Saturday

February 25, 2017
Total # Posts: 1,275

**geology**

Do you suppose that the geologic age of calcitic marble could be determined from its fossil content as can be done with fossiliferous limestone? My answer is yes am I correct

*January 3, 2011*

**geology**

Apart from the composition of the rock itself, what climate do you imagine is more conducive to physical weathering? and Chemical weathering? I know physical weathering is from wind and water transporting the eroded rocks and particles. Chemical weathering is water ...

*December 15, 2010*

**geometry**

what are the symmetry properties of a regular octahedron and a cube?

*December 15, 2010*

**math**

what are the different axes of rotational symmetry for a pentagonal pyramid?

*December 14, 2010*

**math**

how many axes of rotational symmetry does an equilateral triangle have (it is shown in 3d style)

*December 14, 2010*

**geometry**

determine why Euler's formula continues to hold for the polyhedron formed by cutting corners off of an octahedron. a) for an octahedron V=__, F=__,E=__ b) when you slice off one corner of the octahedron, you (gain or lose)__ edges. C) therefore, the total change in V is __...

*December 13, 2010*

**geology**

If granite were melted in the laboratory, what would be the order in which its minerals would melt. The minerals inside are: most complete large crystallized mineral is X next complete small cryastallized mineral is Z next to least large crystallized mineral is Y least ...

*December 12, 2010*

**geology**

Judging from the sizes of the before-and-after craters atop Mount St. Helens, which volcani event appears to have been more explosive, the last one before 1980, or that which occured in 1980? I thought it would be the one before 1980 since that would have created the upheaval ...

*December 12, 2010*

**math**

Which quadrilaterals have a)perpendicular diagonals b)opposite angles congruent? c) two pairs of parallel sides? d) a pair of congruent, adjacent sides? My answers a)rhombus and square b)rhombus, square, and parallelogram c)parallelogram, rectangle, and square d) at first I ...

*December 7, 2010*

**math**

We have a circle that has 270 degrees listed outside the circle at the top left. Inside the circle at the bottom right side is a an angle inside the circle with a P. Find the measure of Angle P. Would this be that we take 360-270 to get the measure of Angle P?

*December 7, 2010*

**math**

Not sure how to answer this m(<1)=4x +10 and m(<7)=6x+4, what are the measures of angles 1 and 7?

*December 7, 2010*

**math**

draw a 16-mile trail map with five locations where a hiker could start at any location, walk all 16 miles, and return to the same location without walking over any trail twice. I am confused here. At first I thought I would draw the map with the stops making a house type ...

*December 7, 2010*

**algebra**

Solve for x: (-1/3)(-4+3x)=1/2

*December 3, 2010*

**9th grade**

what is it called when chemicals that influence the way that neurons communicate communicate with each other

*December 1, 2010*

**math**

Four well-defined social classes (1=low and 4=high) exist in a country. If X is a random variable giving the social class of the son of a father from social class 1, the distribution of X is as follows: we have a small chart that has son's class, X and a 1,2,3,4 next to it...

*December 1, 2010*

**math**

How many games are played in a women's soccer conference if there are eight teams and all teams play each other twice? I figured 8x7x2=112 since this is 8 teams and 7 opponents per team and playing twice am i right?

*November 30, 2010*

**math**

How many different license plates could be made if they have one or two letters followed by 1,2,or 3 digits? Reptetitions are allowed. I figured that 26 would be for 1 letter and 52 for 2 letters so (26+52) but not sure how to figure the numbers part.

*November 30, 2010*

**math**

The numbers 1-10 are placed on cards, and the cards are put in a hat. If two cards are drawn, in order, without replacement, what is the probability that one number is even and the other a prime? I know there are 4 primes-2,3,5,7 and 5 even numbers 2,4,6,8,10 not sure how to ...

*November 30, 2010*

**math**

Two cards are drawn without replacement from a deck of 52 cards. What is the probability that both are tens, if the first card was a ten?

*November 28, 2010*

**math**

Two cards are drawn without replacement from an ordinary deck of 52 cards. What is the probability that the second card is a face card, if the first card was a queen? Would this be 11/51?

*November 28, 2010*

**math**

A lottery game has balls numbered 1 through 15. If a ball is selected at random, what is the probability of selecting a ball showing an even number or the number 12? I thought the answer would be 7 even numbers and 1 for the 12 which would be 8/15 is not an option for the ...

*November 27, 2010*

**math**

A bag contains 7 red marbles, 2 blue marbles, and 1 green marble. If a marble is selected at random, what is the probability of choosing a marble that is not blue? I have seen so many different answers on this site to this question and am not sure. I thought it would be 7 red...

*November 27, 2010*

**math**

On a bar graph the average cost of renting a studio in one city in years 1994 through 1998. The graph goes from 0 to 600. Year 94 is up to 400, year 95 is up to 500, year 96 is up to 500, year 97 is up to 525, and year 98 is up to 550. By what percentage does the average price...

