Friday

October 9, 2015
Total # Posts: 1,646

**math**

tom,jack and joe are the fastest runners in the school.if they race one another,without dead heats,how many combinations can they finish in if they occupy the first 3 places ?
*April 5, 2013*

**math**

in how many different orders can 4 children be arranged in a line,if john and julie refuse to stand next to one another ?
*April 5, 2013*

**Math **

Justin rides his bike in a rectangular route. He knows the total distance is 6,188 yards and the length of the shorter side of the route is 741 yards. What is the length of the longer side ?
*April 5, 2013*

**Chemistry**

1. If a student forms CaCO3 from the presence of carbon dioxide, but continued with the trial anyway, how would this affect his/her calculations (too high, too low, or no effect)? Explain your answers. a) The volume of NaOH required for the back titration. b) The calculated ...
*April 2, 2013*

**Chemistry**

4. A 5.309 g antacid tablet, with CaCO3 as the active ingredient, was mixed was 30.0 mL of 0.831 M HCl. It took 15.3 mL of 0.7034 M NaOH to neutralize the excess acid. a) Calculate the volume of HCl neutralized by the NaOH. b) Calculate the amount of HCl (in mL) neutralized by...
*April 2, 2013*

**physical science 2nd semester**

what is the reactant in this equation ?2HBr(aq)+ca(OH)2(aq)-->2H2O(i)+CaBr2(aq)
*April 2, 2013*

**physics**

[radius (perpendicular) * sin35º] / [radius perpendicular*cos 35º] -the radius cancel and your left with.... sin35º / cos35º =.70 is the coefficient of static friction
*April 1, 2013*

**trig**

I keep trying to find the power reducing formula for sin^4(x), but I can't seem to get all the fractional parts correct. The answer I should be getting is: sin^4(x)=(1/8)cos4x-(1/2)cos2x+(3/8) I can only get this far knowing feeling confident. When I go further I start ...
*March 19, 2013*

**Chemistry**

What volume (L) of 0.256 M potassium hydroxide solution would just neutralize 61.3 ml of 0.167 M H2SO4 solution?
*March 17, 2013*

**Chemistry**

What volume (L) of 0.256 M potassium hydroxide solution would just neutralize 61.3 ml of 0.167 M H2SO4 solution?
*March 17, 2013*

**Math**

How do you change 5x15 into distributive property?
*March 12, 2013*

**math**

A nurse needs to make 30 ml of 5% solution of glucose. She has available bottles containing 5 ml of 7% solution and bottles containing 10 ml of 1% solution. How many 5 ml bottles and 10 ml bottles will she need to make the solution? Bottles of 5 ml of 7% solution needed: ...
*March 11, 2013*

**Math**

A rectangular plot, 21m by 14m, is to be turned into a rectangular flower bed with a grass border around its outside edge. The grass border is to be 2m wide. What is the area of the flower bed? What is the area of the grass border?
*March 10, 2013*

**Science- chemistry**

fuzzy silver coating is impure silver. it can be converted back into silver nitrate by reacting it with nitric acid what has been done to the reaction mixture to recover solid silver nitrate?
*March 7, 2013*

**chemistry**

copper compounds such as copper (II) sulfate are toxic. before disposal, these compounds must be treated to reduce their toxicity. describe how to use steel wool to remove the Cu 2+ ions from an aqueous solution of copper (II) sulfate
*March 7, 2013*

**math**

Find three consecutive intergers whose product is 33 larger than the cube of the smallest integer.
*March 6, 2013*

**algebra one**

3(x+6) > 4(x-2) x is the number your looking for since it says greater than you need to place an inequalities sign above is how it should look just solve to get x by itself good luck
*March 5, 2013*

**algebra one**

-3(x+7) < -11 sounds like an inequality like what's depicted above again replace the number with a variable such as x and think about how the operations are correlated with the words now just solve to get x by itself, remember when you divide by a negative the sign will...
*March 5, 2013*

**Grammar**

You should try combining sentences that correspond or have similar subjects. Take the first two sentences could be combined since the second sentence describes what those model trains were like. The third and fourth sentences could also be combined since you could say although...
*March 5, 2013*

**Algebra 2**

Objective Function: C = 6x – 4y
*March 5, 2013*

**Physics**

A 3.0 kg block slides down a 4.5 m ramp of angle 30 degrees and collides inelastically with a 4.5 kg bolck at rest. Calculate the velocity after the collision.
*March 3, 2013*

