Which of the following is a mixture?
A. carbon dioxide
B. silicon
C. silicon dioxide
D. sand

D. Sand is a mixture of many different particles.

arkelfarkel|Points 42|

koaley|Points 6262|

Caprisun|Points 849|

Mayang30|Points 746|

rdsa77|Points 8703|

sipichapie|Points 4794|

jcr.2008|Points 840|

Expert answered|uxiali|Points 1431|

Question

Asked 3/22/2013 3:20:27 PM

0 Answers/Comments

Rating

There are no new answers.

Perform the modular arithmetic operation.
[(5 - 9) · 3] (mod 5)
A. 1
B. 2
C. 0
D. 3
**Weegy:** answer is D. 3!
**User:** Perform the modular arithmetic operation.
-12 (mod 5)
A. 1
B. 2
C. 0
D. 3
**Weegy:** 2w - 2 = -12,
2w=-10,
w=-5 **User:** Use the simple interest formula to find the missing value. Rates are annual rates. Assume 360 days per year and 30 days per month.
p = ?, r = 4.5%, t = 10 days, i = $26.68
A. p = $21,344.00
B. p = $711.47
C. p = $7114.67
D. p = $21,670.09
**Weegy:** The answer is A. p = $21,344.0 The formula is 26.68 * 36) / 0.045 = 21 344 **User:** Write as a decimal. 249.4%
A. 24.94
B. 24,940
C. 249.4
D. 2.494
**Weegy:** 249.4% = D.2.494 **User:** Solve the problem. Where appropriate, round to the nearest tenth of a percent. The price of a printer was reduced from $400 to $180. What was the percent decrease?
A. 60%
B. 122.2%
C. 45%
D. 55%
**Weegy:** The price decrease is 70%. **User:** Use a day counting table to find the exact number of days from the first date to the second date. Assume the year is not a leap year unless otherwise indicated. January 15 to July 31 (a leap year)
A. 197
B. 198
C. 213
D. 196
**Weegy:** b **User:** Use the sinking fund formula to determine the payment needed to reach the accumulated amount. Round the answer to the nearest cent. Annual payments with 5% interest compounded annually for 8 years to accumulate $6000
A. $736.92
B. $544.14
C. $628.33
D. $203.05
**Weegy:** c **User:** Solve the problem. Round to the nearest hundredth.45% of what number is 81?
A. 180.00
B. 56.00
C. 1800.00
D. 0.56
(More)

Question

Not Answered

Updated 307 days ago|9/1/2014 2:21:51 AM

1 Answer/Comment

Three noncollinear points determine a triangle. How many triangles can be formed with 8 points, no three of which are collinear?
A. 56
B. 24
C. 336
D. 6720
**Weegy:** I take it that's "no three of which are collinear." I also assume that "can be formed" ought to have been 'are determined by," because any triangle is actually composed of infinite points.
This is equivalent to asking how many different [ combinations of 3 points we can select from the 8 possibilities, because each combination determines a different triangle.
C(8,3) = 8! / (5! 3!) = 8*7*6 / (3*2*1) = 56 triangles. ] **User:** If 5 apples in a barrel of 25 apples are rotten, what is the expected number of rotten apples in a sample of 2 apples?
A. 0.4
B. 1
C. 0.63
D. 0.33
**Weegy:** The answer is: Given the initial condition, the probability of an apple being rotten is 5/25 or 1/5, so 1/5*2=2/5, but of course you can not have 2/5 of a rotten apple, so you should round up to 1 apple. **User:** Find the probability. A die is rolled 20 times and the number of twos that come up is tallied. Find the probability of getting exactly five twos.
A. 0.129
B. 0.921
C. 0.003
D. 0.083
**Weegy:** The answer is A. 0.129. The formula is: P(Five 2s) = (20C5) [(1/6)^5] [(5/6)^15] = 15504*0.000128601*0.064905472 = 0.129410292 **User:** How many ways can the letters in the word "WISCONSIN" be arranged?
A. 38,572
B. 45,360
C. 69,620
D. 362,880
**Weegy:** The answer is B. 45,360 The formula is 9 letters
i repeats twice
n repeats twice
s repeats twice **User:** A die is rolled 20 times and the number of twos that come up is tallied. Find the probability of getting exactly four twos.
A. 0.202
B. 0.075
C. 0.101
D. 0.083
**Weegy:** 0.202 is the final answer. It's A. **User:** How would you find the empirical probability of getting a red card, if you are choosing a card from an ordinary deck of 52 cards?
A. Choose a card from a deck of 52 cards many times and then find the relative frequency of red cards. This would be done by dividing the number of times a red card has occurred by the total number of times a card ... (More)

Question

Expert Answered

Asked 3/18/2013 3:57:39 PM

0 Answers/Comments

Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability. The second marble is white given the first marble is blue.
**Weegy:** First marble is white:
3/(1+3+2+2)=3/8
For the second to be blue:
1/(1+3+2+2-1)=1/7 **User:** How would you find the empirical probability of getting a red card, if you are choosing a card from an ordinary deck of 52 cards?
A. Choose a card from a deck of 52 cards many times and then find the relative frequency of red cards. This would be done by dividing the number of times a red card has occurred by the total number of times a card was chosen.
B. Choose a card from a deck of 52 cards 2 times and then find the relative frequency of red cards. This would be done by dividing the number of times a red card has occurred by 2.
C. The empirical probability cannot be determined.
D. Choose a card from a deck of 52 cards 52 times and then find the relative frequency of red cards. This would be done by dividing the number of times a red card has occurred by 52.
**Weegy:** D. Choose a card from a deck of 52 cards 52 times and then find the relative frequency of red cards. This would be done by dividing the number of times a red card has occurred by 52.
**User:** If 5 apples in a barrel of 25 apples are rotten, what is the expected number of rotten apples in a sample of 2 apples?
A. 0.4
B. 1
C. 0.63
D. 0.33
**Weegy:** C. 0.63 **User:** Find the probability.
A lottery game has balls numbered 0 through 9. What is the probability of selecting an even numbered ball or a 5?
A. 5
B. 3/5
C. 2
D. 2/5
**Weegy:** B. 3/5 (More)

Question

Expert Answered

Asked 3/18/2013 4:37:46 PM

0 Answers/Comments

A single die is rolled one time. Find the probability of rolling an odd number or a number less than 3.
**Weegy:** 1/3 (More)

Question

Expert Answered

Asked 3/18/2013 4:58:47 PM

0 Answers/Comments

Find the apportionment asked for. A small country consists of 7 provinces with the following populations: province a has 25312, province b has 19734, province c has 33407, province d has 19591, province e has 13288, province f has 22751, province g has 31992.
There are 300 federal judges to be apportioned according to the population of each province. Find the apportionment for province G using Webster's method.
A. 54
B. 55
C. 56
D. 53
**Weegy:** The answer is D. 53. **User:** Find the standard divisor for the given situation. Round your answer to two decimals. A small city has 50 police officers to be apportioned among 8 precincts based on the population of each precinct. The populations are given in the following table.
precinct 1 has 2115, precinct 2 has3659 , precinct 3 has 3117, precinct 4 has 1833, precinct 5 has 4912, precinct 6 has4027 , precinct 7 has 2776, precinct 8 has 3176.A. 513.26
B. 415.02
C. 543.84
D. 611.5
**Weegy:** B. 7.79 (More)

Question

Expert Answered

Asked 3/19/2013 12:57:59 PM

0 Answers/Comments

21,555,915 questions answered

There are no comments.