# Posts by allison

Total # Posts: 527

**chemistry**

how much 10M HNO3 must be added to 1L of a buffer that is .010M acetic acid and .10M sodium acetate to reduce the pH to 5. pKa=4.75

**chemistry**

To what volume must 481 mL of 12 M Ca(OH)2 solution be diluted to make a 2 M Ca(OH)2 solution? a)1.352L b)2.886L c)2.10833L d)none of the above

**Crime scene chemistry**

What would happen to the denisty of a plastic sample if an excessive number of air bubbles were allowed to accumulate on the plastic surface when placed into the solution?

**Spelling**

The homework question that I just posted at 7:03pm is for a kindengarden.

**Spelling**

The teacher didn't define, this is for a kindengarden class.

**Spelling**

The homework assignment is first the child has four spelling words to write five times and memorize and then the homework assignmen says make three clusters of words using fl for example fly.

**Spelling**

I'm sorry I typed the question wrong. The question is: Make three cluster words using f l

**Spelling**

What does it mean when the homework says: Make three F L cluster words example fly?

**Algebra**

composit function 2 f(x)-4g(x) if f(x)= x2+4x-1 and g(x)= 2x-4

**physics**

a car is traveling 20.0 m/s when the driver sees a child standing in the road. he takes 0.80 seconds to react, then steps on the brakes and slows at -7.0 m/s squared. how far does the car go before it stops?

**Bus Finance**

You want to purchase a home. cost $165,000. you have $40,000 downpayment. you want to finance rest at 3.5% for 15 years. how much will monthly mortgage be? How much in total will you pay over the 15 years even counting the downpayment? I came up with payment of $893.6 for ...

**Bus Finance**

so I was supposed to divide not multiply for my initial amount and then if I had used those correctly with the NOM% and EFF I should have come up with it correctly? I will try it again. I could swear in my notes he said we had to multiply. Thanks Again

**Bus Finance**

I have inherited $40,000. I want to save it for 5 years to make down payment on new home. I get info from two diff banks. Bank A - 5.78% APR with semi annual compounding. Bank B - 5.75% APR with daily compounding. Which bank would you use to maximize your return? For Bank A - ...

**Bus Finance**

to continue. it asks how much in total you will pay over the 15 years based on mortgage and down payment. I used the (893.60*12)(15)+40,000=200848.00. It then asks what portion of that is interest. I used the 200848.00FV 125000PV 180N with the I/YR=3.17%.

**Bus Finance**

You want to purchase a home. cost $165,000. you have $40,000 downpayment. you want to finance rest at 3.5% for 15 years. how much will monthly mortgage be? How much in total will you pay over the 15 years even counting the downpayment? I came up with payment of $893.6 for ...

**Business Finance**

you are saving for your child's college.. there are 15 years before they will be in college. you have saved 0 so far. Your goal is $98,000. assume annual in rate is 8%. how much must you save at the end of each year in equal amounts to reach your goal? I know that with the...

**Chemistry**

A B & C are correct D.Should say: 2F---Fsub2. Exothermic. One bond is formed F-F 0-155= -155kJ/mol.

**Physics (my last problem)**

A 3.4 kg ogject to the right at 3.5 m/s hits a stationary object of mass 2.7 kg. After the collision the 2.7 kg object moves to the right at 1.8 m/s. A) What is the final verlocity of the 3.4 kg object? B) What is the total kinetic energy og the objects before the collision? C...

**Physics -.-**

thank you soooooo much(:

**Physics -.-**

A projectile is shot horizontally at 220 m/s from the top of a 620 m high cliff. A) How long till the projectile hits the ground? B) How far from the base of the cliff does the projectile land? I am gonna be honest. I have no idea how to do any of my Physics homework. ): I ...

**AP US History**

How did the McKinley Tariff Act hurt the farmers?

**more physics ):**

A tennis player places a 51 kg ball machine on a frictionless surface, as shown below. The machine fires a 0.067 kg tennis ball horizontally with a velocity of 33.4 m/s toward the north. What is the final velocity of the machine? Can you please EXPLAIN how to get the answer?!

**physics )':**

A 66.5 kg ice skater moving to the right with a velocity of 2.80 m/s throws a 0.16 kg snowball to the right with a velocity of 20.4 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction between the skates and...

**trig (pre-cal class)**

Suppose è is an acute angle of a right triangle. For this function, find the values of the remaining five trigonometric functions of è. Round to four decimal places. sin è = 0.1 cos è = tan è = cot è = csc è = sec è =

**Geometry**

If m<DBC=10x and m<ACb=4x^2, find m<ACB. The quadrilateral ABCD is a rectangle. B ------------- C | | | | | | | | A -------------|D There are diagonal bisectors inside the rectangle but I could not draw them in. The diagonals are DB and CA and the point in the middle ...

**8th grade math**

Okay, so you have two variables, let's call them x and y. x will be the weight of the water when the tank is full, and y will be the weight of the tank. So you can get two equations from the question: .4x+y=80 (1) x+y=140 (2) and now you can do elimination by subtracting (...