**Math(Data Management)**

of the 11 girls in class: 6 dislike Trevor(T), 5 Dislike Bryce(B), 8 Dislike Drake(D), 3 Dislike T and B, 5 Dislike T and D, 4 Dislike B and D only Sue-Ellen is friends with all 3, place students in Venn Diagram and Find the Number and Describe?
*February 27, 2013*

**english**

We can touch different objects and feel things!! Or we can fix things n clocks can't, i dont know
*February 26, 2013*

**english**

What is a personification expression for hands on a clock?
*February 26, 2013*

**Physics**

High-speed stroboscopic photographs show that the head of a 197 g golf club is traveling at 36.8 m/s just before it strikes a 45.9 g golf ball at rest on a tee. After the collision, the club head travels (in the same direction) at 25.9 m/s. Find the speed of the golf ball ...
*February 26, 2013*

**physics**

A soccer ball with a mass of 415 g bounces off the crossbar of a goal and is deflected upward at an angle of 57° with respect to horizontal. Immediately after the deflection, the kinetic energy of the ball is 47 J. What are the vertical and horizontal components of the ...
*February 25, 2013*

**Physics**

Betty weighs 427 N and she is sitting on a playground swing seat that hangs 0.22 m above the ground. Tom pulls the swing back and releases it when the seat is 0.88 m above the ground. The acceleration of gravity is 9.8 m/s2. Betty is moving 3.5967 m/s when the swing passes ...
*February 20, 2013*

**Tuck Everlasting/Natalie Babbit**

is this right Toad-Freedom metamorphosis life growing and changing Wheel-Life flows round and round life and death endless rotating wheel life keeps going on and on Music box-Happiness and peacefulness tree symbol of life
*February 17, 2013*

**Tuck Everlasting/Natalie Babbit**

WHat are the symbols in this book. Tree Wheel Water Toad
*February 17, 2013*

**TUck everlasting/Natalie babbit**

WHat are the symbols in Tuck Everlasting?
*February 17, 2013*

**math**

Simplify using Pascal's Triangle: state a term number of formula and a value. What term number (Tn,r)is your answer? find the sum of row 12? I know that the sum is 2^12=4096, how would you find the term number?
*February 14, 2013*

**Math**

nate owes michael 5.00 nate expressed how much he owes as an integer Michael expressed how much nate owes him as an integer what do the two integers have in common
*February 8, 2013*

**Biology**

You are studying a large population of claims of which 396 are pink (t) and 557 are Tan (T). Tan clams are completely dominant over pink clams. Calculate the following: 1. The frequencies of each allele. 2. The expected genotypic frequencies. 3. The number of heterozygous ...
*February 7, 2013*

**Physical science**

How much energy would be needed to warm 1.5 L of water from 0 °C to 25 °C? The specific heat capacity of water is 4186 J/kg/°C.
*February 5, 2013*

**physical science**

How much energy would be needed to warm 1.5 L of water from 25 °C to 50 °C? The specific heat capacity of water is 4186 J/kg/°C.
*February 5, 2013*

**physics**

A rifle is aimed horizontally at a target 46.0away. The bullet hits the target 2.30 below the aim point. What is the bullet's flight time? What is the velocity as it leaves the barrel?
*February 1, 2013*

**algebra 1a**

12 + y -------- 36 + w
*January 31, 2013*

**Physics**

A crate of mass 59 kg is attached to one end of a string, and the other end of the string runs over a pulley and is held by a person as in the figure below. If the person pulls with a force of 94 N, what is the crate's acceleration?
*January 30, 2013*

**Math Homework**

In a clinical trial, a drug used to relieve pain caused side effects in 2% of the patients who took it. For a new trial, three patients were selected at random. Find the probability that all three of the patients had side effects
*January 30, 2013*

**Math**

Account numbers for Northern Oil Company consist of seven digits. If the first digit cannot be a 0 or 1, how many account numbers are possible?
*January 29, 2013*

**6 grade Math**

3 divided by 0.5 which is 6
*January 23, 2013*

**3rd grade math**

4
*January 23, 2013*

**math**

Alice is giving a book as a gift that is 8 3/8 inches long and 6 1/2 inches wide. Will the book fit in a box that is 8 1/2 inches long and 6 1/2 wid or in a box that is 8 inches long and 6 inches wide?
*January 14, 2013*

