# Posts by a

Total # Posts: 955

**college physics**

If the amplitude of a sound wave is tripled, A.) by what factor will the intensity increase? B.) by how many dB will the sound level increase?

**calculus**

A small aircraft, on a heading of 225 degrees, is cruising at 150 km/h. It is encountering a wind blowing from a bearing of 315 degrees at 35 km/h. Determine the aircraft's ground velocity.

**Finance**

Alphonse Inc. is thinking about investing in an annuity contract that will return $100,000 annually at the end of each year for 15 years. What amount should Alphonse pay for this investment if it earns an 6% return?

**French**

Last proofread for the semester! The topic: "Imaginez que vous avez une machine a voyager dans le temps. A quel moment du passe voulez-vous revenir, et a quel moment du futur voulez-vous aller?" You will have to divide this compo into 2 parts: one will be written in ...

**French**

Thank you so much! You have been so helpful.

**French**

Can you proofread this French homework for me? Dans le film “Les sous-doués,” la majorité des personnages ont des traits qui sont sympathiques et des traits antipathiques. Mais deux personnages ont des traits qui sont plus extrêmes ou plus forts, ...

**world geography**

blah

**French**

Thank you very much!

**French**

Can someone proofread this? Here is a paragraph about the poem "L'horloge." My professor grades very strictly for conjugation/agreement, spelling, gender and using the correct word. Any help would be great, thanks! ! A mon avis, le poeme "L'hologe" ...

**math**

Evaluate: sec4ð/3

**chemistry**

8.3m KBr with a density of 1.22g/mL

**math**

someones trying to find the answer to the weekly challenge... I was hoping someone had provided the answer :)

**AP Chemistry**

The metal and water come to the same temperature at 32.5 degrees cesius how do you do this part

**O Chem**

whats the mech for this: (E)-2,5-dimethyl-hex-3-ene and bromine

**O Chem**

List other oxidizing reagents that could be used to convert the 9-fluorenol to 9- fluorenone

**algebra**

-6x>1/13

**algebra**

here is a tough one for me simplify -6[93-(-95-18)]= help please

**algebra**

solve by the elimination method 3x+4y=3 6x+8y=6 help please

**algebra**

lol i never looked at it that way ty

**algebra**

is 7 less than or greater than -12

**math**

I am a mom and I can't remember how to do this... 3 and 2 over 9 minus 1 and 1 over 3 equals p minus 5 and 1 over 2?? ahhhh help me help my daughter please.

**algebra**

Im not good at algebra so i don't know what to do?

**algebra**

ok heres another i don't get 3/4 (3x-1/2)-2/3<1/3

**algebra**

41-(2x+4) <2(x+1)+x the < has a line under it i didt know how to do that on here so help me please

**chemistry**

What volume of a 2.90 M KI stock solution would you use to make 0.425 L of a 1.25 M KI solution?

**chemistry**

A liter of 8 M NaOH solution contains how many grams of NaOH?

**Chem**

If 0.333 g Al is reacted with .501 g I2 according to the balanced chemical reaction: 2Al + 3I2 2AlI3 a) what is the limiting reagent b) how much excess reagent left over?

**Chem Very Urgent**

don't round the answers so early, and you will see that one of them is the limiting reactant

**algebra**

find the slope and the y-intercept of the line. write fractional answer in the lowest terms. 4y+9x+3=11+9x the slope is? the y-intercept is (0,? help im not to good at algebra

**biology**

what is the difference between a cyclin and a growth factor? thanks

**AP Chemistry**

I is 1. This is a covalent molecule

**chem**

Determine the number of moles of MgO that form from the reaction of 4.4 moles of O2 in the following unbalanced reaction: Mg(s) + O2(g) → MgO(s)

**chemistry**

How many milliliters of dirt are there in a hole that has a volume of 51 liter? How many mL of air

**Physic**

I= I0*10^(L(i)/10) so.. I(stage)= 10^-12*10^(110dB/10)=.1 I(2)/I(1)=r(1)^2/r(2)^2 I(2)/.1=1^2/30^2, I(2)=.1/(30^2)=1.04*10^-4 W/m^2 Area of the ear= piD^2/4= 3.14* .0084^2/4=55.4e-9m^2 P=I*A= 1.04e-4*55.4e-9= 6.16e-9 E=P*t = 6.16e-9*1= 6.16e-9