*November 25, 2010*

**geology**

What is the minimum age of Earth. We are given a hint of: If the age of Earth were equal to one calendar year, the 1492 arrival of Christopher Columbus in America would have occurred at five seconds to midnight Dec. 31. That confuses me even more.

*November 22, 2010*

**math**

If P(A) = 2/3, P(B) = 1/6, and P(A and B) = 0, what can you say about P(A or B)? Not sure how to answer this one.

*November 22, 2010*

**math**

What is the probability of flipping a coin two times and getting no heads? Would that be 1/2x1/2=1 so the probability is 1%?

*November 22, 2010*

**math**

a pair of dice are rolled and the sum on their upturned faces is recorded. What is the probability that the sum showing is 8, given that one die is showing a 5? Taking into consideration the numbers 1-6 on the second die wouldn't the probability be 1/6?

*November 22, 2010*

**math**

2 cards are drawn without replacement from an ordinary deck of 52 playing cards. What is the probability that both are spades if the first card drawn was a spade? I think you subtract out the first spade making the probability 12/51 since you take off the first card already ...

*November 22, 2010*

**math**

Consider a bowl containing 36 different slips of paper. Ten of the slips of paper contain one of the set of digits 0 through 9 and 26 slips contain one of the 26 letters of the alphabet. Determine the probability of drawing one slip, what is P (even number or a vowel) I have 5...

*November 22, 2010*

**math**

Consider the experiment of selecting a card from an ordinary deck of 52 playing cards and determine the probability of a red card or a card showing a 5 is drawn. I figured the red cards would be 26/52 and the 5 would be 4/52. Would I add these two together for the answer of 28...

*November 22, 2010*

**statistics**

.59

*November 21, 2010*

**geology**

How old are the oldest meteorites yet studied and what is the minimum age of Earth since Earth is at least as old as the meteorites. We know the oldest meteorites contain equal amounts of uranium 238 and lead 206. Uranium 238 has a half life of 4.5 billion years. Would that ...

*November 21, 2010*

**geology**

2 trees grew near one another and have the same growth succession but one is larger than the other. The rate of growth of a tree is based on moisture, sunlight, temperature, and nutritious soil. Which of the four factors above is the reason for the difference in their sizes? (...

*November 21, 2010*

**PHYSICS**

is this from a webwork?

*November 21, 2010*

**math**

Between a bar graph and a line graph which one is more appropriate for displaying the number of individuals of dffering ages at a picnic. We are provided the ages brackets and frequency. I say it is a bar graph since line graphs are better for over time instead of a single ...

*November 18, 2010*

**math**

A box and whisker graph showing beef hotdogs with high and low of 110-190 and meat hotdogs with high and low of 105-195 and poultry hot dogs with 85-170. This suggests that poultry dogs have fewer calories per dog than either beef or meat hotdogs. Yet, one dietician claims ...

*November 18, 2010*

**Ms. Sue please**

Ms. Sue I had asked this of you already and you said a histogram would be best but I get confused on this and when I enter it into excel it comes out wrong. The data we have is for age 1-14 death rate per 1000 is 4.6, 15-24 rate is 6.2, 25-44 rate is 16.6, 45-64 rate os 8.8 ...

*November 18, 2010*

**math**

I get confused on this. What type of chart would I use that would show the relationship between age and deaths/1000 people from car accidents. We are provided age groupings of 1-14, 15-24, 25-44, 45-64, and 65+ with this we also have the death rates for each group per 1000. I ...

*November 18, 2010*

**math**

Describe the misuse or misinterpretation of statistics that may be involved. An ad for arcbrite claims that the detergent gets clothes twice as clean. I think it is wrong because there is no proof that the clothes get twice as clean. Also no clothes can be twice as clean they ...

*November 18, 2010*

**math**

Suppose that Helen buys three items for 47 cents each, five items for 71 cents each, and two items for 1.21 each. What was the average cost of all the items she bought? Would the answer be 74 cents?

*November 18, 2010*

**physics**

2. A hockey player is skating in a straight line at 1.5 m/s. He then increases his speed to 7 m/s in 3 s. What is his average acceleration during this 3 s?

*November 18, 2010*

**math**

Which graph is more appropriate for displaying the number of individuals of differing ages at a picnic? A histogram, bar graph, or line graph? Why would it not be appropriate to use the ones not picked? I am confused... I thought it would be bar graph as the most appropriate ...

*November 17, 2010*

**math**

Please explain how you would use a mathematical property to make the following number sentence always true: a x 9 = a x 7 + 2

*November 14, 2010*

**math**

A full container holds 5/8 of a gallon of liquid. If the container is 4/5 full, how much liquid is in the conatainer? And the answer must be explained using words.

