Mathematics - 4 December 2007

2007-12-04 12:12:51 · 1 answers · asked by jhleerph 1

hey guys, i need help with a problem for my trig class. if any of you could answer that would be great, i just don't know how to set up the problem

A store owner bought n dozen toys at a cost of $3.00 per dozen, and sold them at $.75 apiece. Express the profit as a function of n.

2007-12-04 12:12:23 · 1 answers · asked by Erin 1

Ok this is really annoying me:
The question is

(sigma) where n=1 to infinity; is equal to:

[(-3)^(n-1)]/[8^n]

I understand it is an alternating series and that it is convergent.

But, I do not know how to go about figuring out what it converges to.

I don't know how to go about doing this.

Help please...

2007-12-04 12:12:20 · 2 answers · asked by Anonymous

a recipe for bread says the ratio of flour to water should be 3:2 if you use 9 cups of flour how much water will you need?

2007-12-04 12:10:01 · 8 answers · asked by Rachael S 1

how would you solve:

5 > p + 2

-3 + y < (with a line underneath) - (2+3y)

84 - 3a <0

3/4 m < 18

2007-12-04 12:07:17 · 5 answers · asked by ALESANA 7

how do you solve that?

2007-12-04 12:05:18 · 6 answers · asked by missbballqt7 1

2^(x+3) + 2^x = 18 And 3^2x - 10(3^x) + 9 = 0

2007-12-04 12:05:02 · 1 answers · asked by jeffnellytherock 1

2007-12-04 12:01:56 · 5 answers · asked by shellybelly 2

ok i got a crazy math question, first to crack gets 10 points
here it is


Math Power



Look at the following mathematical expression:
12 to the 100th power

You don’t need to find the value of the final product, but what digit will be in the ones place of the final product?

2007-12-04 11:59:22 · 6 answers · asked by Jake Z 1

Can you figure these out please! and expalin how u got the answer if u can:

1)A baseball player makes 168 hits in a season. The numbre of singles in 5 less than 3 times the number of extra base hits. How many extra hits did he make?

2) If 5 more than a certain number is tripled, the result is 72.what is the number?

3) 2 numbersd are in the ratio 5:7. If 12 is added to each number the ratio is 4:5. What are the original numbers?

4)2 motorists start toward eachother from cities 400 miles apart at 1:00 PM. One motorist travels at 42 MPH band the other travels at 38 MPH. When will they meet?

2007-12-04 11:51:12 · 5 answers · asked by nevershoutbecky! 4

2007-12-04 11:44:49 · 1 answers · asked by Anonymous

express each equation in slope intercept form then determine eithout solving wether it has one solution none or infinate.
-x+2y=4
-4xminus2y=-14

Does the system of equation have no solution one or many? explain how YOU can tell without graphing.please.

y=xminus2

6y=3x+7

2007-12-04 11:43:06 · 2 answers · asked by Anonymous

Solve algebraically or graphically!

x^2 + y^2 = 25
3y - 4x = 0

I need help because my notes are chicken scratch and I can't tell by my notes how the hell to do this!

2007-12-04 11:26:43 · 11 answers · asked by Jimmy D 2

my calculator broke so dont call me stupid just lazy

2007-12-04 11:23:43 · 6 answers · asked by Anonymous

2007-12-04 11:22:54 · 9 answers · asked by roger 2

Find 2 positive numbers that satisfy the given requirements
[Two separate problems ]

1.) The sum S and the product is a maximum

2.) The sum of the first and twice the second is 100 and the product is the maximum

Thanks.

2007-12-04 11:21:21 · 2 answers · asked by mastriannichris 1

Another problem I'm having troubles with. Thanks guys!

2007-12-04 11:20:10 · 2 answers · asked by Hotwng 1

I'm trying to make sure that I'm doing this correctly.

Does anyone know how to do these? (Calculus concept)

2007-12-04 11:13:24 · 1 answers · asked by Troy H 2

I was trying to solve a question and couldn't find the answer. Can someone please tell me where I am going wrong?

