# Posts by Ian

Total # Posts: 280

**Maths**

In triangle ABC, D is the midpoint of AC and E is the midpoint of AB. BD and CE are perpendicular to each other and intersect at the point G. If AB=7 and AC=9, what is the value of BC^2?

*April 12, 2013*

**Maths**

Triangle ABC has lengths AB=14, AC=18 and also a given angle of ∠BAC=30∘. What is the area of triangle ABC?

*April 12, 2013*

**Maths**

If two six-sided dice are rolled, the probability that they both show the same number can be expressed as ab where a and b are coprime positive integers. What is the value of a+b?

*April 10, 2013*

**Maths**

Dont understand the a,b one TT

*April 10, 2013*

**Maths**

Two players each flip a fair coin. The probability that they get the same result can be expressed as ab where a and b are coprime positive integers. What is the value of a+b?

*April 10, 2013*

**ELA**

Which of the following is a simple sentence? A.Dawn mounted the stage slowly B.As she stepped in front of the podium,her legs were trembling. C.She was a talented speaker,and she greatly admired Dr.King. D.When she looked up again,her brother grinned and winked.

*April 6, 2013*

**Maths**

a and b are digits such that 120ab¯¯¯¯¯¯¯¯ is a multiple of 3, 5 and 7. What is the value of ab¯¯¯? Details and assumptions abc¯¯¯¯¯ means 100a+10b+1c, as opposed to a×b×c. As an ...

*March 29, 2013*

**Maths**

Let f be the function defined as f(x)=x^2 in the domain [−7,+7]. The range of f(x) is [a,b]. What is the value of a+b?

*March 29, 2013*

**Maths**

How many integers satisfy the inequality ∣10(x+1)/(x^2+2x+3)∣≥1?

*March 28, 2013*

**Maths**

Given tanθ=−4/3, where π/2<θ<π, what is the value of 1/(sinθ+cosθ)?

*March 28, 2013*

**Maths**

What is the sum of all integer values of n satisfying 1≤n≤100, such that n^2−1 is a product of exactly two distinct prime numbers?

*March 28, 2013*

**Maths**

What is the sum of all integer values of n satisfying 1≤n≤100, such that n2−1 is a product of exactly two distinct prime numbers?

*March 28, 2013*

**Maths**

Let f be the function defined as f(x)=x2 in the domain [−7,+7]. The range of f(x) is [a,b]. What is the value of a+b?

*March 28, 2013*

**Maths**

What is the sum of all integer values of n satisfying 1≤n≤100, such that n2−1 is a product of exactly two distinct prime numbers?

*March 28, 2013*

**Algebra**

ab = 75 Archaic solution: only possibilities for ab are 01 through 99. Eliminate all of those not divisible by 5, which leaves: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55. 60, 65, 70, 75, 80, 85, 90, and 95. Eliminate those not divisible by 3 (divisibility rule for 3) , which ...

*March 26, 2013*

**Physics**

Jake has a mass of 88.0 kg and is zooming along in a 110.0-kg bumper car at 9.4 m/s. He bumped Allen's car, which is sitting at rest. Allen has a mass of 88.0 kg. After the elastic collision, Jake continues ahead with a speed of 3.2 m/s. How fast is Allen's car bumped ...

*March 18, 2013*

**Chemistry**

Hg + 4H+NO-3 ---> Hg2+(NO3-)2 +2NO2 + 2H2O

*March 7, 2013*

**Chemistry**

Hg + 4H+NO-3 ---> Hg2+(NO3-)2 +2NO2 + 2H2O

*March 7, 2013*

**geometry**

Write an equation for each circle described. Center at origin,radius is 3. I'm stuck.aren't I suppose to be given an endpoint for me to be able to use the midpoint formula to find the center? I need help please...oh that's the only thing they give me.

*February 19, 2013*

**Physics**

The electric field intensity at a point 2m from the surface of a uniformly charged conducting sphere is 1920 N/C. At a point 4m from its center, the electric field intensity is 3000 N/C. a.) Determine the radius of the sphere. Determine the electric field intensity at a point...

*February 4, 2013*

**geometry**

Two observers are 200 feet apart,in line with a tree containing a birds nest.The anles of elevation to the birds nest are 30 degrees and 60 degrees.How far is each observer from the base of the tree? Please help me my assigment is due tommorrow!!!!!

