Friday

July 31, 2015

July 31, 2015

Total # Posts: 1,235

**Physics**

The last stage in the fusion of hydrogen to form helium in the Sun involves the formation of an alpha particle (4He) from two 3He nuclei: 3He + 3He 4He + p + p The binding energy for 3He is 2.57 MeV per nucleon and that for 4He is 7.07 MeV per nucleon. Calculate the amount of ...
*June 20, 2009*

**Math**

Study the number pattern in the table below and complete 2^3 (0x3^2)+(3x2)+2 8 3^3 (1x4^2)+(3x3)+2 27 4^3 (2x5^2)+ (3x4)+2 64 5^3(3x6^2)+(3x5)+2 125 6^3 ? ? ? ? ? ? ? ? ? 10^3 ? ? ? Is the pattern 6^3 (4x7^2)+(3x6)+2 216 7^3 (5x8^2)+ (3x7)+2 343 8^3 (6x9^2)+ (3x8)+2 512 9^3 (...
*June 19, 2009*

**math**

There are 7 men on a bus. Each has 7 backpacks. Each backpack has 7 cats, each nursing 7 kittens, all on the bus. How many legs are on the bus? (This is not a trick question. The driver has stepped off to use the facilities; the cats should have. All animals and humans have ...
*June 19, 2009*

**Mathematics**

Study the number pattern in the table below and complete 2^3 (0x3^2)+(3x2)+2 8 3^3 (1x4^2)+(3x3)+2 27 4^3 (2x5^2)+ (3x4)+2 64 5^3(3x6^2)+(3x5)+2 125 6^3 ? ? ? ? ? ? ? ? ? 10^3 ? ? ? n^3 (n-2)x( )^2)+(3x )+2 n^3
*June 19, 2009*

**Math**

In ABC, angle C is a right angle. AC=15 and BC=13. Find the measure of angle B. Round answer to nearest tenth. I need to know what you're supposed to enter in a graphing calculator to get this.
*June 19, 2009*

**Math**

This rectangle represents a tabletop. Its measured length is 48.5 ft, and its measured width is 36.5 ft.The relative error of these measured dimensions is 0.04. What is the relative error when computing the area of the tabletop? a. 0.0082 b. 0.082 c. 0.82 d. 8.2 I think the ...
*June 16, 2009*

**Science**

Approximately what percentage of the estimated age of Earth does the Cenozoic Era represent and how do you know? look at pg. 9 in Earth Science Reference Tables? a. 1.4% b. 5.0% c. 11.9% d. 65.0%
*June 15, 2009*

**Science**

When 1 gram of liquid water at 0 degrees Celsius freezes to form ice, how many total calories of heat are lost by the water and how do you know? a. 1 b. 0.5 c. 80 d. 540
*June 15, 2009*

**Science**

What is different about the appearence of rocks with mineral alignment and rocks with banding?
*June 15, 2009*

**Math**

The formula N = 10(4') gives N, the number of bacteria present in a culture after t hours. How many hours does it take for the number of bacteria to grow to 2,560? a. 2 hours b. 3 hours c. 4 hours d. 5 hours The answer is c., but is there another way to find this answer ...
*June 14, 2009*

**Math**

If four coins are flipped at once, what is the probability that exactly 3 tails will come up? a. 1/16 b. 1/8 c. 1/4 d. 1/2 The answer is c, but what do you do to get that?
*June 13, 2009*

**math**

y^2-6y=-7 x^2=8x-41 (4x-1)(2x+6)=3x 45-t^2=0 (3x-6)^2=33
*June 13, 2009*

**Math**

thanks
*June 10, 2009*

**Math**

A movie theater recorded the number of tickets sold daily for a popular movie during the month of June. A box-and-whisker plot represents the number of tickets sold. minimum-100 maximum-8 1st quartile-300 median-400 3rd quartile-600 Which conclusion can be made using this plot...
*June 10, 2009*

**Math**

Do you have to reduce fractions to simplest from when finding probability, or can you just leave it?
*June 9, 2009*

**Math**

But in this part, "It says 110 take M and T, but we have already placed 20 of those 110, that leaves 90 to go into the region covered by M and S but NOT by T." why can't you put it in M and T, when that was what 110 is for?
*June 9, 2009*

**Math**

thank you!
*June 9, 2009*

**Math**

In a class of 550 students, students may take all, none, or a combination of courses as follows.? Draw a Venn diagram to find how many students are not in any of these courses. Mathematics-280 Science-200 Technology-230 Mathematics and Technology-110 Science and Technology-100...
*June 9, 2009*

**French**

thanks
*June 8, 2009*

**French**

In "le maïs", what is the two dots on top of the i called in english?
*June 8, 2009*

**Syllables**

thank you
*June 7, 2009*

**Syllables**

How many syllables are in chocolate? 2 or 3?
*June 7, 2009*

**Math**

thanks
*June 4, 2009*

**Math**

Is this: T= {x|x is an integer and x ¡Ý12} in roster form T={12,13,14,15,16,17...}?
*June 4, 2009*

