Mathematics - 31 October 2007

I think they should include symbols like

- plus or minus
- square root
- inequality signs
- pi

... etc.

I think it would make things a lot clearer... they could possibly set up a code so that you would need to type something like

$sqrt$

or something like that. What do you guys think?

2007-10-31 14:38:07 · 6 answers · asked by de4th 4

F (x) = -4 x ^10 ?

2007-10-31 14:30:23 · 2 answers · asked by Josianne 3

2007-10-31 14:06:10 · 6 answers · asked by Anonymous

a shoe store sells about 200 pairs of a new basketball shoe each month when it charges $60 per pair.For each $1 increase in price, about 2 fewer pairs per month are sold.

How much per pair should the store charge to maximize monthly revenue?
You: what is the maxium revenue?

the answers are $80; $12800.
The point is I don't know how to get the answers!
please give me explanation not just the answer! thank you!

2007-10-31 14:01:16 · 7 answers · asked by Laivwudbbetorw/omwuah 1

2007-10-31 13:55:14 · 7 answers · asked by Ashley B 1

A tank contains 100L of pure water. Brine that contains .1 kg of salt per liter enters the tank at a rate of 10L/min. The solution is kept thoroughly mixed and drains form the tank at the same rate. How much salt is in the tank after 6 minutes?

2007-10-31 13:55:12 · 1 answers · asked by Q 1

Force 1 = 45 pounds
Force 2 = 60 pounds
Resultant force = 90 pounds

(hint: write force 1 as a vector in the direction of the positive x-axis and force 2 as a vector at an angle theta with the positive x-axis) <--(what the book suggested...)

2007-10-31 13:54:32 · 3 answers · asked by Andrew T 2

So how do I work this?

(1 to 2)(y to y^3) e^(x/y) dx dy

the 1 to 2 is the vetical squigly line for integral.

any help would be appreciated, thanks

2007-10-31 13:51:00 · 3 answers · asked by nick 4

2007-10-31 13:26:26 · 3 answers · asked by Q 1

Writ an equation of a parabola with the given focus and directrix.

2007-10-31 13:15:39 · 1 answers · asked by Anonymous

Please provide explanation. My guess 1/-0.4 but I think only integers count as fractions?

2007-10-31 13:15:28 · 3 answers · asked by Selene 1

A machine is rolling a metal cylinder under pressure. The radius of the cylinder is decreasing at a constant rate of 0.05 inches per second and the volume V is 128pi cubic inches. At what rate ios the length h changing when the radius r is 2.5 inches? [hint: V = pi(r^2)h]

please explain the problem. just an answer wont help

2007-10-31 13:14:42 · 4 answers · asked by NEEDSHELP 1

what is the answer? im just testing someting, its an expiriment

2007-10-31 13:13:30 · 2 answers · asked by Jamie K 1

4 + 4 = ,6 x 6 = ,12 + 12 = ,24 x 24 = ,48 + 48 = ,96 x 96 = .

2007-10-31 13:09:50 · 10 answers · asked by Simon 3

math

2007-10-31 13:06:45 · 5 answers · asked by Shannon R 1

If you have a semi-circle, which the flat side is 50cm, what is the area of the smallest possible square which the semi-circle will fit into? I got 1250cm, but feel as this is wrong. Any help?

2007-10-31 13:05:38 · 6 answers · asked by glassharlequin 2

2007-10-31 12:57:36 · 10 answers · asked by pualla walla 1

Write two linear equations you can use to graph y = |-2x - 3|.

**Multiple Choice**
A. Y = 2x - 3 ; Y = -2x + 3
B. Y = 2x - 3 ; Y = 2x + 3
C. Y = -2x + 3 ; Y = 2x + 3
D. Y = -2x - 3 ; Y = 2x + 3

2007-10-31 12:52:05 · 1 answers · asked by Anonymous

1. The surface area of a sphere is decreasing at the constant rate of 3π cm²/sec. At what rate is the volume of the sphere decreasing at the instant its radius is 2 cm?


2. At noon, a ship sails due north from a point P at 8 knots/hr. Another ship, sailing at 12 knots/hr, leaves the same point 1 hour later on a course 60º east of north. How fast is the distance between the ships increasing at 2:00 PM? at 5 PM? Hint: Use law of cosines : a² = b² + c² - 2bc cos A

3. A fly is crawling from left to right along the top of the curve y= 7 - x². A spider waits at the point (4,0). Find the distance between the two insects when they first see each other.

Thanks

2007-10-31 12:44:42 · 2 answers · asked by BigE-zy 2

can any one factor -6x^2 -5x + 4 ? thanks

2007-10-31 12:27:27 · 3 answers · asked by nikeballer15 2

If f(x) = 3 \sqrt{x} (x^3- 4 \sqrt {x} +2 ), find f'( 16 ).

2007-10-31 12:26:13 · 1 answers · asked by Jenny S 2

a small man realized he couldnt finish his pizza in fact he could only eat exactly half of it.

If the diameter of the pizza was 50cm, and it was a perfect semicircle, what is the area of the smallest square box, in square centimetres, that could contain the half pizza? Please disregard the thickness of the box, round to the nearest whole number, and please only submit a number for your answer.

2007-10-31 12:22:01 · 3 answers · asked by Anonymous

If you split a rectangle in half by its diagonals, do the resulting ratios for the triangles side lengths become a 30-60-90 triangle? (2:sqrt(3):1)

2007-10-31 12:20:26 · 3 answers · asked by Anonymous

a small man realized he couldnt finish his pizza in fact he could only eat exactly half of it.

If the diameter of the pizza was 50cm, and it was a perfect semicircle, what is the area of the smallest square box, in square centimetres, that could contain the half pizza? Please disregard the thickness of the box, round to the nearest whole number, and please only submit a number for your answer.

2007-10-31 12:18:10 · 2 answers · asked by Anonymous

2007-10-31 12:11:52 · 1 answers · asked by Dalila 1

I do NOT need answers, I need you to provide me with a better understanding of the process to get to the answers. If possible can you provide keywords in the question that lead to why you did what you did. Please do not skip steps or use calculator functions. All I will have available to me is a basic calculator and a table with Z Scores, please check for the rest of my questions:

A recent survey was conducted to compare the cost of solar energy to the cost of gas or electric energy. Results
of the survey revealed that the distribution of the amount of the monthly utility bill of a 3-bedroom house
using gas or electric energy had a mean of $126 and a standard deviation of $14. If nothing is known about the
shape of the distribution, what percentage of homes will have a monthly utility bill of less than $98?

The answer is at most 25% please explain as, best you can, the mental thinking and steps toward getting there.

2007-10-31 12:06:41 · 1 answers · asked by Anonymous

What is the area of a triangle with base 11 cm and height 21 cm?





Enter a decimal.
_________cm2





How would you get a decimal out of that? O.o

2007-10-31 12:03:46 · 5 answers · asked by Anonymous

The Zunino family weighed their 5 pumpkins 3 at a time. The following weights were recorded: 3006, 3035, 3093, 3122, 3151, 3180, 3209, 3238, 3267, 3325. Find the weight of each pumpkin.

Please help me write the equations to solve this problem. Thanks!

2007-10-31 12:01:03 · 3 answers · asked by ThistleThorn 2

Answers Always, Sometimes, Never
Thank you

2007-10-31 11:45:10 · 8 answers · asked by Anonymous

2007-10-31 11:43:20 · 3 answers · asked by Kat 1