# Posts by ANON

Total # Posts: 2,727

**Statistic Help please**

IT IS no; no 20% CONFIRMED 100%

*March 18, 2014*

**AP Calc**

If x=e^t and y=t^2-3, then for what values of t, t>=0, is the function y=f(x) concave up?

*March 17, 2014*

**AP Calc**

The coordinates of the point on the curve cos(y)=x-y, -pi<=x<=pi, where the tangent line to the curve is a vertical line is ____.

*March 17, 2014*

**AP Calc**

The base of a solid is the region in the first quadrant bounded by the ellipse x^2/a^2 + y^2/b^2 = 1. Each cross-section perpendicular to the x-axis is an isosceles right triangle with the hypotenuse as the base. Find the volume of the solid in terms of a and b. I'm having...

*March 17, 2014*

**AP Calculus**

Approximating the integral from 0 to 6 of (e^x dx) by 3 circumscribed rectangles of equal width on the x-axis yields ____. a) 2e^2 + 4e^4 + 6e^6 b) 2(e^2 + e^4 + e^6) c) 2(e + e^3 + e^5) d) e + 3e^3 + 5e^5 e) e^2 + 3e^4 + 5e^6

*March 17, 2014*

**Math**

idiots

*March 17, 2014*

**AP Calculus**

The average area of all squares with sides between a inches and b inches (b>a) is ____ in^2.

*March 16, 2014*

**AP Calculus**

The base of a solid is bounded by y =|x|+a, 0<a<3, and the line y=3. find in cu. units in terms of a, the volume of the solid if every cross section perpendicular to the y-axis is an equilateral triangle.

*March 16, 2014*

**chem.**

given: Ea= 66.58 kj/mol=66,580 j/mol T1=298.15k K2=4.5 (K1) find: T2 solution: ln (k2/k1)= Ea/R (1/T1-1/T2) ln (4.5 k1/k1) =Ea/R ( 1/298.15k-1/T2) T2=316 K Hope that helps 👍

*March 14, 2014*

**Science 6th grade Earth's day and night ANSWERS**

Queen Elsa is right

*March 12, 2014*

**Science 6th grade Earth's day and night ANSWERS**

The answers are correct.

*March 12, 2014*

**science(check answers)**

a d b c

*March 12, 2014*

**science(check answers)**

thanks emily <3

*March 12, 2014*

**science(check answers)**

THANKS EMILY <3

*March 12, 2014*

**science**

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. Given this information, how many electrons does it have? How many protons and neutrons does this atom have?

*March 9, 2014*

**science**

A hydrogen atom has one proton, two neutrons, and no electrons. Is this atom an ion?

*March 9, 2014*

**Probability**

Anyone know answer to 2?

*March 7, 2014*

**Geometry**

In baseball, the length of the path between each pair of consecutive bases is 90 feet. The paths form right angles. How far does the ball need to travel if it is thrown from home plate directly to second base? A. 90 feet B. 127.3 feet C. 135.7 feet D. 180 feet

*March 6, 2014*

**English**

lmao wtf

*March 6, 2014*

**MATH**

I agree with tbetzz

*March 5, 2014*

**MATH**

But why would you subtract the 576 and 144. and plus to find the circumference you were supposed to times the 576 by pi and the 144 by pi

*March 5, 2014*

**Physics**

its 54.7 km/s

*March 4, 2014*

**RATIO**

dezz nuts

*March 3, 2014*

**Geometry**

A trapezoid has a perimeter of 14 feet. What will the perimeter be if each side length is increased by a factor 7? A. 21 feet B. 98 feet C. 196 feet D. 686 feet This one is def B correct?

*March 2, 2014*

**Geometry**

A rectangle has an area of 6 square meters. What will be the area of the rectangle if each side length is increased by a factor 5? A. 11 square meters B. 30 square meters C. 125 square meters D. 150 square meters I think the answer is B

*March 2, 2014*

**Geometry**

Is it D?

*March 2, 2014*

**Geometry**

A rectangular prism has a base that is 5 cm by 7 cm and a height of 12 cm. If all dimensions are doubled, what happens to the volume? A. When the dimensions are doubled, the volume is twice the original volume. B. When the dimensions are doubled, the volume is three times the ...

