Mathematics - 5 October 2007

If 7000 dollars is invested in a bank account at an interest rate of 5 per cent per year, compounded continuously. How many years will it take for your balance to reach 20000 dollars?

2007-10-05 14:34:56 · 3 answers · asked by RedSparkle 1

2007-10-05 14:23:23 · 4 answers · asked by texan3715 1

What is the parametric equation for a rectangle? Thanks

2007-10-05 14:22:05 · 2 answers · asked by Anonymous

If I have a building that is 13,000 sq. feet and a building that is 5,880 sq. feet, what is the percentage difference? Or shall I say the percentage decrease? How do you do this?

2007-10-05 14:18:42 · 4 answers · asked by momfirst 1

My grandson, my son [his father] and i share the same birthday . Tis year i remarked to my son " you know of course that today all three of our ages have become prime numbers. But did you realize that for the last17 years prior to this year whenever your age was a prime number so was mine and vise versa?" . yes he replied and 17 yers from now i will say to MY son " you know for the last 18 years prior to this year whenever your age was a prime number so was mine and vise versa". how old are we?

not a slightest clue as to how to do this problem

2007-10-05 14:13:47 · 4 answers · asked by Anonymous

answer and problem work.Please.

2007-10-05 14:12:18 · 9 answers · asked by Anonymous

It's been a long time since using this method, anyone who can refresh my memory would be greatly appreciated. Thanks! :)

2007-10-05 14:07:28 · 5 answers · asked by Mizzy 3

You and your friend are playing tennis. Your friend lobs the ball high into the air, hitting it 3 feet above the court with an initial vertical velocity of 40 feet per second. You back up and prepare to hit an overhead smash to win the point.
a.) Use the model h=-16t^2 + v0t + h0 to write an equation giving the height of the lobbed tennis ball as a function of time.
b.) At what time t does the ball reach its maximum height above the court? What is the maximum height?
c.) If you plan to hit the smash when the ball falls to a height of 8 feet above the court, how long do you have to prepare for the shot?
d.) If you plan to hit the smash when the ball is between 6 feet and 9 feet above the court (inclusive) what are your possible preparation times?
e.) Suppose you hit the smash when the ball is 8 feet above the court. It takes 0.1 second for the ball you smashed to hit the court on your friend's side of the net. What was the ball's initial velocity coming off your racket?

THANKS!

2007-10-05 14:01:51 · 2 answers · asked by pigosaurus 1

a/b=c/d


Also, how would you solve for b in this case:

5/2=1/2(b-c)

2007-10-05 13:57:17 · 9 answers · asked by Anonymous

Is there any value of n other than 1, 2, and 4, such that n^n+1 is a prime?

2007-10-05 13:39:38 · 6 answers · asked by swimgirl273 2

answer and problem work.

2007-10-05 13:33:17 · 13 answers · asked by Anonymous

2007-10-05 13:30:31 · 3 answers · asked by . 1

This is a college-level course, and I really need to know how far back I need to go to teach myself how to get there. I'm stuck, I can't go any further in college until I pass this course, which I have already taken twice. I need to know the name of a pre-requisite, or a text...something...hellllp!

2007-10-05 13:28:31 · 7 answers · asked by tlwdthn 1

4(2x+1)=27+3(2x-5)

2007-10-05 13:27:24 · 6 answers · asked by Anonymous

Find the work done by force F = -3j (pounds) applied to distance that moves on a line from point (1,3) to (4,7). Assume distance is measured in feet. I just started learning vectors so I'm not sure if the following is correct:
Would the distance be (4-1, 7-3) = 3i + 4j?
Since W = F•D, is the answer (-3j) • (3i + 4j) = -12 foot-pounds? Thanks in advance

2007-10-05 13:24:07 · 5 answers · asked by MathGuy 6

If x + 1/x = 2, what is the value of x^2 + 1/x^2 ?

When possible, with explanation please.
Thanks in advance!

2007-10-05 13:23:45 · 6 answers · asked by Anonymous

(a) find all zeros of the function (b) write the polynomial as a product of linear factors, (c) use your factorizatoin to determine the x-intercepts of the graph of the function.

#27.) f(x)= x^2-14x+36

I'm not sure how to work it out so any help would be very, very much appreciated. Person with most answers and worked out understandably will receive the 10 points. Thanks all, for trying, and helping my future!

2007-10-05 13:23:11 · 1 answers · asked by Anonymous

3x + 7 = 5x - 11

2007-10-05 13:09:04 · 8 answers · asked by Lucia I 1

2007-10-05 12:48:35 · 11 answers · asked by sugaaars 1

How old are they now?

2007-10-05 12:40:12 · 12 answers · asked by Anonymous

Ron pours 4 ounces of coffee into an 8 ounce cup and 4 ounces of cream into a 2nd cup of the same size. She then transfers 1/2 the coffee from the 1st cup to the 2nd, and after stirring thoroughly, she transfers 1/2 the liquid in the 2nd cup back to the 1st.What fraction of the liquid in the 1st cup is now cream???

2007-10-05 12:34:26 · 11 answers · asked by ~USA~ 2

if you don't know, then plz tell me what a reciprocal is

2007-10-05 12:31:32 · 10 answers · asked by Anonymous

use two equations in two variables to solve the folowing question
at an IMAX theater, the giant rectangular movie screen has a width 13 feet less than its length. if its perimeter is 270 feet, find the area of the screen.

2007-10-05 12:29:30 · 3 answers · asked by Lindsay Y 1

How would you find the first number?

2007-10-05 12:19:57 · 7 answers · asked by Anonymous

Last Math problem I'm struggling with.....

Solve and check your answers.

-4(2x - 3) = -8x + 5

2007-10-05 12:12:11 · 7 answers · asked by Anonymous

Help!
Solve the problem and check your answers.

6x - 1/5 - 2x/3 = 3


(The way this is written is in fractions. The top 6x minus 1 over bottom number 5 minus top number 2x over bottom number 3 equals 3)

2007-10-05 12:09:41 · 7 answers · asked by Anonymous

I'm in pre calc, and we're reviewing algebra II right now. I'm having trouble with a wksht problem (factoring):
R ^(2/3) - R ^(1/3) - 20 = 0

please don't just give me the answer! give me a little explanation. thanks!

2007-10-05 12:06:55 · 4 answers · asked by Michelle 2

Find the area of the segment of the circle shaded in blue. The radius of the circle is 20 units and the base of the triangle is 24 units. Use pi = 3.14 and round your answers to the nearest hundredth.
Show your work for credit.

http://i101.photobucket.com/albums/m53/yoobritt/06_06_18.gif

2007-10-05 12:05:34 · 4 answers · asked by Anonymous

Somebody help me out with this Math problem?

Solve for x and check your answer.

9x + 7 = 5x – 3

2007-10-05 12:05:14 · 8 answers · asked by Anonymous

Find the equation of the line tangent to the ellipse
b^2*x^2 + a^2*y^2 = a^2*b^2
in the first quadrant that forms with the coordinate axes
the triangle of smallest possible area
(a & b are positive constants)

2007-10-05 11:52:40 · 4 answers · asked by roguetrader12002 4