Mathematics - 21 September 2006

A Ferrari is traveling at 30 miles per hour on a head-on collision course with a Maserati, which is being driven at a leisurely 20 miles per hour. When the two cars are exactly 50 miles apart, a very fast fly leaves the front fender of the Ferrari and travels towards the Maserati at 100 miles per hour. When it reaches the Maserati, it instantly reverses direction and flies back to the Ferrari and continues winging back and forth between the rapidly approaching cars. At the moment the two cars collide, what is the total distance the fly has covered?
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{Solution}

At first glance it may seem that a horrendous calculation is necessary to solve this: the sum of an infinite series of numbers that get smaller and smaller as the cars approach each other. But if you focus on time rather than distance, a solution is easy. The cars are 50 miles apart and traveling towards each other at a combined speed of 50 miles per hour, so they will meet in one hour. In that hour, a fly that flies at 10

2006-09-21 06:14:26 · 5 answers · asked by Anonymous

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I just bought a TI 89 calculator and wondering if it will be the same as a TI 84. I never use a graphing calculator before so I thought that spending more money on a calculator would get me more features; however, most of the people that I talk to use a TI 84.

Some even say that college exams will not let me use a TI 89.

What is the different? Should I sell my TI 89 and buy a TI 84 instead. I'm planning to use it for college.

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2006-09-21 06:03:22 · 4 answers · asked by Anonymous

Write the solution set in interval notation
There is a graph that I will be attempting..
any ideas?

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Find the area enclosed by the curve f(x)and the line

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You know, like a program that will give me a random number out of a group of numbers I determine.....

2006-09-21 05:26:29 · 10 answers · asked by Anonymous

help on fractions please?
well i need help on fractions and how to add divide and subtract them
please help
examples:
3 1/7 + 2 2/5
8 1/12 - 4 3/4
2 8/7 divide by 8
please help

15 minutes ago
the way my teacher showed me was 3 1/7= 22/7 and 2 2/5 = 12/5
and then i got 24/35
how come?
does anyone know that way?


sorry 4 asking again

2006-09-21 05:16:53 · 7 answers · asked by ???????? 2

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2006-09-21 04:45:00 · 7 answers · asked by Anonymous

area of a figure is fixed , then how can it have irrational value.

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2006-09-21 04:40:29 · 11 answers · asked by Anonymous

The least integer of a set of consecutives integers is -25. If the sum of this integers is 26, how many integers are in this set?

Thanks

2006-09-21 04:39:04 · 4 answers · asked by Nif 2

well i need help on fractions and how to add divide and subtract them
please help
3 examples:
3 1/7 + 2 2/5
8 1/12 - 4 3/4
2 8/7 divide by 8
please help

2006-09-21 04:32:37 · 19 answers · asked by ???????? 2

2006-09-21 04:25:02 · 4 answers · asked by babyjay 1

Prove:

Tn=e^(-1)*integral[x(subscript n)*e^x]dx is equal to

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note: boundary conditions for integral are from 0 to 1

2006-09-21 04:20:38 · 3 answers · asked by Rori S 1

The decimal number above consist of only 1's and 0's to the right of the decimal point . The first 1 is followed by one 0, the second 1 is followed two 0's, the third 1 is followed by three 0's, and so on. What is teh total number of 0's between the 98th and the 101st 1 in this decimal nuber?

I'll appreciate an explanation on how to solve it. Thanks a lot!!

2006-09-21 04:16:39 · 7 answers · asked by Nif 2

i really need this for school.our teacher asked us and i have to know as many math trivias as i can use because i was hoping to joing a math trivia contest. i tried searchin the net but the trivias are not that cool. you know..just normal..i just need help so badly

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Can someone tell me how to complete the square on an expression that starts with an integer? For example:

6 - 3x - x^2

thanks!

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a.20oz.bag b.10oz,bag

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what does it mean whyen it says find each expression??

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2006-09-21 03:28:05 · 6 answers · asked by pmj398 1

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HOW CAN WE KNOW THAT A GIVEN NUMBER IS DIVISIBLE BY 7 OR NOT?

2006-09-21 03:19:41 · 7 answers · asked by nats 1

What does your employer take or deduct?a.$13.77 b.$1,377.00 c.$1.37 d.$137.70

2006-09-21 03:17:32 · 8 answers · asked by Tony R 1

Define a relation ~ on R2 by (x1, y1) ~ (x2, y2) iff x1 = x2

Question:
verify that ~ is an equivalence relation on R2.

2006-09-21 02:20:02 · 4 answers · asked by David F 2

This is a trivia question

2006-09-21 02:17:18 · 5 answers · asked by Anonymous