*November 14, 2010*

**math 050**

you have to do the reciprocal of the second fraction, so it would be 5/4 and then multiply both fractions together. But don't forget to simplify if possible. :)

*November 12, 2010*

**math 050**

The second number, 2, is also a fraction, 2/1. You must then take the reciprocal of the second fraction and multiply both fractions together. Do not forget to simplify if possible.

*November 12, 2010*

**math 050**

Find a common denominator. It would be six and multiply both the numerator and the denominators by the # that will equal 6. then add.

*November 12, 2010*

**Englis**

Please give feedback on the following essay which is supposed to say if I agree or disagree that the pure in heart need no lawyers... Brandi Lubrano Torti English Period 2 2 November 2010 The Pure in Heart In Act III of the Crucible, Danforth states, “the Pure in heart ...

*November 11, 2010*

**math**

An 8 ounce bottle of hairspray costs $3.66. Find the unit price in cents per ounce. would it be 0.4575 or 45.75 cents per ounce?

*November 9, 2010*

**math**

write as an addition problem (-21)-42 A) (-21)-(-42) B) (-21)+42 c) (-21)+(-42) D) none of the above I thought it would be c. Is this correct?

*November 9, 2010*

**math**

would rounding 255,116 with the first 5 underlined be 260,000?

*November 9, 2010*

**math**

Write the negation of the following: Every rectangle with 4 equal sides is a square. A) No rectangle with 4 equal sides is not a square. B) Every square with 4 equal sides is not a square. C)Every rectangle with 4 equal sides is not a square D) No square with 4 equal sides is ...

*November 8, 2010*

**math**

Estimate by rounding: -to the nearest thousand: 9637+6387+662+403=17089 going to nearest thousand would make this 17000 am i right?

*November 8, 2010*

**math**

Convert the base 10 number in the indicated base. 40 to base 2 I get so confused on how to do this.

*November 8, 2010*

**math**

Base 10 gets me so confused. How to convert 40 to base 2

*November 8, 2010*

**Chem**

weight of 1 gallon of hydrochloric acid

*November 7, 2010*

**math**

Stephen said that the ratio of his mortgage to the sales price of his house is 7 to 6. Is this reasonable? Explain your answer. I said yes it is reasonable. Stephen would pay 7 dollars for every 6 he borrowed. We don't know the sales price or how long the mortgage is and ...

*November 4, 2010*

**math**

A 6 pack of 4oz. containers of yogurt costs $2.99. What is the unit price in cents per ounce? Round to the nearest hundredth of a cent. I multiplied 6x4=24 then did 2.99/24=.1245833 then since needed to round to the nearest hundredth of a cent I came up with 0.1246 is this right?

*November 4, 2010*

**math**

an equivalent fraction to the fraction -6/54 would be a) -12/60 b) -7/72 c) -5/45 d) -1/10 would the answer be c?

*November 4, 2010*

**English**

Crucible (Again). The sites did not help. I had done a search already. Thanks anyway for the suggestion. Would you be able to give me input on the below Intro, and also help me next with a topic sentence. "The pure in heart need no lawyers(Crucible, Arthur Miller)as ...

*November 3, 2010*

**English**

In the crucible the pure in heart need no lawyers, agree or disagree, give me some input please!

*November 3, 2010*

**math**

If a person makes $30,000 in 2004 and the inflation rate is 4% annually, how much is this salary worth in the year 2008 (in terms of 2004 dollars)? What I have is 2004=30000 2005=30000x1.04=32448 then continuing through the years to 2008=35095.76 30000/35095.76x30000=25644.12 ...

*November 2, 2010*

**math**

x/3 = x+10/6

*November 2, 2010*

**chemistry**

ht is heat

*November 2, 2010*

**chemistry**

Is there a reaction? 2 NaNO3 + ht →

*November 2, 2010*

**chem**

Can I2 oxidize metallic aluminum? Show the balanced chemical equation and the Eo values.

*October 31, 2010*

**chem**

Can I2 oxidize metallic aluminum? Show the balanced chemical equation and the Eo values.

*October 31, 2010*

**math**

A tangram is a geometric puzzle made from seven pieces that form a square. Trace the pieces, cut them out, and answer the following questions. The puzzle can also be seen on wikipedia web site. a. If the area of the entire square equals 1 unit, label each piece with its ...

*October 28, 2010*

**math**

what are the possible advantages and disadvantages of using least common denominator when adding and subtracting fractions?

*October 27, 2010*

**math-ms sue please**

Ms Sue thank you for the help with my other word problem can you check this one for me? Write a word problem and find the solution to the equation. 1/2-2/3 THe answer is -1/6 and the word problem I created is: Janet put 6 suckers on a table. 3 suckers were watermelon and 3 ...

