Question

Brain weight B as a function of body weight W in fish has been modeled by the power function B=.007W2/3, where B and W are measured in grams. A model for body weight as a function of body length L (measured in cm) is W=.12L2.53. If, over 10 million years, the average length of a certain species of fish evolved from 15cm to 20cm at a constant rate, how fast was the species' brain growing when the average length was 18cm? Round your answer to the nearest hundredth.

Answer 1

hey did you get all the other webwork questions?

Answer 2

some of them yes

Answer 3

which ones did you not get? i'll help you.

Answer 4

This question and the last one
Are we in the same course ?

Answer 5

yes

Answer 6

i have posted these two questions too. working on it

Answer 7

ok this is very hard for me, last time that I did geometry was 3 years ago and not that hard...

Answer 8

yeah! tell me about it.

Answer 9

Im from France, and if you choose economics way in the equivalent of grade 10 here you are not doing geometry anymore
anyway question 9 10 and 14 are hard for me....

Answer 10

Your name by the way ?

Answer 11

did you get 6 and 12? i didnt get them i got 9 i think

Answer 12

I did 6 but not 12

Answer 13

#9 = 3819718634

Answer 14

.3819718634

Answer 15

theres a decimal

Answer 16

do we have the same text ?
it s incorrect for me

Answer 17

Gravel is being dumped from a conveyor belt at a rate of 30 cubic feet per minute. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 10 feet high? Recall that the volume of a right circular cone with height h and radius of the base r is given by V=1/3πr^2h.

Answer 18

this is mine

Answer 19

I have 20 cubic feets and 22 feet high

Answer 20

damn

Answer 21

no worries...

Answer 22

Method ?

Answer 23

http://answers.yahoo.com/question/index?qid=20111013170057AAnKTnO

Answer 24

i used this

Answer 25

Thanks

Answer 26

what did you get for 6 and 12?

Answer 27

6) (sqrt(65))/8
12) didnt start to di it

Answer 28

GOT IT GOT GIT IT!!

Answer 29

#6 that is

Answer 30

cool :)

Answer 31

i wish it could be the same for me !!!

Answer 32

sorry

Answer 33

did you get 14?

Answer 34

nope working on it

Answer 35

me too. i think i almost have it. almost

Answer 36

me too

Answer 37

i got 12

Answer 38

dpes it work ?

Answer 39

#12 i mean

Answer 40

yes, for me it does

Answer 41

post your equation for # 12

Answer 42

let's see if it's the same

Answer 43

2x^2+1xp+50p^2=26000.

Answer 44

-205/11 try it

Answer 45

and let me know

Answer 46

you get it right well done
i was almost at the end of the computation

Answer 47

haha

Answer 48

number 7 ?

Answer 49

3.020134228 for me

Answer 50

whats you question? post it

Answer 51

number 5 (the origin of this conversation actually)

Answer 52

i didnt get #5

Answer 53

ok

Answer 54

did you get #13 second part or 14?

Answer 55

?

Answer 56

im working on it for 13
and i m asking a friend for 14

Answer 57

this can be useful for you maybe
http://answers.yahoo.com/question/index?qid=20111013170057AAnKTnO

Answer 58

i got 10.4 for the brain one but its wrong!

Answer 59

i got a lot of good answers
for which question do you want it ?

Answer 60

5?

Answer 61

13 part 2

Answer 62

0.007 .12^(2/3) 5.06/3 18^(2.06/3) 5/10000000 1000000000

Answer 63

13 is the only one that i didnt do
you have the first part ??? What is it ?

Answer 64

(2q-550/q)

Answer 65

did you get 14?

Answer 66

yep

Answer 67

but i do think that we dont have the same figures at the beginning :/

Answer 68

do you have a formula?

Answer 69

Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 5 cubic feet per minute. If the pool has radius 7 feet and height 9 feet, what is the rate of change of the height of the water in the pool when the depth of the water in the pool is 7 feet?

this id my question

Answer 70

Suppose that water is pouring into a swimming pool in the shape of a right circular cylinder at a constant rate of 5 cubic feet per minute. If the pool has radius 5 feet and height 12 feet, what is the rate of change of the height of the water in the pool when the depth of the water in the pool is 8 feet?

Answer 71

never mind i got 14 too

Answer 72

only 13 2nd part left then right?

Answer 73

my friend is on it he is going to tell me in a minute

Answer 74

awesome

Answer 75

you didn't tell your name

Answer 76

neel

Answer 77

yours?

Answer 78

stupid me. it must be kessandre!

Answer 79

nope alexandre :)

Answer 80

haha

Answer 81

who's your teacher

Answer 82

lindstrom

Answer 83

maths 104 105
I HAVE THE SOLUTIONS FOR 14

Answer 84

kessandre is only a nickname

Answer 85

its for 13sorry

Answer 86

WHAT IS IT!!

Answer 87

my text is Find dRdt when q=5 and dpdt=4.
dRdt=

Answer 88

sqrt1050 (-2sqrt1050/5)+20

Answer 89

q=20 and dpdt=3 for me.

Answer 90

the answer of my buddy was sqrt650 (-sqrt650/5)+20

Answer 91

dont know if this is the same for you :/

Answer 92

nope

Answer 93

...

Answer 94

I would not be able to explain I didnt understand everything :(

Answer 95

thats fine. we still did a lot together.

Answer 96

i'll work my way through it

Answer 97

thats right
i have everything right even for 5
do we have the same text ?

Answer 98

for 5 we have the same text. yes