Mathematics - 27 June 2007

1. y=x+5+9(x/x+5)

2. y=2.14x^-0.1 -0.5x^-1/5.4 + x^2.9

2007-06-27 15:07:57 · 2 answers · asked by poncg004 1

I know that it's super-easy, and that I should be able to get it no problem, but I just drew a blank! Okay, here's the question...

The PIN numbers for a cash card at a bank contain four digits 1-9. All codes are equally likely. Find the number of possible PIN numbers.

This is a question for the end-of-year test for a school in the Dominican Republic. It's the last question. No, I'm not cheating! I'm making the answer key, 'cause the guy who made the test didn't make an answer key!

2007-06-27 15:07:43 · 7 answers · asked by Seth R 2

lim root (x^2+9) -3 / (t^2)
t->0

2007-06-27 14:50:44 · 4 answers · asked by tc 1

Dorothy Wagner is currently selling 20 "I ♥ Calculus" T-shirts per day, but sales are dropping at a rate of 3 per day. She is currently charging $8.8 per T-shirt, but to compensate for dwindling sales, she is increasing the unit price by $1 per day. How fast and in what direction is her daily revenue currently changing?

Her revenue is decreasing at a rate of ____ per day.

2007-06-27 14:44:15 · 1 answers · asked by poncg004 1

Please I need this ASAP

2007-06-27 14:36:13 · 5 answers · asked by pedro 1

what is the remainder when (4!+5!+6!+...+99!) is divided by 84 ?

(1)60

(2)24

(3)30

(4)54

want to choose the answer with consuming less time.

any idea ?

2007-06-27 14:31:44 · 4 answers · asked by calculus 1

2007-06-27 14:25:37 · 4 answers · asked by Joe 1

Please Answer!!!

2007-06-27 14:19:20 · 5 answers · asked by Special K 3

So i get how to do these problems with numbers, but not with letters, so if you can help me i'll be very very thankful...

The directions say to simplify each complex fraction... and th question is

a/b+c divided by a/b-c

any help will be great

2007-06-27 13:56:35 · 4 answers · asked by Anonymous

The volume of a cylinder is given by V=Pi symbol^2h where r is the radius of the cylinder and h is the height of the cylinder. assume the volume of the can is 121 cubic cm.

write h as a function of r. Keep Pi in the functions equation.

what is the measurement of the height if the radius of the cylinder is 3 cm? Round to nearest hundredth's place

2007-06-27 13:47:48 · 4 answers · asked by quepid622 1

If you had to rely on a table of logarithms, what would you prefer? What would be more effective?

With a list consisting of 100 logarithm values...

1) A list of logarithms for the first 100 prime numbers
2) A list of logarithms for the the numbers 0 to 1 in increments of .01

Either list is just as long... but which would you rather have for accurate and effective mathematics?

2007-06-27 13:47:37 · 2 answers · asked by Anonymous

a open top box is constructed from a 4 ft by 6ft rectangular cardboard by cutting out equal squares at each corner and folding up the flaps. Let x denote the length of each side of the square to be cut.

find the function V that stands for the volume of the box in terms of x

what is the value of x that will produce the maximum volume?

thank you

2007-06-27 13:42:18 · 2 answers · asked by quepid622 1

2007-06-27 13:41:30 · 3 answers · asked by bbdoll_67 1

Ok so i need to take the integral of these problem:

(3x^4 - 5) / (x^2)

remember, find the integral. Any help would be appreciated thanks

2007-06-27 13:37:24 · 2 answers · asked by bseballislife9 1

2007-06-27 13:25:51 · 6 answers · asked by TOMIKA B 1

this very frustrating , this is what i did:

1
-------------- * (x7^(x-1))
1 + (7^x)^2

what am i missing? or did I approach it wrong?

2007-06-27 13:05:10 · 4 answers · asked by Anonymous

F x G: F(x) = Sqrt(2x +3) and G(x) = (x^2) +1

Ok, I did the problems, but it would be really helpful if someone checked them for me:

G x F: G(f(x)) = G(Sqrt(2x +3)) = (Sqrt(2x +3))^2 + 1
the Sqrt and ^2 cancel each other out leaving 2x +3 + 1 = 2x +4
domain should be all real numbers,nothing makes it undefined.