*October 27, 2010*

**math**

for the following equations, write a word problem draw a picture, and find the solution to the equation. 5/12 - 1/3=? I know the answer is 1/12 but am stumped on how to write the word problem and draw a picture

*October 27, 2010*

**math**

find each quotient. 3/4 divided by -12

*October 26, 2010*

**math**

Use common denominators to compare the pairs of rational numbers. In each of the following identify which one is greater and explain how you know. 5/7, 5/8

*October 26, 2010*

**physics**

two student walk in the same direction along a straight path, at a constant speed one at 0.90m/s and the other at 1.90m/s assuming that they start at the same point and the same time, how much sooner does the faster student arrive at a destination 780m away?

*October 25, 2010*

**arithmetic**

5x + 15x =

*October 21, 2010*

**math**

Give a counterexample to show that each of the following generalizations about the set of integers {-3,-2,-1,0,1,2,3} is false. a) commutative property for subtraction b)associative property for subtraction

*October 20, 2010*

**US History**

45. all 46. all 47. C 48 C 49. A 50.D

*October 20, 2010*

**math**

Give a counterexample to show that each of the following generalizations about the set of integers {-3,-2,-1,0,1,2,3} is false. a) closure property for division b) distributive property for division over addition.

*October 20, 2010*

**math**

Give a counterexample to show that the following generalization about the set of integers is false. Closure property for division.

*October 19, 2010*

**math**

Show how to find the quotient 18 divided by (-6) by using the following: a) the idea of division as finding a missing factor. b) the procedures for integer division.

*October 19, 2010*

**math**

Does absolute value n+m= absolute value n + absolute value m for all integers n and m? If so give examples if not give a counterexample.

*October 18, 2010*

**art**

Looking on the national gallery of art website (or it can be seen by typing the name of the painting in any search box) review The Emperor Napoleon in His Study at the Tuileries by Jacques Louis David.Discuss the painting techniques and formal elements. I am confused on this. ...

*October 17, 2010*

**math**

You can use the prime factorization of a number, written as the product of powers of prime numbers, to find the number of factors the number has. First, express the number as a product of powers of prime numbers; for example, 36=2^2 3^2 (that is 2 squared and 3 squared)Then ...

*October 15, 2010*

**math**

Decide if the statement is true or false, tell why. 24 is a factor of 8

*October 14, 2010*

**math**

The product of two numbers is 180. The LCM of the two numbers is 60. What is the GCF of the two numbers? How do you know?

*October 12, 2010*

**math**

fill in the missing digits in as many ways as possible so the number will be divisible by 6. 3_2_ I am confused on this.

*October 11, 2010*

**math**

The following conjectures were made by students. Are they true or false? Give a counterexample if possible. Only half of the nonzero even numbers up to 100 are divisible by 4. My answer is that it is true. A number is divisible by 8 if it is divisible by 4 and divisible by 2. ...

*October 10, 2010*

**math**

The statement is If a number is divisible by 2 and by 3, then it is divisible by 6 and vice versa. Is this statement true? Give an example or counterexample. I believe it is true but am stuck on the counterexample/example.

*October 8, 2010*

**MATH**

evaluate the numerical expression. you may use a calculator, being sure to follow the order of operations. Round the answer to the nearest whole number. 129+ 17*35/14 the 129 is separate from the fraction

*October 8, 2010*

**math**

Statement: If a number is divisible by 2 and by 3, then it is divisible by 6 and vice versa. Is this statement true? Give an example or counter example.

*October 7, 2010*

**physics**

Final speed = Vi + a(t) Displacement = Vi(t) + 1/2a(t)^2

*October 3, 2010*

**math**

Name the property that justifies each step. [(2 * 100) + (3 * 10)]+ [(1 * 100) + (5 * 10)] = (2 * 100) + [(3 * 10)+ (1 * 100)] + (5 * 10)__________ property = (2 * 100) + [(1 * 100)+ (3 * 10)] + (5 * 10)___________ property = [(2 * 100) + (1 * 100)]+ [(3 * 10) + (5 * 10)]...

*October 3, 2010*

**algebra**

a. The sales representative informs you that there are 64 houses for sale with two floor plans still available. Use x to represent floor plan one and y to represent floor plan two. Write an equation that illustrates the situation.

*September 25, 2010*

**math-Ms. Sue**

ms Sue I was not sure how to do a response to you but my prior question was the following and you had answered to take the total number of students and make this the denominator and the history majors the numerator which I did and makes this 300/1225 so then to get the ratio ...

*September 24, 2010*

**math**

Ms. Sue- I have the total number of students is 1225 so then the answer would be 300/1225

*September 24, 2010*

**math**

the bar and graph shows the number of students by major in the college of arts and sciences. What is the ratio of history majors to the total number of students in the college? Math-200 history-300 english-400 science-150 other- 175

*September 24, 2010*

**math**

find the representation of the number 256 in base six

*September 24, 2010*