**chemistry**

8.38% thank you very much

**chemistry**

What is the mass pecent of an aqueous sodium hydroxide in which the mole fraction of NaOH is 0.162? The density of the solution is 1.3311 g/ mL

**statistics**

what is the sample mean for extrinsic value by gender

**Geometry**

the measure of each exterior angle is 45. how many sides does the polygon have?

**math**

What is the principle of powers? Describe in your own words. When solving a radical equation, how do we use the principle of powers to eliminate radicals? Demonstrate with an example.

**Math**

solve: 4x^2 + 14x = 0 help me solve

**Math**

Can you show us how to find the discriminant of the quadratic x^2 + 2x -2 =0

**math**

create the equation: x=2 and x=5

**Math**

Make an equation that has solutions x= 9 and x = -2/3

**math**

Multiply ã7(ã10-ã6)

**Math**

Add simplify by collecting like radical terms if possible 3ã45+4ã180

**math**

so I would have abd answer of 4root symbol625^3

**math**

write an equivalent expression using radical notation 625 3/4 Help

**math**

add simplify by collecting like radical terms if possible assuming that all expressions under radicals represent nonnegative numbers ã2a+5ã8a^3 i have the answer as (1+10a)squareroot symbol 2a is this correct?

**math**

Subtract simplify by collecting like terms if possible 9 3ã4-3 3ã4 Would the answer be 6 3ã4

**math**

Find the following. Assume a and b can represent any real number 440ã(a+b)440 Is the answer a[b]

**math**

write an equivalent expression using radical notation 625 3/4 would this be 1/5^4 Otherwise I am lost

**math**

they are squre root symbols

**math**

Multiply (4ã6-12ã5)(2ã6+6ã5) Would the answer be 8ã64-72ã25 I donft think I am supposed to multiply the 4 and 6 or the 2 and 6

**math**

multiply ã7(ã10-ã6) so would this be ã70-ã42

**math**

rewrite with rational exponents (9ã5x^4y)^3 would this be (15x^64y^3)1/9 help

**math**

So would it be 10^11 right

**math**

Multiply and simplify by factoring ∜10,000*∜10,000,000 I get ∜100^9 I hope this is correct

**Math**

so the answer is 27 Square root symbol 2x^4

**Math**

Simplify by factoring Assume that all expressions under radicals represents non negative numbers 3square root symbol 162x8 I end up with 3x 3squareroot symbol 2x^5 I don't think this is correct help

**Math**

thank you

**Math**

Find the length of side a in the right triangle if b=12 and c=15 I have the length as 6 but I don't think this is correct Please help

**Math**

So was I correcdt

**Math**

What does it mean to refer to a 20 inch TV or a 25 inch tv set? Such ubits are refer to the diagonal of the screen. A 25 inch TV set also has a width of 20 inch what is its height? would I multiply 20 by the height to get the diagonal? I think the answer is 15 inches Please ...

**english**

Do you know what this matches and why? Primate:Primeval as Coelenterate:Medieval Deliberate:Archival Ingrate:Credible Migrate:Primal Thank you!

**math**

When you convert 1/4, you would divide 1 by 4 and get 0.25. So when dividing .39 by 250 you get... 0.00156

**Physics Honors**

An egg is thrown horizontally off the roof of SI, which is 60 meters high, with an initial velocity of 6.5 m/s. How long does it take to hit the ground? How far does it go in the x direction?

**Physics Honors**

Jason Kendall throws a baseball with a horizontal component of velocity 25 m/s. It takes 3.0 s to come back to its original height. Calculate its horizontal range, its initial vertical component of velocity and its initial angle of projection.

**Physics Honors**

How long will it take a shell fired from a cliff at an initial velocity of 800 m/s at an angle 30 degrees above the horizontal to reach the ground 150 meters below?

**Physics Honors**

A ball is kicked horizontally at 8.0 m/s from a cliff 80 meters high. How far from the base of the cliff will the stone strike the ground?

**Physics Honors**

A football is kicked with an initial velocity of 25 m/s at an angle of 45 degrees with the horizontal . Determine the time of flight, the horizontal distance, and the peak height of the long jumper.

**Physics Honors**

A soccer ball is kicked horizontally off a 22.0 meter high hill and lands a distance of 35 meters from the edge of the hill. Determine the initial horizontal velocity of the soccer ball.

**Physics Honors**

A pool ball leaves a 0.60 meter high table with an initial velocity of 2.4 m/s. Predict the time required for the pool ball to fall to the ground and the horizontal distance between the table's edge and the ball's landing location.

**Physics Honors**

A basketball is thrown horizontally from a window that is 22 meters high. If the initial velocity of the ball 18 m/s, find how long the ball takes to reach the ground and how far the ball lands from the building?

**Physics Honors**

The same rock is thrown upwards at an angle of 45 degrees. It travels 10 meters up to its maximum height. How far will it travel before it lands?

**Physics Honors**

A rock is thrown horizontally from a cliff overlooking the ocean. If the cliff is 45 meters high and the rock is thrown at 18 m/s, what is the angle at which it strikes the ocean?