*March 2, 2014*

**Geometry**

A triangle is enlarged by a factor of 3. The perimeter of the new triangle is 36 feet. What could be the lengths of the sides of the original triangle? A. 3 feet, 4 feet, and 5 feet B. 1.5 feet, 1.25 foot, and 1.25 foot C. 2 feet, 0.5 feet, and 1.8 feet D. 4 feet, 4 feet, and ...

*March 2, 2014*

**Geometry**

The circumference of a circle changes from 20 to 4 after a dilation. What was the scale factor of the dilation? A. 1/25 B. 1/5 C. 5 D. 25

*March 2, 2014*

**Geometry**

A circle with a radius of 1/2 ft is dilated by a scale factor of 8. Which statements about the new circle are true? Check all that apply. A.The length of the new radius will be 4 feet. B.The length of the new radius will be 32 feet. C.The new circumference will be 8 times the ...

*March 2, 2014*

**Geometry**

What is the height of a cylinder with a volume of 384π cubic inches and a radius of 8 inches? Round to the nearest tenth of an inch.

*February 28, 2014*

**Geometry**

A cylindrical water tank has a diameter of 20 feet and a height of 15 feet. How much water is needed to fill the tank?

*February 28, 2014*

**Science**

did you ever find the answer

*February 28, 2014*

**Science**

I got 100% 1/ true 2/ D 3/ B 4/ D

*February 27, 2014*

**social studies**

wait are they actually???

*February 27, 2014*

**math- calculus**

You will often see proj (Vector a onto Vector b) written as projb⃗ a⃗ .Show that projb⃗ a⃗ =(a⃗ ⋅b⃗/ b⃗ ⋅b⃗ )*b⃗ .

*February 26, 2014*

**Physics**

a)5368 N b)5.5 s c)15.24 m d) 2.74 s

*February 24, 2014*

**Science One Question! Help ASAP!!!**

Fluttershy you're stupid. "You're" = You are. It would be Your opinion. Your Research. Don't try to act smart if you don't know the difference between you're and your.

*February 24, 2014*

**Science One Question! Help ASAP!!!**

I agree ! ^

*February 24, 2014*

**physics**

(a) A car with a mass of 950 kg is moving to the right with a constant speed of 1.45 m/s. What is the total force on the car? (b) What is the total force on the car if it is moving to the left?

*February 21, 2014*

**math**

A stairway runs up the edge of the pyramid. From bottom to top the stairway is 92 m long. The stairway makes an angle of 70° to the base edge, as shown. A line from the middle of one of the base edges to the top of the pyramid makes an angle of elevation of 52° with ...

*February 20, 2014*

**Black Death**

I have to do a powerpoint on the Black Death. Where can I find the best information to write about it?

*February 19, 2014*

**SCIENCE HELP ASAP! :)**

those answers are wrong, I got 40%. Yayy now I'm failing

*February 19, 2014*

**Geometry**

Is it B?

*February 17, 2014*

**Geometry**

How does the volume of a rectangular prism change if the width is reduced to 1/10 of its original size, the height is reduced to 1/4 of its original size, and the length is reduced to 2/3 of its original size? A. V=1/120lwh B. V=1/60lwh C. V= 2/3lwh D. V=3/4lwh

*February 17, 2014*

**MATH**

David wants to reduce a rectangular image on his computer so that the new image has 25% of the area of the original image. How should David modify the image? Justify your answer.

*February 17, 2014*

**MATH**

Drew has a rectangular postcard that is 6 inches long and 4 inches wide. He uses a photocopier to enlarge it, so that the length and width are 1.5 times as long as those of the original postcard. Explain how the perimeter and area change.

*February 17, 2014*

**Geometry**

Thank you so much oh my god

*February 17, 2014*

**Geometry**

How does the volume of a square pyramid change if the base area is quadrupled and the height is reduced to 1/9 of its original size? A. V= 1/27Bh B. V= 4/27Bh C. V= 2/9Bh D. V= 4/9Bh

*February 17, 2014*

**Geometry**

but that's not a choice. A. 1/6 B. 1/3 C. 3 D. 6

*February 17, 2014*

**Geometry**

The volume of a square pyramid is equal to _____ times the volume of a cube where the bases are the same, but the square pyramid is half the height of the cube.