F x F: F(F(Sqrt(2x +3)) = Sqrt(2(Sqrt(2x +3)) +3) this is the final equation but for the domain the inside Sqrt equation has to be > 0 so 2x + 3 > 0... 2x > -3.... x> -3/2 is my domain

G X G: G(G(X^2 +1)) = (X^2 +1)^2 +1 = x^4 + x^2 + x^2 +1 + 1 = x^4 + 2x^2 +2..the domain is all real numbers because nothing makes the equation undefined.

2007-06-27 13:00:34 · 2 answers · asked by bid 1

2/3 is an example of a rational number that is not an interger, right? any others?

2007-06-27 12:59:12 · 8 answers · asked by platypus 2

4e^x / 5+e^x dx

I need to find the integral (or anti-derivative) of the problem.
please help

and

the integral of (x+3) / (x^2 + 6x + 8)

2007-06-27 12:54:23 · 3 answers · asked by bseballislife9 1

Find the product.
(p + 10q)(p - 10q)

p2 - 20q2
p2 - 100q2
p2 + 20pq - 100q2
p2 - 20pq - 100q2

2007-06-27 12:49:18 · 10 answers · asked by Anonymous

Why did the person who created pi create pi? It's just a number. Why would he/she make a new name for 3.14?

2007-06-27 12:41:02 · 7 answers · asked by Anonymous

Why did the person who created pi create pi? It's just a number. Why would he/she make a new name for 3.14?

2007-06-27 12:40:31 · 5 answers · asked by Anonymous

Your car's fuel gauge is broken. The car can go 22 miles on one gallon of gasoline. You start a trip with 13 gallons of gasoline. If you want to always have at least one gallon in the tank, what is the farthest you should drive before stopping for more gasoline? Explain.

2007-06-27 12:10:47 · 7 answers · asked by Anonymous

2x -3 = 0.4x +3.4

and this one

3x -2(x-3) = 15

2007-06-27 12:08:03 · 3 answers · asked by lushay 2

40......find a linear model that has the indicated values.
f(2)=2, f(4)=1

thanks!

2007-06-27 11:46:37 · 5 answers · asked by Anonymous

ok. i need to know how to do this problem as it is driving me insane trying to figure it out. Lets take a certain amount like 100. I got to this number by taking another number "x" and multiplying "x" by 5.25%, adding that product to "x" and getting 100. now my question is, what is the original number and how did you get to that number?

2007-06-27 11:44:37 · 9 answers · asked by Boomdoggie666 1

Find the indicated products and quotients.

6a OVER 8b divided by 10c OVER 12d

-a^2b OVER b^2c divided by a^2c OVER b^2c^2

thank you to anyone who can help!

2007-06-27 11:26:21 · 4 answers · asked by Anonymous

a. 18 millimeter
b. 18 centimeters
c. 180 centimeters
d. 18 meters

2,Which decimal is the standard form of this number?
twenty-three and five hundredths
a.23.5
b.23.05
c.23.005
d.2.35
3. Ricky made 16 signs for a school party. She used a roll of paper 43.2 meters long. What was the average lenght of the signs?
4.Which number would have 700+8 as part of its expanded notation?
a. 70,708
b. 780,078
c.7,008
d. 708,080

5.Davey 75 minutes lifting weighs at the gym.How many hours
did he spend lifting weights?

6.Which of these numbers has the least value?
a. 189.62
b. 198.26
c. 198.62
d.189.26

7.Why is 17 too small to be the quotient for 3,424/32?

2007-06-27 11:24:16 · 2 answers · asked by rosemariestewart64 1

Does every bounded sequence converge? Prove. A sequence is bounded if there exists an M>=0 such that |Sn|<= M for all n belonging to N.

2007-06-27 11:17:07 · 4 answers · asked by news4van 1

2007-06-27 11:13:05 · 13 answers · asked by Anonymous