangent of a Line

I tried many thigns with this one: Determine the equation of the line that is perpendicular to the tangent to y=5x^2 at (1,5) What I did was use the formula for instantaneous rate of change finding the equation of the secant. (5x^2-5)/(x-1) from there I found that the slope of the...

19. ### Inverse expressions

yea ok but wait how do u find the inverse of like y=(x)^(1/3) y=3(2)^x whats the formula is not in the book BTW i can't do those equations in latex...
20. ### Exponential Growth etc

i suck at this tex stuff i can't get the x^(1/3) and I wrote the y=3(2)^x first and it appeared second...wtf
21. ### Exponential Growth etc

yea ok but wait how do u find the inverse of like y=3(2)^x or y=(x)^{1/3} whats the formula is not in the book
22. ### Exponential Growth etc

yea i know that rule thanks guys
23. ### Exponential Growth etc

the question is how do I solve (1.024)^t=2.857 and find "t" without using logarithms
24. ### Solve for X

haha court <3
25. ### Solve for X

Nevermind I Got It!!! Thanks You...i"m A Genious!
26. ### Solve for X

god damnit got the wrong answer again... I thought u meant... loga+logb
27. ### Solve for X

if thats not the way then how? its because of that stupid 3 in front
28. ### Solve for X

the way i wrote it, I used the logarithm law...
29. ### Solve for X

yea so u gotta find x
30. ### Solve for X

Solve for X: 3(2)^x = 4(^x^+^1) I did: xlog3(2)=(x+1)log4 and got the wrong answer