Question:
Water is leaking out of an inverted conical tank at a rate of 10000cm^3/min at the same time water is being pumped into the tank at a constant rate. The tank has height of 6m and the diameter at the top is 4m. If the water level is rising at a rate of 20cm/min when the height of the water is 2m, find the rate at which water is being pumped into the tank.

My answer:
h/6=r/2
r=h/3

v=(1/3)pi*r^2*h
v=(1/3)pi(h^3/9)

dv/dt = (pi*h^2)/9 * dh/dt
dv/dt = [pi* 40000 * 20] / 9
dv/dt=279252 cm^3/min

Can someone tell me where I am going wrong? Also, please do it using the same method and not the tan-vertex one.

IU

2007-12-04 11:11:32 · 2 answers · asked by IU 1

Can somone show me the steps to how to do this problem please? Thank You.

2007-12-04 11:06:09 · 2 answers · asked by Thanh 1

This is a crazy word problem, I don't even know where to start.

A large institution is preparing lunch menuse containing foods A and B. Food A contains 1 unit of fat per oz, 2 of carbs per oz, and 1 of protein per oz. Food B contains 1 unit of fat per oz, 1 unit of carbs per oz and 1 unit of protein per oz. Each lunch must provide at least 6 units of fat per serving, no more than 7 units of protein, and at least 10 units of carbs. The institution can purchase food A for $0.12 per oz and food B for $0.08 per oz. How many oz of each food should a serving contain to meet the dietary requirements at the least cost?
Any help would be greatly appreciated, thanks in advance and a quick thanks to all the top contributers out there.

2007-12-04 11:05:43 · 3 answers · asked by Happy Killa Pants 2

2007-12-04 10:58:39 · 2 answers · asked by Preston D 1

i don't know how to do r=3-2cos@ <-- unknown degrees.
I have no idea how the negative works when trying to graph the equation

2007-12-04 10:57:39 · 3 answers · asked by Anonymous

4x + 5y=2 and 5x-4y=1

2007-12-04 10:54:34 · 2 answers · asked by ashley n 1

Ok here is the problem:

Solve for t, graph and state the solution in set-builder notation.

t(squared) + 5t - 6 (is greater than or equal to) 0

How do I do this problem? Thank you very much!!

2007-12-04 10:47:52 · 3 answers · asked by vllyofthedamned 2

I have teh follow equation:
c(x) = x^3 - 6x + 45/x, and dx/dt = .05 when x = 1.5

I'm just trying to find the write out x^3 - 6x + 45/x (x = 1.5) using the chain rule, but i'm having problems. and anyone please walk me through?

2007-12-04 10:43:35 · 3 answers · asked by Anonymous

2007-12-04 10:39:00 · 1 answers · asked by ibahramzi 1

heres the info
-mr.klinger and his son own a cattle farm. they have been losing cattle in the swamp, the forest and the river that border their land. they want to build a fence to emclose their farm. they know that the fence will form a semicircle. two sides of a rectangle and the hypotenuse of a triangle.

-the triangle is 300ft
-the square is 600ft and 400ft
-the semicircle is 900ft

part a-how many feet of fencing will they have to buy? please explain

2007-12-04 10:35:23 · 1 answers · asked by ~britbrat~ 1

Vice versa.

Why?

Thanks :)

2007-12-04 10:33:42 · 3 answers · asked by blueanswers 2

A section of highway connecting two hillsides with grades of 6% and 4% is to be build between two points that are separated by a horizontal distance of 2000 feet. At the point where the two hillsides come together, there is a 50-foot difference in elevation.

a) Design a section of highway connecting the hillsides modeled by the function f(x) = ax^3 + bx^2 + cx + d (-1000 less than or equal to x less than or equal to 1000). At the points A and B, the slope of the model must match the grade of the hillside.
b) Use a graphing utility to graph the model.
c) Use a graphing utility to graph the derivative of the model.
d) Determine the grade at the steepest part of the transitional section of the highway.

I need to show work step-by-step for this, so please format your answer as such. Thanks! :)

2007-12-04 10:33:37 · 1 answers · asked by jon0190 1