**physics **

sphere A has a mass of 4.2*10^-2 kg and is tethered to a wall by a thin thread. Sphere a has an excess of 1.2 *10^12 electrons. Sphere B has a deficit of 3.5*10^12 electrons and is o.23 m from sphere A a) determine the angle between the thread and the wall b) determine the ...
*January 13, 2013*

**math**

a farmer plant seeds in a field that is 125 meters length and 75 meters width. The seed must receive 1 liter per square meter every day and how many liters must farmer apply to the field every day?
*January 10, 2013*

**Math**

13/100
*January 8, 2013*

**geometry**

The Polygon Angle-Sum Theorem states the following: The sum of the measures of the angles of an n-gon is ____. (1 point) (n – 1)180o (n – 2)180o 9. What is the measure of one angle in a regular 16-gon? (1 point) 2,520o 202.5o 157.5o 78.75o 10. The measure of each ...
*December 31, 2012*

**calculus**

can someone please help me find all the zeros of the following polynomial. write the polynomial in factored form. f(x)=x^3-3x^2+16x-48 can you please show all work
*December 24, 2012*

**calculus**

how do I test the different regions??
*December 24, 2012*

**calculus**

solve the following inequality. write your solution in interval notation. x^3+9x^2-108 less than or equal to 0 please show all work
*December 24, 2012*

**Math**

A street is 282 m long is covered with snow. City workers are using a snowplow to clear the street. A tire on the snowplow has to turn 47 times in traveling the length of the street. What is the diameter of the tire?
*December 21, 2012*

**physics**

The coefficients of static and kinetic friction between a 50 kg box and a horizontal surface are 0.64 and 0.17, respectively. (a) What is the acceleration of the object if a 335 N horizontal force is applied to the box? m/s2 (b) What is the acceleration if the applied force is...
*December 18, 2012*

**Physics**

The coefficients of static and kinetic friction between a 50 kg box and a horizontal surface are 0.64 and 0.17, respectively. What is the acceleration of the object if a 335 N horizontal force is applied to the box?
*December 18, 2012*

**Math**

how do you change equivalent fractions with a common denominator
*December 12, 2012*

**math**

order the fractions from least to greatest 7/10 9/20 4/5
*December 12, 2012*

**physics**

a ball is thrown vertically upward at a speed of 45 m/s. how long does it take to return to the ground?
*December 11, 2012*

**physics**

A brother (mass 20 kg) and his big sister (mass 32 kg) want to play on a teeter-totter. The beam is 7 m long and has a mass of 41 kg. Suppose the brother sits at the end of his side, 3.5 m away from the pivot point. How far away from the pivot point does the sister need to ...
*December 10, 2012*

**Physics**

A 84 kg runningback is running at 3.5 m/s. The running back is met by 152 kg defensive lineman. If the collision between the runningback and the defensive lineman results in both coming to a stop, find the speed(absolute value) that the defensive lineman was moving at.
*December 10, 2012*

**Algebra Two **

Write the expression in simplified radical form. 2-2Square root 3 over 7+ square root 3
*December 7, 2012*

**Algebra 1**

4+9y-3>9y+6
*December 6, 2012*

**Math - percent of a #**

How do work this problem? 50% of what number is 46?
*December 6, 2012*

**Algebra 2 Rational Equations**

What is the solution set of the equation? I know the answer is {-1} I just don't know how to get there. X^2-16 x-3 --------- = ------- -1 (x+4)(x+2) (x+2)
*December 6, 2012*

**ap chem**

A calorimeter contains 20.0 of water at 12.5 . When 2.20 of (a substance with a molar mass of 59.0 ) is added, it dissolves via the reaction and the temperature of the solution increases to 27.5 . Calculate the enthalpy change, , for this reaction per mole of . Assume that the...
*December 3, 2012*

**Chemistry**

A propane stove burned 470. grams of propane and produced 625 milliliters of water. What is the % yield? C₃H₈+5O₂ -> 3CO₂+ 4H₂O
*November 29, 2012*

**English**

In class today we went over subordination an the different forms, but I'm still confused about subordination when it comes to the absolute and infinitive forms. How do you subordinate in these forms?
*November 28, 2012*

**precalculus**

Just plug in the height of 36 ft into the equation given for the height, then you can solve for t by subtracting 36, then dividing by 16, and square rooting your answer (make sure to take the positive square root).
*November 28, 2012*