*February 17, 2014*

**Geometry**

If a cylinder’s radius and height are each shrunk down to a third of the original size, what would be the formula to find the modified surface area?

*February 17, 2014*

**Calc**

Find the coordinates of the point on the curve xy=6 in quadrant I where the normal to the curve passes through the origin.

*February 16, 2014*

**calc**

The slope of the tangent to the curve y=f(x) is given by (1/9)(x^2)(y^2). The curve passes through the point (3,1). Find the value of y when x=3*cubedroot(3).

*February 16, 2014*

**Calc**

it wasn't a typo.. how did you get 10?

*February 15, 2014*

**Calc**

Let f be the function that contains the point (-1,8) and satisfies the differential equation dy/dx=10/(x^2+1) (a) Write the equation of the tangent to f at x=-1. (b) Use your equation in part a to estimate f(0). (c) We know that the integral from -1 to 0 of 10/(x^2+1) equals ...

*February 15, 2014*

**science**

Oh Baka why don't you just leave them alone, if they're "cheating" why would you make an account on here?

*February 11, 2014*

**Geometry**

Andrea has a yard shaped like parallelogram ABCD. The garden area, parallelogram EFGB, has an area of 105 ft. If Andrea wants to sod the rest of her yard, how many square feet of sod should she order? A. 765 ft B. 840 ft C. 945 ft D. 1,515 ft

*February 9, 2014*

**Math :-)**

Explain why knowing the height is needed when finding the perimeter of a right triangle.

*February 9, 2014*

**Geometry**

Maria is making a stained glass window in the form of a kite. The width of the window must be 15 in., and she only has enough stained glass to cover 60 in. What should the height of the window be? A. 4 in. B. 6 in. C. 8 in. D. 12 in.

*February 9, 2014*

**Classical mechanics**

Hi juanpro is there other classical mechanic. I might want to join too.

*February 7, 2014*

**Plz, plz help! SS**

Whats that Nicole M??

*February 5, 2014*

**english/writing**

does my thesis statement make sense? is it clear? any suggestions are welcomed In "The Love Song of J Alfred Prufrock," T.S. Eliot used Prufrock to symbolize modern man's fruitless struggle to find self-worth, love, and insecurities of owns appearance. thank you! :D

*February 4, 2014*

**biology**

"ide","ite","ate"

*February 4, 2014*

**algebra**

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ second answers should be A B D B

*February 4, 2014*

**algebra**

Some of the test on connections have different questions if your number 3 is "What is the factored form of k^2+kf-2f^2." then your answers will be A B B B if not its A B B B

*February 4, 2014*

**Business/ Computers**

Hello I'm doing a powerpoint on the history of computers for business but I just have to look for people. Do you mind giving me a website that would be perfect to find all these people? 1. Blaise Pascal 2. Wilhelm Schickard 3. Christopher Sholes 4. George Stibitz 5. ...

*February 3, 2014*

**math**

IF YOU GO TO CONNECTIONS ACADEMY AND ARE ON LESSON POLYGONS AND ANGLES THEN USE GRAY'S ANSWERS. HE IS 100% AND IF YOU DO NOT GO TO CONNECTIONS ACADEMY THEN THESE ANSWERS MAY NOT BE RELIABLE.

*February 3, 2014*

**math**

TAYLOR ISN'T RIGHT I GOT 2/11 :(

*February 3, 2014*

**math**

YOURE ALL IDIOTS GDI JUST GIVE THE ANSWERS AND GO!!!!!

*February 3, 2014*

**math**

I am a math teacher for grade 8 and you are wrong completely off. B C A B A C D C B D C

*February 3, 2014*

**math**

Kat is not right, i got 1/10. here are the correct ones 1) B 2) A 3) C 4) D 5) B 6) D 7) C 8) A 9) A 10) C 11) Essay.

*February 3, 2014*

**math**

I'm confused, is he right or wrong?

*February 3, 2014*

**Science (Chemistry)**

After submitting the answer, this is what I received as feedback. The system is marking that the amount of moles of precipitate was incorrect, although when I did the problem originally I got the same number that you did. I am just posting this feedback for future reference, ...

