Science & Mathematics - 9 February 2007

2007-02-09 01:38:20 · 2 answers · asked by Natasha S 1 in Earth Sciences & Geology

2007-02-09 01:38:15 · 6 answers · asked by andrew s 1 in Chemistry

A string 2.50 m long has a mass of 0.00350 kg. Calculate the speed of mechanical waves in this string when it is under a tension of 0.900 N.

2007-02-09 01:36:32 · 1 answers · asked by Kana P 1 in Physics

2007-02-09 01:35:16 · 3 answers · asked by Tala 1 in Biology

my girl friend is arguing that her cousins hunt warthogs in georgia... she says that just because they are both "pigs" that they are the same thing... does that mean that a lion and a tiger are the same things?

2007-02-09 01:34:59 · 6 answers · asked by Craig G 1 in Zoology

2007-02-09 01:34:47 · 7 answers · asked by POTTSH1 1 in Mathematics

2007-02-09 01:30:35 · 6 answers · asked by keentoknow 2 in Botany

Can anybody tell how to solve math puzzles and some sites that offer some amatuer puzzles....please help me..

2007-02-09 01:30:32 · 3 answers · asked by vignesh9211 1 in Mathematics

2007-02-09 01:30:01 · 4 answers · asked by Anonymous in Earth Sciences & Geology

1: Find the area of a triangle with base 36.3" and altitude 24.3 " (round your answers when applicable)
882 sq. in
365 sq. in
404 sq. in
441 sq. in


2: Find the cost of paving a sidewalk 60 feet long and 12 feet wide at $2.00 a square yard.
$970
$160
$40
$640


3: How much larger is a square with 3-inch sides than 3 sq. in?
3 sq. in.
6 sq. in
9 sq. in
12 sq. in.


4: Which surface always has the same shape, a square foot or a foot-square?
(Look in assignment 1.4 for a hint!)
square foot
foot-square
both
neither


5: Two circles have radii of 3.5 ” and 7”. How much longer is the circumference of the second circle than that of the first?
38.47"
21.98"
36.58"
120.85"


6: .3989 + .7735 + .8206 + .4628 + .3417 =
3.1243
2.2255
2.7975
2.9432


7: The subtrahend is $16.85; the minuend is $92.00. Find the difference.
-$75.15
$75.15
$64.25
$57.85


8: A man bought 12 chairs each costing $28.50. Find the total cost.
$225.00
$267.50
$312.00
$342.00


9: The cost of operating a school for one year was $238,567. There were 2346 pupils in attendance. To the nearest dollar, what was the cost per pupil?
$98
$102
$114
$123


10: On an auto trip a car traveled 148.2 miles in 4 hr. 20 min. What was the speed in mi. per hr.?
34.2
27.6
38.8
35.7


11: A steel plate is measured to be .025 inch thick. Fifteen of these plates are put together. However, if each plate were actually .001 in. less thick than its first measurement, what would the total thickness be?
0.3075
0.325
0.34
0.36


12: 8/10 = 80%
True
False
Both
Neither


13: 13/20 = 30%
True
False
Both
Neither


14: 2/2 = 100%
True
False
Both
Neither


15: 3/5 = 40%
True
False
Both
Neither


16: Which is greater, 1/6 of $90 or 15% of $90?
1/6 of $90
15% of $90
Both
Neither


17: How many percent are there in a whole of a quantity?
1
10
50
100


18: By rounding to the nearest percent, 68 3/4 % = 68%
True
False
Both
Neither


19: By rounding to the nearest percent, .823 = 82%
True
False
Both
Neither


20: By rounding to the nearest percent, 6.3% = 6%
True
False
Both
Neither


21: A quantity is divided into 4 unequal parts. Three of the parts are 15%, 35%, and 27%. How large is the remaining part?
17%
25%
23%
35%


22: In a month of 30 days, 12 were cloudy. What percent were cloudy?
32%
40%
45%
48%


23: In a school election 640 votes were cast. The winner received 65% of the votes. How many votes did she get?
396
387
340
416


24: A chair costing $75.00 was reduced 30%. What was the new price?
$52.50
$60.10
$55.60
$22.50


25: A girl weighing 108 pounds gained 6 pounds. What percent gain was this?
7 1/5%
5.6 %
8 3/4%
6.3%


26: If you answer correctly 17 items out of 20, what percent correct answers have you given?
80%
85%
87%
90%


27: Given the base and the percent, how do you find the percentage?
Divide the base by the percent
Divide the percent by the base
Multiply the base and the percent
Multiply the base by the reciprocal of the percent


28: Given the base and the percentage, how do you find the rate?
Divide the percentage by the base
Divide the base by the percentage
Multiply the base and percentage.
Take the square root of the percentage.


