Mathematics - 15 November 2007

Janice invested $12,000 into two funds. One of the funds returned 6 percent interest and the other returned 8 percent interest after one year. If the toal interest for the year was $880, how much did she invest in each fund?

2007-11-15 09:17:32 · 3 answers · asked by ??? 4

Two vertical poles of lengths 6 ft and 8 ft stand on level ground, with their bases 10 ft apart. Approximate the
minimal length of cable that can reach from the top of one pole to some point on the ground between the poles
and then to the top of the other pole.

2007-11-15 09:16:38 · 2 answers · asked by deadman 2

it is an eleventh grade math riddle/problem but I do not know how to get the answer.

2007-11-15 09:10:16 · 8 answers · asked by Anonymous

An airplane flies at an an average speed of "K" mph. How far will it fly at that rate in 90 minutes? Write the equation. Let "N" stand for the answer ( Hint: convert 90 minutes to hrs. use D=rxt to write the equation)

2007-11-15 09:08:12 · 7 answers · asked by bodigger 1

This is one more i am stuck on. L- Hospitals Rule

Find the limlt. Use L'Hospital's Rule where appropriate. If there is a more elementary method, consider using it. If L'Hospital's Rule doesn't apply, expla!n why.

1. lim t-->0 for ( e^(3t) - 1 ) / t

2007-11-15 09:01:24 · 4 answers · asked by brobo8 1

I'm studying for a test and I need help!

Question:
find the value of the three primary trigonometric ratios for angle A

A is opposite to 4 and adjacent to 8

three primary trig ratios = sin, tan and cos

for sin i looked at the answers and it's 1/square root of 5

how did they get this answer??!?

thanks!

2007-11-15 08:58:47 · 3 answers · asked by Besch 4

Hi im stuck on this one. Anyone got a step by step. Thanks
It has to do with Rolles Theorem, and mean value theorems.

1. Show that the equation 2(x) -1 - sinx = 0 has exactly one real root

2007-11-15 08:57:55 · 2 answers · asked by brobo8 1

im stuck on 3-5, and help appreciated.

1. Flip a coin 5 times and record the outcomes here.
H=2/5 T=3/5
2. Start again. Flip the coin 25 times and keep track of the outcomes. Record them here.
H=11/25 T=14/25

Draw a histogram from the data in question 1, and a separate histogram from the data in question 2. Also draw a histogram displaying the theoretical probability of head and tail outcomes. Use these to answer questions 3-5.
3. Verify that the sum of the experimental probabilities of flipping heads or tails add up to 1. Check both sets of your data. Show your work.
4. Did you notice that your experimental data from question 2 was closer to the theoretical probability than your data from question 1? Explain briefly using your data to support your answer.
5. Predict the experimental probabilities of flipping heads or tails if you flipped the coin a total of 100 times.

2007-11-15 08:56:05 · 1 answers · asked by Anonymous

Determine the value(s) for which each expression is undefined.

(-n2 + 36)
---------------------------
(n - 6) (n2 + 12n + 36)

2007-11-15 08:30:18 · 7 answers · asked by kim_jim25 1

2007-11-15 08:30:16 · 11 answers · asked by Jelsie R 1

2007-11-15 08:27:34 · 8 answers · asked by Jelsie R 1

If someone is 181cm tall, how many inches is that? 5' what?

2007-11-15 08:22:04 · 6 answers · asked by Anonymous

2007-11-15 08:18:26 · 7 answers · asked by Jelsie R 1

I am doing an assignment for my math class and i was wondering why that occurs?

2007-11-15 08:17:21 · 5 answers · asked by Anonymous

3 x (2 x n + 17) - 51 = 4 x n - 44

please make sure your math is correct

2007-11-15 08:12:21 · 5 answers · asked by ktunkers 2

A battery is connected to a series circuit with a resistor and an inductor.
1.) If the voltage of the battery is 110 V, the inductance of the inductor is 0.8 henry and the resistance of the resistor is 150 ohms determine a DE

2.) Solve the DE and receive math model for the current I if the initial current was zero.

3.) Predict the value of the current at time 0.6 seconds.

2007-11-15 08:11:09 · 4 answers · asked by Jaylen R 1

a. (t^2-9)(t^2-9)
b.(t-3)^2(t+3)^2
c.(t-3)(t+3)^2
d.(t-3)(t+3)(t^2+9)

2007-11-15 08:10:27 · 6 answers · asked by BabyGirl82985 1

(2radical6)(5 radical3)


I don;t really understand how to do radicals so could you explain how you did it?

2007-11-15 08:09:46 · 4 answers · asked by Anonymous

multiply using teh vertical method.

(m^2-5mn+3n^2 )(m^2+4mn-2n^2)

2007-11-15 08:03:05 · 1 answers · asked by God Bless America!~ 4

2007-11-15 07:58:53 · 6 answers · asked by Anonymous

thanks for help other hope you all will answer for it as well soon. thanks again and plz give answer of yhis asap/

2007-11-15 07:57:20 · 2 answers · asked by Anonymous

Prove that the Newton-Raphson sequence for the equation f(x)=(x-1)^2=0 converges for every real initial guess. Does the result still hold if the initial guess is a complex number?

2007-11-15 07:45:16 · 3 answers · asked by David C 1

i need a rap about prime numbers from 1-50.
please please please at least try to help me!
thanks a lot!
10 points easy!
=] =] =]

2007-11-15 07:41:15 · 16 answers · asked by Anonymous

The point of the graphp of f(x)=x^2+4*x-14 at which the tangent line is perpendicular to teh line y=5*x-15 is (_____, _____)

2007-11-15 07:41:08 · 2 answers · asked by ws 3

Everyone knows the saying 'Two wrongs don't make a right', yet in mathematics, the product of two negative values equals a postive value. I would really like to know if anyone knows the theory/concept behind this. Please explain as detailed as possible.

2007-11-15 07:37:48 · 14 answers · asked by A 3

2007-11-15 07:36:52 · 16 answers · asked by jdaws9876 1

http://smg.photobucket.com/albums/v700/XoXCoNnIeEe/?action=view¤t=fdsafdsa.jpg

2007-11-15 07:33:15 · 2 answers · asked by Anonymous

I have to find the x-intercept of y=cube root(-x+1) +2. I worked it out as follows:

(Important: +2 is not part of the cube root, only -x+1 is under the root)

0=cuberoot(x+1)+2
cuberoot(x+1)=-2
x+1=-8*
x=-9

* I cubed both sides to get rid of the cube root.

When I type it in a graphing calculator it appears that x-intercept is actually 9, not -9.

2007-11-15 07:32:32 · 3 answers · asked by IK 3

A deductive proof is used to prove that the product of any two consecutive whole numbers is even is started below. What could the next step be?

One of the two consecutive numbers is even and therefore has a factor of 2.

A) Since the product is even it has a factor of two.
B) Since the product will also have a factor of 2, the product will be even.
C) Since the numbers have a factor of two they are even.
D) Since the numbers are consecutive their product is even.

2007-11-15 07:30:18 · 2 answers · asked by Anonymous

6y^2 - 36 = 6y

any help would be greatly appreciated

2007-11-15 07:29:17 · 8 answers · asked by alex 1