*February 2, 2014*

**Science (Chemistry)**

A student mixes 35.0 mL of 2.82 M Pb(NO3)2(aq) with 20.0 mL of 0.00221 M Na2C2O4(aq). How many moles of PbC2O4(s) precipitate from the resulting solution? What are the values of [Pb2 ], [C2O42–], [NO3–], and [Na ] after the solution has reached equilibrium at 25 °...

*February 2, 2014*

**Science (Chemistry)**

A student mixes 35.0 mL of 2.82 M Pb(NO3)2(aq) with 20.0 mL of 0.00221 M Na2C2O4(aq). How many moles of PbC2O4(s) precipitate from the resulting solution? What are the values of [Pb2 ], [C2O42–], [NO3–], and [Na ] after the solution has reached equilibrium at 25 °...

*February 2, 2014*

**Social Studies (Ms. Sue)**

What would you consider to be the start of the Civil Rights Movement? I'm not badgering, I'm just curious.

*February 1, 2014*

**science**

Write a balanced equation to describe the following reactions: a) C14H30 is cracked to produce ethene, hydrogen and one other compound b) C16H34 is cracked to produce ethene and propene in a 2:1 ratio and only one other compound

*February 1, 2014*

**Science**

its a

*January 30, 2014*

**math**

72 scored higher than 85% 8 scored lower

*January 30, 2014*

**science(check answers)**

Its C lol

*January 29, 2014*

**math**

The problem is how the question is worded is not physically possible to do with 1 cake and 8 EQUAL pieces. Stupid common core math is ridiculous.

*January 28, 2014*

**URGENT Physics PLEASE help**

5. A 1,600 kg car is moving south at 24 m/s. What is its momentum? (Points : 1) 66 kgm/s south 66 kgm/s north 38,000 kgm/s north 38,000 kgm/s south Question 6. 6. The velocity of a 150 kg cart changes from 6.0 m/s to 14.0 m/s. What is the magnitude of the impulse that acted on...

*January 27, 2014*

**Science**

Kiki is right

*January 24, 2014*

**Science**

Planet D. Gravity and Inertia. The Moon would move in a straight line.

*January 24, 2014*

**permutation and combination**

The game of euchre uses only the 9s, 10s, jacks, queens, kings, and aces from a standard deck of cards How many five-card hands have at least two red cards?

*January 23, 2014*

**math**

8 Quarters + 3 Dimes + 7 Nickels = 21 coins he uses 16 coins 21 - 16 = 5 he used 8 Quarters, 3 Dimes and 5 Nickels therefore he has 2 Nickels left

*January 23, 2014*

**permutations with identical items.**

how many four letter arrangements are there for the word Mattawa?

*January 23, 2014*

**math**

* :)

*January 22, 2014*

**math**

your welcome ")

*January 22, 2014*

**math**

12/12 - (3/12 + 2/12) 12/12 - 5/12 = 7/12 therefore there are 7 green marbles

*January 22, 2014*

**Data Management**

what is the probability that either a heart or a face card (K Q J) is chosen but the Q of heart is missing from the deck?

*January 22, 2014*

**Data Management**

a couple is planning to have seven children. what is the probability that at least 3 of the children will have a birthday in the same month

*January 22, 2014*

**Data Management**

if mike does homework today the probability that he will do it tomorrow is 0.8. the probability he will do it today is 0.7. what are the odds that he will do it both today and tomorrow

*January 22, 2014*

**Data Management**

there is a six sided die, number 1- to 6. what is the probability that it it take exactly two tries to roll a 4? what is the expected waiting time until and odd prime number is rolled?

*January 22, 2014*

**Physical Science**

a d d b

*January 22, 2014*

**Science**

Fuyuko is correct. D B B B

*January 21, 2014*

**Science**

All of your answers are correct except for Question 6. The answer should be B (wide, dark areas and strange spots and ridges)

*January 19, 2014*

**Spanish**

Can somebody help with my Spanish review? Combina lógicamente las palabras de vocabulario de las dos columnas. a. la caza b. el boxeo c. penalizar d. el/la jinete e. la cancha f. transnochar g. el campamento h. los naipes 1. el arco y la flecha (A) 2. la tienda de campa...

*January 17, 2014*

**Tech ed**

Lesson 1 answers acceptable use policy 1.B 2.A 3.D 100%

*January 16, 2014*