*January 24, 2013*

**geometry**

I need help on a question that wants me to find x and y on a 45-45-90 triangle they only give me one side wich is three.I already solved for x which is three root two over two...Is that right? I don't know how to solve for y... Please someone help me....:(

*January 22, 2013*

**geometry**

I need help on a question that wants me to find x and y on a 45-45-90 triangle they only give me one side wich is three.I already solved for x which is three root two over two...Is that right? I don't know how to solve for y... Please someone help me....:(

*January 20, 2013*

**Chemistry**

KF has the same type of crystal structure as NaCl. The unit cell of KF has an edge length of 5.39 Å. Find the density of KF in g/cm3

*December 8, 2012*

**Chemistry**

KF has the same type of crystal structure as NaCl. The unit cell of KF has an edge length of 5.39 Å. Find the density of KF in g/cm3

*December 8, 2012*

**math**

Tamara has 4 times as many pages to read for her book report as maria. Tamara has 20 pages left to read. how many pages does maria have left to read?

*November 26, 2012*

**algebra**

A roast chicken is done with the temperature of the thigh meat is between 165 and 175. Write a compound inequality to represent the temperature at which a roast chicken is done.

*November 20, 2012*

**Calculus I**

How did you get 2r for the height in the volume of water?

*November 12, 2012*

**Calculus**

The region between the graphs of x=y^2 and x=4y is rotated around the line y=4. The volume of the resulting solid is?

*October 26, 2012*

**Physics**

sorry I mean num 6,7

*October 26, 2012*

**Physics**

has anybody done num 10? it doesn't tell you where "that instant" is so what the hell?

*October 26, 2012*

**Physics**

i cant get the answer... thx for the help tho mike.

*October 25, 2012*

**Physics**

kaminsky hooray :p

*October 25, 2012*

**trig**

b=8944ft

*October 15, 2012*

**Physics**

The steel ball is suspended from the accelerating frame by the two cords A and B. The angles (they are on the inside) are both 60 degrees. Determine the acceleration of the frame which will cause the tension in A to be twice that in B. The acceleration is going to the right ...

*October 4, 2012*

**Math**

24:30 or 4:5 .... or 4/5 ... or 4 to five

*October 4, 2012*

**physics**

Use range equation: d = [v^2(sin2theta)]÷g 18 = [v^2(0.58778)]÷9.8 (18 x 9.8)÷0.58778 = v^2 v^2 = 216.745 v = 14.722 m/s Hope this helps :)

*October 4, 2012*

**geometry**

"Determine whether the conjecture is true or false.Give a counterexample for any false conjecture". Given: x = 5 Conjecture: m = 5 PLEASE HELP!!!

*September 18, 2012*

**geometry**

Determine whether each conjecture is true or false.Give a counter example for any false conjecture. Given:Angle 1 and angle 2 are not complementary.angle 2 and angle 3 are complementary. Conjecture:angle1=angle3

*September 12, 2012*

**geometry**

I need help on this question "Find the value of the variable and GH if H is between G and I". GI=8b+2,HI=3b-2,HI=16 Please helo me....

*August 29, 2012*

**geometry**

Thank you!!!

*August 28, 2012*

**geometry**

I need help on this homework question KL and KJ are opposites rays.Angle 1 is congruent to angle 2 and KM bisects angle NKL.If angle JKN=9x+5 and angle MKL=2x+3,what is angle MKN? Please help me....

*August 28, 2012*

**Math**

is that true? the answer, how old are you two?

*July 11, 2012*

**calculus**

Each of the sides of a square (S) with an area of 16 is bisected and a smaller square (S2) is constructed using the bisected parts as vertices. The same process is carried out on S2 to construct an even smaller square (S3). What's the area of S3? (Draw a diagram, please?)

*June 5, 2012*

**math**

Thank you very much!

*May 13, 2012*

**math**

2 planes parallel to the base of a pyramid cut the pyramid at 1/4 and 2/3 of the height as measured from the base up. If the volume of the pyramid is 100 cubic inches, what is the volume of the middle piece to the nearest tenth?

*May 13, 2012*

**math**

What is 3/8 divided by 9/10?