**math**

teehee

**algebra**

simplfy 7[-93-(98-32)]= help

**algebra**

is (8,9) the solution of 2x+4y=6

**algebra**

2x+3y=1 4x+6y=2 is there a order pair here or is there no solution

**physics**

a) f=-kx f=>11.6*(-9.8)=-399.0x solve for x x=0.285m

**physics**

A roller coaster ride includes a circular loop with radius R = 13.1 m. What minimum speed must the car have at the top to stay in contact with the tracks? Which equation is used here? I'm using a = v^2 / r and taking a = 9.8

**History**

why did the french and spanish start fighting

**biology**

what is the powerhouse of a cell & site of ATP production? what supports the shape of the entire cell what is involved in muscle contraction in larger organisms

**government**

Post a caricature of a politician and what was stretched of the person. Why were those features chosen?

**Physics**

Let D1 = distance of the fence post from where the turtle started D2 = distance of the fence post to the pine tree = 10 m (given) Working formula is (V2)^2 - (V1)^2 = 2a(D2) where V2 = velocity upon passing the pine tree = 1.2 m/sec. V1 = velocity upon passing the fence post a...

**algebra**

9x^2-43x-10=0 solve by factoring

**11th grade u.s. history**

can i ask one more question srry um do you know a political cartoon that goes with the 12th amendment and what does he mean how does one go about amending the constitution lol srry that's 2

**11th grade u.s. history**

Thank you so much i think i have everything your the awesomest person right now

**11th grade u.s. history**

The examples are the 1796 and 1800 election

**11th grade u.s. history**

So basically the 12th amendment is necessary cause it helps select both president and vice president So does it protect the 20th amendment or am i like way off

**11th grade u.s. history**

Im doing a project on the 12th amendment but im having a hard time finding the questions ive been working this for like well dis will be my 5th day working on it im not good at finding stuff on the internet anyway i have to find out why was the 12th amendment necessary,what ...

**Spanish**

some miles ingleseas and cuardradas of heirba luxurious And... This is a festival of diversion; therefore they come and they participate in the diversion. Thanks! this is what i got

**Grade 8 math urgent**

1/12

**math**

$900?

**math**

An A-frame cabin has a triangular front with a base of 30 ft and a height of 20 ft. If the front is to be glass that costs $3 per square foot, what will the glass cost? $1,800?

**math**

$23.55? or would i take the 2.5^2 and multiply it getting 5 then multiply that by 3.14 which is 15.7 multiplied by 3 equals 47.10

**math**

A circular coffee table has a diameter of 5 ft. What will it cost to have the top refinished if the company charges $3 per square foot for the refinishing? $15.00?

**math**

23.55?

**math**

its a circle with a dot in the middle and one line from the middle to the outside and inside the circle it says 3.75

**math**

Find the circumference of each figure. Use 3.14 for p and round your answer to one decimal place. i have a circle that is 3.75ft A~23.6 or 24?

**math**

67.28?

**math**

Add thirty-eight and nine tenths, five and fifty-eight hundredths, seven, and fifteen and eight tenths. A~1662?

**science**

How can you tell if something is alive?

**Geology**

thank u ms. sue!

**Geology**

thank you very much..... this is how i explained the process of the boiling water which is basiclly a easy version of Convection inside Earth drives the lithospheric plates on the surface. what do you think? As you have seen in the hot water animation the hottest water is at ...

**Geology**

as for the two figuers i wrote: A meteorologist named Alfred Wegener began to tell the world in 1912 about a hypothesis he called continental drift. According to this theory all continents began as one super continent he called “Pangaea”. His hypothesis explained and...

**Geology**

this is what my taecher wants...... 1. Discuss two historical individuals that contributed to the theory of plate tectonics. 2. Discuss how the boiling pot of water animation is a small scale model of the convection that takes place under the Earth's crust - need some good...