**Physics Honors**

A bullet is fired from a rifle, emerging at 340 m/s. It strikes a sandbag some distance away, having lost 10% of its velocity due to air resistance. if it penetrates the sandbag to a depth of 12 meters, how long did it take for the bullet to come to rest in the bag?

**Physics Honors**

A pitcher throws a fast ball horizontally at 42.1 m/s How far does it drop before crossing the plate, 18.3 meters away?

**Physics Honors**

A bullet is fired from a rifle, emerging at 340 m/s. It strikes a sandbag some distance away, having lost 10% of its velocity due to air resistance. if it penetrates the sandbag to a depth of 12 meters, how long did it take for the bullet to come to rest in the bag?

**U.S History**

Iroquois

**language**

how has workng together changed history?

**OChem**

john tsai you're a chink dont think that i don't know you

**OChem**

Typo: What intermolecular forces are important in the binding of molecules to the ADSORBENT in ADSORPTION chromatography?

**OChem**

What intermolecular forces are important in the binding of organic molecules to the absorbent in absorption chromatogrpahy? Select all that apply. A) London forces B) Van der Waals forces C) Covalent Bonding D) Hydrogen bonding E) Dipole-dipole interactions F) Lewis acid-base ...

**chemistry**

A laboratory has a 2.0-mol sample of pure selenium and a 2.0-mol sample of pure chromium. How many more grams of selenium than chromium does this represent?

**Physical Science**

Can someone please help me with this question Im not really sure what the question is asking, I don't understand at all. Please explain. With sound, you get harmony when the frequencies of two sounds are in the ratios of small integers - eg, two sounds with one frequency ...

**science**

The sun shines down on a mirror. The angle between the incident rays of sunlight and the vertical is 60o. What is the angle between the reflected rays and the vertical? I think the answer is 60 am i correct

**Calculus**

yes I know that but I need to steps for how you find the derivative.

**Calculus**

thanks allie but i need someone to show the work to how they got those answers too please :)

**Calculus**

Let f(x)=x^2+5x-3. Find f′(x) and find f′(1).

**Calculus**

Take the derivative of the following functions. You do NOT need to simplify. h(x)=(6x^3+2x)/(x^2-3x+5)= F(x)=(5x^2+1)(3x-2) =

**Calculus**

Suppose that f(2)=3 and f′(2)=5. Let g(x)=x^3f(x). Evaluate g′(2). Your final answer should be a single number.

**Calculus**

Take the derivative of f(x) = 4x^3+(7/x^2).

**Calculus**

Let f(x)=21−x^2 The slope of the tangent line to the graph of f(x) at the point (−4,5) is ______ . The equation of the tangent line to the graph of f(x) at (−4,5) is y=mx+b for m=______ and b=_______.

**Calculus**

For what values of x is the tangent line of the graph of f(x)=8x3+36x2+46x−72 parallel to the line y=−2x+1.9 ? Enter the x values in order, smallest first, to 4 places of accuracy: x1= ≤ x2=

**Calculus**

If f(x)=(3x)/(1+x^2) find f′(4). Use this to find the equation of the tangent line to the curve y=3x1+x2 at the point (4,0.70588). The equation of this tangent line can be written in the form y=mx+b where m is: and where b is:

**Calculus**

If f(x)=(3)/(x^2) find f′(4).

**Calculus**

Let f(x)=sqrt(3+2x) f′(5)=

**help please :)**

yes it is D

**PHYSICS! HELP PLEASE**

A shopper pushes a cart 43 m south down one aisle and then turns 90.0° west and moves 15 m. He then makes another 90.0° turn and moves 10 m. (a) What is the largest possible displacement of the shopper? ______ m _____° counterclockwise from west (b) What is the ...

**Physics!**

A quarterback takes the ball from the line of scrimmage, runs backward for 10 yards, and then runs sideways parallel to the line of scrimmage for 4 yards. At this point, he throws a 32 yard forward pass straight down the field. What is the magnitude of the football's ...

**physics**

A 50 gram ice cube is cooled to -10oC in the freezer. How many calories of heat are required to heat it until it becomes liquid water at 20oC? (The specific heat of ice is 0.5 cal/goC.) Answer A) 1250 cal. B) 4000 cal. C) 5000 cal. D) 5250 cal. Can someone please help me solve...

**Science**

You have two cups, one containing 100 g of ice at 0oC, the other containing 100 g of water at 80oC. You pour the hot water into the cup containing the ice. What do you wind up with? A) 100 g of 0oC water and 100 g of 80oC water. B) 50 g of 0oC ice and 50g of 0oC water. C) 200 ...

**Math**

1/2 of the class played basketball 1/3 played cricket...on which day did more students play

**science**

thrs jguyvftrd

**Math**

Solve by Elimination 2x+3y=2 4x+6y=4 I got the answer there are infinitely many solutions I hope this is correct? Please help

**Math 116 A**

9<x<14 Write an interval notation

**algebra help bad!!!!**

Solve 2x+9 greater or equal to 5 and 2x-13greater or equal to 9 what is the solution? I have x=-2 and x=2 how do I write this {x x> what?

**math help asap**

what is the solution to 2x+9greater or less then 5 and 2x-13greater or equal to -9.