Mathematics - 24 July 2007

An outfielder picks up a ground ball and wants to make a quick 150ft throw to first base. To save time, he does not throw the ball directly to the first baseman. He skips the ball off the artificial surface at 75ft so that the ball reaches first base after a bounce. The equations

x = v_o (t)(cosΘ)
and
y = -16t^2 + v_o (t)(sinΘ) + h_o

give the coordinates of the ball at time t seconds for an initial angle of Θ degrees, initial velocity v_o ft/sec, and initial height of 5 ft and the ball is caught at a height of 5 ft.

(1)At what angle from horizontal must the ball be thrown to reach first base without a skip?
(2)At what angle from horizontal must the ball be thrown so that is strikes the ground at 75ft?

2007-07-24 10:48:06 · 2 answers · asked by Bosworth 1

2007-07-24 09:51:31 · 13 answers · asked by Anonymous

I need the formulas to:
(a) convert something in cm2 to m2
(b) convert m2 to cm2

2007-07-24 09:39:36 · 6 answers · asked by PreppyGirl! 1

Write an equation in slope-intercept form of the line with the given conditions.

Passes through (-3,7) and (2,4)

2007-07-24 09:29:12 · 3 answers · asked by MizzKin 1

The number which best completes the sequence below is:
100 52 28 16 10

My Answer:



4.

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5.

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6.

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7.

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8.

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2007-07-24 08:48:36 · 8 answers · asked by Michael H 1

I did this polynomial or whatever it is and wonder if the answer I got is right

(-2y) (3x square + 3y - 1)

I got for the answer -6y+3x square - 1.

2007-07-24 08:29:32 · 7 answers · asked by Anonymous

Please help me with these two problems. I need to know quickly if possible.

If Sarah Can do a job in 5hrs and Dick and Sarah working together can do the same job in 2 hours, find how long it takes Dick to do the job alone.

The numerator of a fraction is 4 less than the denominator. If both the numerator and denominator are increased by 2, the resulting fraction is equivalent to 2/3. Find the fraction.

2007-07-24 08:28:09 · 3 answers · asked by .......... 2

Don't know

2007-07-24 08:19:23 · 10 answers · asked by babyruth45304 2

I'm trying to make use of the definite integral property

My equation was x^2dx evaluated between 2 and -2.

Here is my math. Let me know if it's right.
x^2dx=1/3 x^3

evaluated: (1/3 2^3)-(1/3 (-2)^3)=8/3+8/3=16/3

Did i do this correctly?

2007-07-24 08:02:55 · 9 answers · asked by t b 1

Perform the indicated operations told and make sure to show work so I know what to do.

1. (3b square + 7b + 5) + (3b - 8)

2. ( 6x cubed - 4x square+3) + (-2x cubed+7x square - 5

3. 8 (2y square + y + 1)

4. (7x square - 8x + 6) - (2x square + x-3)

This stuff has to do with polynomials I think adding, subtracting and multiplying, hope someone knows them cause this stuff is due tommorow.

2007-07-24 07:53:52 · 6 answers · asked by Anonymous

2. Simplify (2 square root 12) +(4 square root 27)?
I think I am getting thrown off because of the addition and multiplication, can anyone help?

2007-07-24 07:51:57 · 12 answers · asked by Anonymous

for example it says:

Write the expression with the base 3:
a. 3 to the power of 2 times 3 to the power of 5

OR

Write 2 to the power of 60 as an exponent with the base of:
a. 4 [ the answer is 4 to the power of 30. WHY? & HOW?]

2007-07-24 07:48:08 · 11 answers · asked by taylorclueless. 3

Polynomials and stuff

Consider the Polynomial

3b to the 5th - b to the 4th - 2b cubed + b square -18b- 3


How many terms does the polynomial have?

List the terms of the polynomial

What are the coefficients of each of the terms?

2007-07-24 07:46:40 · 5 answers · asked by Anonymous

Recently a math or science question stated baldly: "I don't want an explanation. I just want an answer." I did not answer that question.

There are times when all of us would like an answer -- without an explanation. That's fine, and I have no complaint in general. But all too often, someone has a homework assignment, and all they want is to get it finished. Some have the chutzpah to list six problems, all identical in concept, and expect to get the six answers [which they often do : < ]. There seems to be little wish to learn to do the work on their own. There is even the notion that only a nerd would do the work if a friend can supply the answer.

When someone posts a question with "I got the following. Is that correct?" or "I'm having problems with this assignment. Can someone give me a clue?" I respond as often as I am able. I know that textbooks are not always clear, and that an alternate explanation can clarify things.

Am I wrong to 'help,' but not to 'answer?'

2007-07-24 07:40:31 · 5 answers · asked by anobium625 6

2007-07-24 07:40:01 · 2 answers · asked by Troy 1

2. Simplify: square root 27 - square root 3?

I got 2 square root 3x for the first one and 9 square root 3 on the second one. Is this right?

2007-07-24 07:33:04 · 8 answers · asked by Anonymous

A boat cruises downstream for 2 hours before heading back. It takes 3.5 hours going upstream to get back. If the speed of the stream is 8 mph, what is the speed of the boat in still water?

2007-07-24 07:32:13 · 4 answers · asked by t.wes87 2

I keep confusing simplify and evaluate can someone please help and give me an explanation that may help me understand the difference better

2007-07-24 07:17:43 · 8 answers · asked by Anonymous

find all soluation..............

2007-07-24 07:11:43 · 8 answers · asked by Anonymous

The question on the form I'm filling out says (16a minus 16b), so in my case it would be 16,211 minus 15,593, but which number do you subtract from? Is it 16,211-15,593 or 15,593 -16,211? Would it be a negative number or positive?

2007-07-24 07:09:49 · 8 answers · asked by sarah820w 1

The probability that it will be rainy on Monday is 7/10. The probability that it will be windy on Monday is 6/10. These events are independent. What is the probability that it will be rainy or windy on Monday?

2007-07-24 07:03:57 · 8 answers · asked by t.wes87 2

I got 6.71 is this right?

2007-07-24 07:01:35 · 8 answers · asked by Anonymous

I keep getting 6.56...is this right? I feel like I am doing it wrong?

2007-07-24 06:59:29 · 6 answers · asked by spiritmoonshine 1

I really dont get this stuff.

2007-07-24 06:59:05 · 3 answers · asked by babyruth45304 2

X + 2Y - Z = 5
2X - 4Y + Z = 0
3X + 2Y + 2Z = 3

OK I know there is a long way and a short way. Please show me the short way. Thankyou.

2007-07-24 06:56:54 · 4 answers · asked by Nonya 1

The weights of a grapefruit follow a normal distribution. A random sample of 12 new hybrid grapfruit has a mean weight of 1.7 lb w/sample standard deviation of .24 lb. Find a 95% confidence interval for the population mean weight of hybrid grapefruit.

2007-07-24 06:49:46 · 2 answers · asked by Anonymous

3x+2y+z=50

I have the following information.

x>=1
y>=1
z>=1

any of x,y,z could be >=10


can we solve for x,y,z ?

please advice some steps to follow.

thank you

2007-07-24 06:45:11 · 5 answers · asked by calculus 1

2007-07-24 06:43:24 · 3 answers · asked by mramahmedmram 3

2007-07-24 06:37:59 · 2 answers · asked by mramahmedmram 3

I dont know how to work any of these.

2007-07-24 06:32:52 · 4 answers · asked by babyruth45304 2