**Geology**

Respond to the following scenario: o Your younger brother is in 5th grade. He comes home and tells you to look at an animation his teacher showed him in geology class. o Review the Continents of the Past animation on this week¡¦s aXcess page. o After viewing the ...

**math**

Find the least common denominator (LCD) for fractions with the given denominators 13/15 - 11/20=2/5?

**math**

i thought i was adding...i do not understand what u are saying about 60? above the fractions i wrote this is what it says... Find the least common denominator (LCD) for fractions with the given denominators not the multiply..sorry

**math**

1/3+5/12+4/5=10/20 the least common multiply is 2/4?

**math**

how would i find the least common multiply of 12,20,35? i had 2 till i divided it by 25 and it did not work

**geometry**

i have a triangle and i have to find the primeter....here are the measurements...3/8...3/8..3/8 on each side. 3/8+3/8+3/8=9/8?

**math**

13/18 + 11/18 then write all answers in the lowest terms? A-3/2?

**Math 115**

1 1/8?

**Math 115**

9/11 - 3/11 + 7/11= 1/11? write in lowest terms

**Math 115**

13/18 + 11/18 then write all answers in the lowest terms? A-8/9?

**MATH**

Complete the statement using the given property. 6 x (4 x 7) = Associative property of multiplication then the answer would be (6x4)x7=168?

**MATH**

What is 7/8 of10/14 Answer 5/8 ?

**MATH**

72/8-9/3=6?

**MATH**

Complete the statement using the given property. 6 x (4 x 7) = Associative property of multiplication then the answer would be (6x4)x7=168?

**MATH**

just wanted to check a few more questions... 1. Find the prime factorization of the number 20. Answer- 2x2x5 2. Find the greatest common factor of 30, 45, and 50. Answer -5 3. Complete the statement using the given property. 6 x (4 x 7) = Associative property of multiplication...

**MATH**

Estimate the result in the following division problem. (Remember to round divisors to the nearest ten and dividends to the nearest hundred.) 612 divided by 32 Answer being 19?

**MATH**

just want to check my work on a few things.... 1. Tile for a kitchen counter will cost $8 per square foot to install. If the counter measures 14 ft by 3 ft, what will the tile cost? Answer-336 2. Estimate the result in the following division problem. (Remember to round ...

**MATH**

Complete the statement. 7,000,000 ps = __________ us

**MATH**

i WANTED TO CHECK MY WORK THE QUESTION IS DIVIDE 4 1/5 BY 14 AND WRITE ITS SIMPLLET FORM...I THOUGHT THE ANSWER WAS 58 4/5

**math**

513/561?

**MATH**

find the reciprocal of 17/20? How would i work this problem?

**MATH**

the length of a rectangle is 7/8yd, and its with is 32/49yd what is its areain square yards?

**Physics**

A car travels east at 82 km/h for 1.5 h. It then travels 30.0° east of north at 113 km/h for 1.6 h. What is the average velocity for the trip? (Magnitude and Direction)

**algebra**

Yes

**economics**

no

**AP EURO**

A

**ks3 history**

when did the british slave trade end? was it 1807 march 25th thanks

**Chemistry**

In a gaseous system at equilibrium with its surroundings, as molecules of A(g) collide with molecules of B(g) without reacting, the total energy of the gaseious system 1. decreases 2. increases 3. remains the same

**Chemistry**

_Mg(C103)2(s) -> _MgCl2(s)+_02(g) What is the coefficient of 02 when the equation is balanced correctly using the smallest whole-number coefficients?

**Plz -- Chem Help**

Posted by Rushi on Sunday, March 15, 2009 at 3:35pm. Question.. Nicotinic acid (niacin) is a monoprotic acid with the formula HC6H4NO2. A solution that is 0.012M in the nicotinic acid has a pH of 3.39 at 25C. what is the acid-ionization constant, Ka and pKa for this acid at ...

**math**

there are 4 cows and 8 ducks because if you - 32-24=8 and 8 divided by 2 = 4 cows so my answer is 4 cows and 8 ducks

**Science**

My friend said you just say what the particles are like if they are tight together like solid or far apart like gas

**Business**

What is market size? How to calculate it? Thanks!

**Poem**

A Good Poem$lovly I Don't No Wath I say