*May 6, 2012*

**geometry**

draw it, it always helps you will see that you need to use Tangent "Opposite over adjacent" tan(angle)=65/20

*April 22, 2012*

**Math**

3 hours

*April 6, 2012*

**Math**

If it takes 45 minutes to make 15 chairs how long would it take to make 100 chairs.

*April 6, 2012*

**physics**

A tow truck is connected to a 1500 kg car by a cable that makes a 27 degree angle to the horizontal. If the truck accelerates at 0.58 m/s^2, what is the magnitude of the cable tension? Neglect friction and the mass of the cable.

*April 1, 2012*

**physics**

A 140 g arrow is shot vertically from a bow whose effective spring constant is 500 N/m. If the bow is drawn 60 cm before shooting the arrow,to what height does the arrow rise?

*April 1, 2012*

**chemistry**

my K value was right. My mistake was when I plugged my values from my ICE table into the expression I used 0.25x^2/1.35-x instead of just x^2/1.35-x. Everything else was right.Thanks anyway

*March 24, 2012*

**chemistry**

At 298 K, 1.35 mol BrCl(g) is introduced into a 12.0 L vessel, and equilibrium is established in the reaction. BrCl(g)-->0.5Br2(g) + 0.5Cl2(g) Calculate the amount of BrCl(g) present when equilibrium is established.(Use delta G[Br2(g)]=3.11kJ/mol and delta G[BrCl(g)=-0.98Kj...

*March 24, 2012*

**Physics**

The problem is the notation. That is not kilo-newtons, that is k hat newtons. it should be 8/(17*1*3)

*March 3, 2012*

**business**

The answer to 18 is A - pie chart

*February 10, 2012*

**geometry**

A park at the end of a city block is a right triangle with legs 150 ft and 200 ft long. Make a scale drawing of the park using the following scale 1in:300ft.

*February 1, 2012*

**chem**

I have to find the effective pH range of a buffer. I read that this optimal buffering occurs when the pH is within 1 pH unit from the pK value for the buffering system. But can anyone explain why its is optimal within 1 pH unit? Thanks.

*January 28, 2012*

**Science**

What is a reference point in determining force, velocity,speed?

*January 22, 2012*

**Science**

If a car is going 65mph makes a 90 degree, what changes?

*January 22, 2012*

**statistics**

8. Assume that the MM207 Student Data Set is a random sample of all Kaplan students; estimate the proportion of all Kaplan students who are male using a 90% level of confidence.

*January 18, 2012*

**math**

p=6s,for s

*January 16, 2012*

**physics**

If a sprinter’s velocity increases to three times the original velocity, by what factor does the kinetic energy increase?

*December 21, 2011*

**history**

why did people come to jamestown? Opitional homework question (If you read the book "Our Strange New Land" , why did elizabeth go to jamestown.

*November 30, 2011*

**chemistry**

dont i have to use 10.7 torr and convert it to atm,then it gives me o.01407..otherwise.my mol is a very big number..

*November 28, 2011*

**chemistry**

yeah ur right..it should be 0.0804 g/mL..sorry bout that..

*November 28, 2011*

**chemistry**

if u place 10 L of propanol (C3H8O)in a sealed room that is 7.5 m long , 3 m wide and 3 m high, will all the propanol eveporate?if some liquid remains, how much will there be?the vaopr pressure of propanol is 10.7 torr at 25 C, and the density if the liquid at this temperature...

*November 28, 2011*

**physics**

An airplane passenger carries a 250 N suitcase up the stairs, a displacement of 4.70 m vertically, and 5.30 m horizontally. How much work does the passenger do?

*November 16, 2011*

**Physics**

What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 28 km/h and the μs between tires and track is 0.28? (Answer must be in meters)

*November 8, 2011*

**calculus**

Find all discontinuities of the given function. Also, describe the discontinuities. f(x)= [(x-8)^2(x+3)(2x^2+3x-5)]/[(x+4)^2(2x+5)(x-3)(x^2-1)]

*October 15, 2011*

**Physics**

if the speed of the block is 9.5 m/s at the bottom of the ramp, from what height was the block released? what is the length of the ramp?" and i know that the mass is 7 kg, initial veloctity=0, it is frictionless, and inclined at an angle of 62 degreesif the speed of the ...