**Math**

thanks
*June 3, 2009*

**Math**

When you solve questions like "The sum of 3 consecutive integers is 147. Find the integers." do you find consecutive even integers and consecutive odd integers the same way?
*June 3, 2009*

**Math**

thanks
*June 3, 2009*

**Math**

What's the time difference between 8:30 AM and 12:00 noon?
*June 3, 2009*

**French**

thanks
*June 2, 2009*

**French**

Why is it that when you say "Je joue au hockey" you can't use le hockey?
*June 2, 2009*

**Science**

that means it's c, right?
*June 1, 2009*

**Science**

On June 21, where will the Sun appear to rise for an observer located in New York State? a. due west b. due east c. north of die east d. south of due east I just know it can't be a..
*June 1, 2009*

**Math**

Describe how you could find the 75th percentile score in a set of 20 scores.
*May 30, 2009*

**Math**

How do you find the percentile rank of 4.6?
*May 30, 2009*

**Math**

The prices of 7 race cars are 126,000 140,000 140,000 180,000 400,000 400,000 819,000 The mean is $315,000? the median is 180,000 which of these measures of central tendency best represents the value of the seven race cars and why??
*May 30, 2009*

**Math**

thanks
*May 29, 2009*

**Math**

Sophie measured a piece of paper to be 21.7 cm by 28.5 cm. The piece of paper is actually 21.6 cm by 28.4 cm. Determine the amount of square centimeters in the area of the piece of paper using Sophie's measurements.(I got 618.45 sq cm) Determine the number of square ...
*May 29, 2009*

**French**

In chemise and chemisier, which one is masculine and which one is feminine?
*May 27, 2009*

**French**

What's wrong with this sentence? Un "A" est meilleure q'un "F". I think there's something wrong with q'un
*May 27, 2009*

**French**

What's wrong with this sentence: "Vous maigrissez." I think there's supposed to be something before and after maigrissez.
*May 27, 2009*

**Science**

never mind, I got it..does it take a P-wave about 5 minutes 40 seconds to travel 3000 km?
*May 26, 2009*

**Science**

In the Earth Science Reference Tables (you can find them at google), on pg 11 on the bottom where there's the Earthquake Travel Time Graph, on the y-axis, what does each box equal? like for the x-axis, each box between 1 and 2, and 2 and 3 is 200 km, what what about the ...
*May 26, 2009*

**Math**

When something says that I'll be tested on formulas for perimeter and area of polygons, does that mean I'll just have to know the formulas, or that I'll have to know how to use the formulas, or both?
*May 25, 2009*

**Math**

Consider the set of integers greater than -2 and less than 6. A subset of this set is the positive factors of 5. What is the complement of this subset? a. {0,2,3,4} b. {-1,0,2,3,4} c. {-2,-1,0,2,3,4,6} d. {-2,-1,0,1,2,3,4,5,6} I think it's d, even though it's not ...
*May 25, 2009*

**Math**

thanks
*May 25, 2009*

**Math**

How do you find the answer for this: Pam is playing with red and black marbles. The number of red marbles she has is three more than twice the number of black marbles she has. She has 42 marbles in all. How many red marbles does Pam have? a. 13 b. 15 c. 29 d. 33
*May 25, 2009*

**Math**

ok
*May 25, 2009*

**Math**

How do you solve this problem: Jack brought 3 slices of cheese pizza and 4 slices of mushroom pizza for a total cost of $12.50. Grace bought 3 slices of cheese pizza and 2 slices of mushroom pizza for a total cost of $8.50. What is the cost of one slice of mushroom pizza? a. $...
*May 25, 2009*

**Math**

thanks
*May 25, 2009*

**Math**

What does it mean to solve a system of equations like y=x^2+4x-5 and y=x-1 graphically?
*May 25, 2009*

**Math**

thank you!
*May 25, 2009*

**Math**

How do you solve this question: The cost of 3 markers and 2 pencils is $1.80. The cost of 4 markers and 6 pencils is $2.90. What is the cost of each item?
*May 25, 2009*

**Math**

thanks
*May 24, 2009*

**Math**

Write an equation that represents the line that passes through the points (5,4) and (-5,0). I got y=2/5 * x is that right?
*May 24, 2009*

**Math**

how can I graph -1 ¡Ü x ¡Ü 3?
*May 24, 2009*

**Math**

I have to draw the graph of y=2^x over the interval -1¡Üx¡Ü3. I don't know what they mean by over the interval..
*May 24, 2009*

**Science**

thanks
*May 24, 2009*

**Science**

Type Earth Science Reference Tables in google, and pick the 3rd one. Then go to page 15, the top.
*May 24, 2009*

**Science**

Which star shown on the luminosity and temperature of stars graph in the Earth Science Reference Tables is currently at the Sun's final predicted stage of development, and how do you know? a. Polaris b. Procyon B c. Sirius d. Rigel
*May 24, 2009*

