Mathematics - 8 June 2007

Problem 8. A rectangular box with an open top is to have a volume of 10 cubic meters. The length of the base is twice its width. Material for the base costs $3 per square meter and for the sides costs $5 per square meter. (a) (15 points) Find the dimensions that minimize the cost of the box. (b) (5 points) How much does the cheapest box cost? (5 points) Which method described in the lecture are you using (endpoint method or first derivative test) and why?

2007-06-08 15:45:06 · 3 answers · asked by funkmistress_flex 1

(b) f'(x): f(x) = 5/ cube root x^7
(c) dx/dy where y=x^2- 1/x^2

2007-06-08 15:43:03 · 2 answers · asked by funkmistress_flex 1

2007-06-08 15:10:14 · 15 answers · asked by Anonymous

2007-06-08 15:00:56 · 5 answers · asked by jordyn s 1

Example: A 5 and a 2 on the dice equal a total of 7.

2007-06-08 14:55:03 · 8 answers · asked by doogsdc 2

2007-06-08 14:46:58 · 13 answers · asked by Anonymous

I'd like to figure out how to do that, not just the answers. Please.

2007-06-08 14:43:38 · 12 answers · asked by perilleak 1

2007-06-08 14:33:51 · 7 answers · asked by fmlp 1

a. a^2-4a+3
b. a^2+2a-15
c. a^2+8a+3
d. a^2-4a+6

2007-06-08 14:33:40 · 5 answers · asked by lana l 1

2007-06-08 14:06:43 · 5 answers · asked by joefarmer 1

Please hurry this is urgent...

a) 1 2 3 4 5 6 7 8 = 2003
Use the symbols + - x and / once each to make the statement true


b) 7/A = B*C / (D*E) + F*G / (5*H)
Use the digits 0 through 9 once each (5 and 7 already used) to replace the letters and make the statement true

2007-06-08 13:47:09 · 3 answers · asked by Rokko211 2

My answer is 84%. Am I right?

2007-06-08 13:41:33 · 11 answers · asked by doogsdc 2

2007-06-08 13:39:47 · 8 answers · asked by Bert S 2

Please help..I am totally confused!! (Rational Expressions)

Refer to the triangle in the figure. Find an expression that represents its perimeter

3/4x + 1/x^2 + 5/x^2

2007-06-08 13:12:34 · 3 answers · asked by Anonymous

Pick a number............ any number.........
Ok mulitply it by two

Then
Add ten

Then
Divide by two

Finally
Subtract the number you started with

ANSWER: Five (5)

2007-06-08 13:09:23 · 5 answers · asked by Nicole 2

2007-06-08 13:05:20 · 5 answers · asked by boswelltrinity 1

2007-06-08 13:03:57 · 4 answers · asked by Anonymous

possible answers
a. -2/3
b. -3/2
c. 4
d. 6

2007-06-08 13:02:34 · 5 answers · asked by boswelltrinity 1

{1,1} to Q{5,7}
possible answers are the following:
a. 4
b. 6
c. 8
d. 10

2007-06-08 13:01:19 · 2 answers · asked by boswelltrinity 1

Joyce sold 60% of her stamps. Alan bought 40% of the stamps that Joyce sold. After the sale, Joyce had 240 stamps more than Alan. How many stamps have Joyce at first?

2007-06-08 13:00:37 · 7 answers · asked by evabree 1

possible answers are:
a. -2
b. 4
c. 5
d. 10

2007-06-08 12:56:54 · 3 answers · asked by Anonymous

possible answers:
a. 3/sqrt2i-7/sqrt2j
b. 3sqrt2i-7sqrt2j
c. 3i-14j
d. 6i-14j

2007-06-08 12:56:02 · 3 answers · asked by Anonymous

I am looking to find the equation of the line and think I have it but want to double check.

2007-06-08 12:51:49 · 4 answers · asked by casper5 3

2007-06-08 12:18:29 · 11 answers · asked by Anonymous

This is part of a Trigonometry question, but I can't figure out the main question without getting this first portion which is finding the x and y values of the slope. Any help would be greatly appreciated!

2007-06-08 12:03:10 · 5 answers · asked by realpoeticyouth 1

The roots of the quadratic equation 16x^2+7x+4=0 are
α² and β².
Find
(i) a quadratic equation whose roots are 1/α² and 1/β².
(ii) two distinct quadratic equations whose roots are α and β.

workings needed thanks

2007-06-08 12:00:51 · 3 answers · asked by Stormy Knight 1

continuously is given by A=Pe^rt where r is expressed as a decimal. Solve this formula for t in terms of A,P, and r.

2007-06-08 12:00:11 · 2 answers · asked by toepic24 1

2007-06-08 11:56:36 · 4 answers · asked by toepic24 1

integral ln edx = ?
a)1/e+c
b) 1/x+c
c) x+c
d)e^x+c

2007-06-08 11:47:13 · 6 answers · asked by Anonymous

ok, so if you have the equation 3x^2-5x, then what is the equation of the tangent line at x=1

Thanks in Advance.

2007-06-08 11:43:51 · 7 answers · asked by Carpe Diem (Seize The Day) 6