Mathematics - 20 July 2007

Multiply. Write the answer in scientific notation.
(2.4 * 10^–5)(4 * 10^–4)
I am so confused please help.
Thanks

2007-07-20 05:48:02 · 6 answers · asked by Anonymous

5x^2+8x+7=0
(7)^1/2y^2-6y-13(7)1/2=0
2x^2+x-1=0
4/3x^2-2x+3/4=0

2007-07-20 05:05:29 · 4 answers · asked by littlesoutherner12 1

A person in an airplane sights a car on the ground at an angle of depression of 40 degrees. The sight distance from the plane to the car is 2700 ft. Find the altitude of the airplane to the nearest foot.

a.2068 ft
b.2266 ft
c.4200 ft
d.1736 ft

2007-07-20 04:50:28 · 6 answers · asked by confused 3

Find g, if it is known that g''(q)=1+3sinq, and that g(0)=1 and g'(0)=0

I don't get this question..
solving it for hours
please help :))

2007-07-20 04:29:07 · 4 answers · asked by Anonymous

(think of of 1ppm as 1 g of chl. per 1 million grams of water) The density for water is 1.00 g/ml and the density of chl. is 1.10 g/ml. What volume of the chl. is requiered to produce a chl. level of 1 ppm in an 18,000 gallon pool?

2007-07-20 03:59:24 · 3 answers · asked by Mr.Pie 1

Use +, -, x, or divide for each.
8 6 4 divide 2 =20

2007-07-20 03:50:38 · 2 answers · asked by Anonymous

1. Determine when the function is increasing and when it is decreasing.
(a). f(x) = In (1 + x^2)
(b).f(x) = xe^(-x).

2007-07-20 03:44:20 · 3 answers · asked by ppp 1

per instructor. $15 per lesson for room rental & $3 per student misc. If x is the # of students enrolled , express the profit in terms of x. find the profit if 10 students enroll in the class.

2007-07-20 03:24:38 · 3 answers · asked by Anonymous

2007-07-20 02:53:01 · 6 answers · asked by faiz 1

How do I simplify the following expressions:

1. 5x^2 * 2x^5
2. (-2c^3)^2
3. t^3 * t^(n-3)
4. (x^m)^n * (x^n)^(n-m)

Showing all the steps will be very helpful, and thank you in advance for the help.

2007-07-20 02:03:04 · 5 answers · asked by jumba 1

Math limits at infinity?

Evaluate the limit.



2. lim \/x^3-2x^2+1]/[x-1]
x-->+infinity
4. lim [\/1+\/x]/ [\/1+x]
x-->+infinity
6. lim [^3\/x^3+2] - [^3\/x^3-1]
x-->-infinity
7. lim[ x^2-1]/ [\/x^2+1]
x-->-infinity
8. lim [\/x^2-2x+3 - \/x]
x-->+infinity
10. lim [\/x^3-4x^2+1] + [\/x^2-x] +x

2007-07-20 01:29:25 · 5 answers · asked by jan 2

1) In 3 yrs., Alex will be 3 times as old as his sister Precy. A year ago, Alex was 7 times as old as Precy. How old are they now?

2) Riza was 25 when her first born son was born. Today the sum of their ages is 105. How old is Riza and her son now?

2007-07-20 01:24:14 · 4 answers · asked by Anonymous

10 , 18 , 4 , 15 , 3 , 21 , x
If x is the median of the 7 numbers listed above, what is the value of x?

Answers required asap

2007-07-20 01:14:08 · 10 answers · asked by Anonymous

(in Cubic Feet)

2007-07-20 01:00:41 · 6 answers · asked by Anonymous

btw, i'm bsc in applied math, but this question somehow always make me confuse.. ^^ thank you...

2007-07-20 00:46:37 · 10 answers · asked by de_lynx 1

what is the volume of a 5 year old boy (in Cubic Feet)

2007-07-20 00:44:38 · 11 answers · asked by Anonymous

Anna is 3 years older than Jody. Five years from now, the sum of their ages is 24. How old is each now?

2007-07-20 00:16:14 · 8 answers · asked by Anonymous