**Science**

thanks
*May 23, 2009*

**Science**

Is there a relationship between the time of sunrise and the daily high temperature?
*May 23, 2009*

**Math**

thanks
*May 23, 2009*

**Math**

I think that "number sold" is the dependent variable, and "average price" is the independent variable. Am I right?
*May 23, 2009*

**Math**

thanks
*May 23, 2009*

**Math**

I'm making a graph, but I can't tell which is the independent or dependent variable? they are "dollars spent" and "gallons bought". which one depends on the other?
*May 23, 2009*

**Math**

Is it possible to factor 2w-1-w^3? If so, how?
*May 21, 2009*

**Math**

thanks
*May 20, 2009*

**Math**

In this problem: -2/a+2 + 3a/2a-1 First I made the denominators alike: -2(2a-1)/(a+2)(2a-1) + 3a(a+2)/(a+2)(2a-1) = -4a+2/(a+2)(2a+1) + 3a^2+6a/(a+2)(2a-1) What I want to know is if I can eliminate the a+2 for the first fraction, on both the numerator and the denominator?
*May 20, 2009*

**Math**

Can I simplify the second fraction by dividing the numerator and denominator by 3b?
*May 20, 2009*

**Math**

In this problem: 5/12b + 15/36b^2 First I made a common denominator: 15b/36b^2 + 15/36b^2 Then I simplified the first fraction: 5/12b + 15/36b^2 Can I simplify the second fraction by 3b? If I can, what am I supposed to get?
*May 20, 2009*

**Math**

Are you sure it isn't 10b?
*May 18, 2009*

**Math**

In (8b+2b^3)/(b-1), Do you have to put a zero coefficient in it?
*May 18, 2009*

**Math**

Which ordered pair is a solution of the system of equations y=x^2-x-20 and y=3x-15? a. (-5,-30) b. (-1,-18) c. (0,5) d. (5,-1) When I solved the system of equations I got 5 and -1. What do I do next?
*May 17, 2009*

**Math**

How do you do this, I keep on getting 3.. There is a right triangle. One angle is 30 degrees. The hypotenuse is 24. What is the value of x, the adjacent, to the nearest whole number? a. 12 b. 14 c. 21 d. 28
*May 17, 2009*

**Math**

Thanks
*May 16, 2009*

**Math**

What is an equation of the line that passes through the points (3,-3) and (-3,-3)? how do you figure this out: a. y=3 b. x=-3 c. y=-3 d. x=y
*May 16, 2009*

**Math**

I used an online graphing calculator..so maybe it's different like that?
*May 16, 2009*

**Math**

thanks
*May 16, 2009*

**Math**

Suppose Triangle ABC has right angle C. Find the measures of the other sides to the nearest whole number if...? the measure of angle A is 32 degrees, and the measure of AB is 42. For one side, I got 23, and for the other side, I got 35. Am I right?
*May 16, 2009*

**Literacy**

thanks
*May 14, 2009*

**Literacy**

Does flowering and blooming rhyme?
*May 14, 2009*

**Math**

thanks
*May 14, 2009*

**Math**

How do you simplify 5-4n/4n-5?
*May 14, 2009*

**Math**

thanks
*May 14, 2009*

**Math**

How do you factor 2x^2+2x?
*May 14, 2009*

**Math**

i meant the first instance. thanks
*May 14, 2009*

**Math**

Can you simplify 15 sqrt3 / 3 into 5 sqrt 3? why or why not?
*May 14, 2009*

**French**

How do you say the country Zaire in French?
*May 13, 2009*

**Math**

Simplify - sqrt 12b^2 * 2 sqrt 8b. I got -8 sqrt 6
*May 12, 2009*

**Science**

thanks
*May 12, 2009*

**Science**

I don't know..I think it's supposed to be switched in the southern hemisphere, so december?
*May 12, 2009*

**Science**

Why is it that in late August, the amout of sea ice surrounding the continent of Antarctica approaches its greatest extent? And why is it that in February, the sea ice surrounding Anarctica is at it's minimum extent?
*May 12, 2009*

**French**

oh, I forgot all about that..thank you!
*May 12, 2009*

**French**

in this: Question: ¨¤ qui aimes-tu rendre visite? Response: J'amie rends visite ¨¤ ma cousine. So my mistake was that it was supposed to be rendre, but I don't understand why..aren't you supposed to conjugate it to rends?
*May 12, 2009*

**Math**

thanks
*May 11, 2009*

**Math**

There's a right triangle. There's an angle that measures 41 degrees. The hypotenuse is x, and the angle opposite 41 degrees measures 25 in length. How can I find what x is? The proportion set up is 25/x, but how do you solve for x?
*May 11, 2009*

**science**

is able to change shape. this requires energy
*May 11, 2009*

**Math**

50. If you take half of 50, it's 25.
*May 11, 2009*

**French**

are you sure? This question was on a quiz I took, and my teacher circled rends and took off a point..
*May 11, 2009*

**French**

No, that was a typo. I meant to say J'aime. and both question marks are a with an accent grave.
*May 11, 2009*