29: Given the percent(rate) and the percentage, how do you find the base?
Divide the percent(rate) by the percentage
Multiply the rate and the percentage
Divide the percentage by the percent(rate)
Divide the rate2 by the percentage.


30: 45 = 20% of ___
114
9
178
225


31: 45 =___ % of 120
40
37.5
32.75
0.395


32: 45% of 20 =___
900
8
9
10


33: 20% of ___= 84
420
390
16.8
335


34: A side of a square is what percent of its perimeter?
15
20
25
50


35: A cone and a cylinder have the same base and altitude. What percent of the cylinder's volume is the volume of the cone?
30%
28.75%
36%
33 1/3%


36: The attendance at a game was 9/10 adults, the rest children. There were 240 children at the game. How many in all were in attendance?
1800
2400
2200
27500


37: A baseball player makes 5 errors in 125 fielding attempts. What is his success in fielding expressed as a decimal?
0.96
9.6
96
0.04


38: If a hitter makes 39 hits in 150 times at bat, what percent of hits is that?
33 1/3%
29.5%
26%
17.5%


39: During one year a family spent 28% of its income on food. If its total food bill was $1120, what was the family income?
$4000
$5500
$4350
$5125

2007-02-09 01:28:42 · 6 answers · asked by heather N 1 in Mathematics

f(x) = x + (x-1) + (x-2) + ... + 2 + 1 + 0

for example, f(6) = 6+5+4+3+2+1+0 = 21

Also, is there a way to model easily in excel?

2007-02-09 01:28:17 · 4 answers · asked by spineminus2 3 in Mathematics

2007-02-09 01:25:11 · 6 answers · asked by m3th0dman n 2 in Mathematics

Pls think carefully!!

2007-02-09 01:23:56 · 9 answers · asked by Anonymous in Weather

2007-02-09 01:22:36 · 6 answers · asked by lipsaheart4u 1 in Biology

Why would heating a hydrated salt not always be a good method of removing water from it?

2007-02-09 01:18:55 · 3 answers · asked by John C 2 in Chemistry

2007-02-09 01:14:23 · 8 answers · asked by meowmixcows 1 in Earth Sciences & Geology

is it safe to get antibiotics from rxonlinrstore.com with out a prescription?

2007-02-09 01:13:58 · 6 answers · asked by billy boy 1 in Medicine

2007-02-09 01:12:43 · 5 answers · asked by popular_bond 2 in Biology

a. cook book, b. school backpack, c. pencil, d. button
(2) Which of these weights are the heaviest? a. 100lb, b. 200g, c. 160z, d. 25kg
(3) acloset is 3ft wide by 3ft long by 9 ft tall. What is the volume?
(4) The top of a narrow bench is 12inches wide and 3ft long. What is the area of the bench top?

2007-02-09 01:12:38 · 7 answers · asked by rosemariestewart64 1 in Engineering

2007-02-09 01:08:54 · 4 answers · asked by >() 1 in Biology

2007-02-09 01:08:00 · 4 answers · asked by mitch 1 in Geography

2007-02-09 01:07:32 · 9 answers · asked by hayden m 2 in Biology

2007-02-09 01:03:40 · 13 answers · asked by Anonymous in Physics

2007-02-09 01:03:33 · 2 answers · asked by Miss LaStrange 5 in Other - Science

2007-02-09 01:00:23 · 6 answers · asked by Jeancommunicates 7 in Earth Sciences & Geology

2007-02-09 00:59:43 · 16 answers · asked by Anonymous in Physics

What is the scientific explanation for false dawn, sometimes called pre-dawn twilight?

Thanks.

2007-02-09 00:57:46 · 1 answers · asked by Debbie Z 1 in Astronomy & Space

Tonight Saturn is supposed to be closest to Earth than ever before. They say that we are going to be able to see itwith the naked eye. How will I be able to pick it out of the sky? And do'nt tell me look for the rings.

2007-02-09 00:57:29 · 5 answers · asked by Kelz 3 in Astronomy & Space

please answer significantly.

2007-02-09 00:56:58 · 9 answers · asked by satwik 2 in Biology

make what and other tools by early man.?

2007-02-09 00:54:11 · 2 answers · asked by Anonymous in Earth Sciences & Geology