*October 3, 2011*

**physics 1**

a 5.00kg object placed on a frictionless horizontal table is connected to a string tat passes over a pulley and then is fastened to a hanging 9.00kg object.Find the acceleration of the two objects and the tension in the string.

*August 3, 2011*

**Math problems**

Pounds double 18 = 36 Odd number x 50 is 1 Means answer is £36.50

*June 5, 2011*

**Math problems**

£36.50

*June 5, 2011*

**Science**

If a 500kg horse is moving at a speed of 15 mph what is its kinetic magnitude?

*May 28, 2011*

**7th g science**

who is lonesome george?

*May 13, 2011*

**science**

why are most of the animals on the galapagos islands fearless of humans

*May 13, 2011*

**business communication**

The answer is A. defer to the hiring company to take control of the interview process

*April 6, 2011*

**physics**

y = Vi(t) + 1/2(a)(t^2) 400 = (0m/s)t + 1/2(9.8)(t^2) use the quadratic equation to solve for t

*March 8, 2011*

**math**

The opposite angles of a parallelogram are congruent. The adjacent angles are supplementary. If angle X measures 110 degrees, then what are the measures of angle Y and angle Z?

*March 1, 2011*

**Science**

How do i draw a genotype?

*February 15, 2011*

**Internet - IT**

Hi, Can some confirm that both the TCP/IP and OSI model are both examples reference models. I feel that both are reference models. And lastly is it right that, DHCP is a protocol that enables network devices to share a pool of IP addresses. and is a protocol that operates at ...

*February 5, 2011*

**Health**

It ask me describe the 3 elements of Health i got all but one and it wants me to define what mental health is.

*January 13, 2011*

**Math Problem Solving**

6n+(8n-2n)+3 ____________ 2 simplfy this expression

*December 21, 2010*

**Math Problem Solving**

6n+(8n-2n)+3/2

*December 21, 2010*

**Math Problem Solving**

6n+(8n-2n)+3/2

*December 21, 2010*

**6th grade**

If you throw 500 darts at a hexagonal shaped dart board, how many will land in the shaded area? hexagon is divided into 24 triangles. 6 are shaded and 18 are white

*December 21, 2010*

**physics**

the specific heat of the glass is 840 J/kg*C, it's in one of the tables in the book but it's really stupid how they don't give that with the problem

*December 13, 2010*

**college math**

Use the Reference Angle Theorem to find the exact value of sec(13 pi/6).

*December 11, 2010*

**Science**

Light is shone on a metal and photoelectrons are emitted, what are the three things which might cause the photoelectron emission to stop

*December 9, 2010*

**Math2**

if arc AC=140 degrees, what is angle ABC? if angle ABC=28 degrees, what is arc AC?

*December 5, 2010*

**10th grade**

if AB=3x-2 and BC=x+6, what is x?

*December 5, 2010*

**chemistry**

If the previous two people were to use common sense, they might realize that Nitroglycerin is made up of carbon, hydrogen, nitrogen, and oxygen. If you look in the {}, you will see the chemical symbol for Carbon (C), Hydrogen (H), Nitrogen (N), and Oxygen (O). And if you had ...

*September 24, 2010*

**algebra**

3x²-x=7 √x √7 3x-x=√7 2x=√7 x=√7/2 or x=1.32

*September 23, 2010*

**4th grade**

Copy and complete the table to represent the pattern in the figures. Write a rule. Figure 1 one triangle Figure 2 3 triangles(in a pyramid shape) Figure 3 6 triangles(in a pyramid shape) Thanks for your help.

*September 23, 2010*

**Physics**

Thank you-I appreciate it

*September 6, 2010*

**Physics**

When James applied the brakes to his car, it slows unifromly from 15.0 m/s to 0.0 m/s in 2.50 s. How many meters before a stop sign must she apply her brakes in order to stop at the sign? Answers: 6.0m 37.5 m 18.8 m 48.0m Please help-I've just started Physics last week and...

*September 6, 2010*

**Physics**

Suppose that you are at the top of a (rigid) rocket which is half a light year tall. If the rocket is accelerating such that your proper acceleration is 1g, What is the proper acceleration at the bottom of the rocket? B = F c2 c2 F : This is one of the...

*September 5, 2010*