**Math word problem**

10killograms
*November 28, 2012*

**math**

5/12 of my salary was spent on food, then I gave 3/7 of the remainder to my sister and had P856 left. How much did i spent for food? 4 units = ? 1 unit = ? food has 5 units = ? ?
*November 22, 2012*

**english**

I also agree with yours.
*November 18, 2012*

**Physics**

A baseball is thrown such that it is in the air for 4 seconds and lands 100 m away. Find the initial vertical and horizontal components of the baseball's velocity.
*November 14, 2012*

**Physics**

A bolt requires 15 Nm or torque to loosen it. How much force needs to be applied to a 20 cm long wrench to loosen the bolt? Assume the force is applied perpendicular to the handle of the wrench.
*November 14, 2012*

**Physics**

What is the orbital speed of a satellite of mass 490 kg in geostationary orbit?
*November 13, 2012*

**physics**

A crate of mass 96 kg is loaded onto the back of a flatbed truck. The coefficient of static friction between the box and the truck bed is 0.14. What is the smallest radius of curvature, R, the truck can take, if the speed with which it is going around a circle is 2.9 m/s?
*November 13, 2012*

**business math**

sorry henry but your wrong....
*November 12, 2012*

**math**

Hannah's grade on her last math test was 4 points more than Mark's grade. Write an expression for Hannah's grade, using m as a variable. Evaluate the expression if m=92.
*November 11, 2012*

**science**

how much skin covers 1 of your alveoli?
*November 11, 2012*

**English**

Correct
*November 11, 2012*

**Economics**

(This homework question was removed due to a copyright claim submitted by K12 Inc.)
*November 4, 2012*

**math**

My hundredths digit is the product of 3 x 2. My tenths digit is the multiple of 3 that comes before the digit that is in the hundredths place. My thousandths digit could not be any greater. What number am I?
*November 1, 2012*

**elementary**

nuber sense minnie has 6 county cds and 5 rock cds.amanda has 5 rock cds and 6 country cds.who has more cds?explain.
*October 31, 2012*

**elementary**

explain it jake says that adding 0 does not change a sum.is he correct?explain.
*October 31, 2012*

**elementary**

write your own sentence using the words: me
*October 30, 2012*

**English**

Identify whether the italicized words in the sentences below are used as participles or verbs. She’s an EXPERIENCED chef; she should have no trouble finding work. participle or verb? I would say participle.
*October 29, 2012*

**Math**

IM GONNA HELP BECAUSE I DID NOT TAKE NO HONOR CODE. 1D 2C 3D 4A 5A 6A 7C 8C
*October 29, 2012*

**PHYSICS!**

ok so waht oyu do is you find the pressure at the level the top is at which you would use P0+gh(density) then you use PA=F so for your problem it would be 1.013x10^5 +1000x.09x9.8=102182 102182x(.1)^2=1021.82 N for the top for the botom you would jsut add .12 to your origional...
*October 28, 2012*

**elementary**

Explain it sandy said she could use addition to answer question 1 how could this be done?
*October 25, 2012*

**elementary**

number sense fabio said that there are 3 times as many people on a basketball team as on a tennis team.is he correct?why or why not. tennis 2 players basketball 5 players
*October 25, 2012*

**College Chemistry**

Calculate the number of Joules released when 75.0 g of water are cooled from 100.0 degrees Celsius to 27.5 degrees Celsius
*October 25, 2012*

**Chemistry**

a certain first order decomposition reaction has a half-life of 15.0 minutes. What is the rate constant for this reaction? what is the time it will take for the reaction to reach the 10% completion point?
*October 24, 2012*

**Chemistry**

A solution of magnesium chloride, MgCl2, is prepared by dissolving 19.0g of MgCl2 in 250 mL OF water. a.) Calculate the weight percent of magnesium chloride in solution. b.)The denstiy of the above solution is 1.05 g/mL. Calculate the molarity of the magnesium chloride ...
*October 24, 2012*

**Chemistry**

The addition of a non-volatile, non-electrolyte will increase the amount of your vapor found above the solution over that of the pure liquid? (True or False)
*October 24, 2012*

**math**

Find the area of a walkway that goes around a rectangular swimming pool. The pool has a length of 30 feet and a width of 18 feet. The walkway has a width of 4 feet all around the pool.
*October 24, 2012*

**Physics**

For the first part of this question I got 12.12m/s B. With the help of a friend the boy measures the height to which the ball returns and finds it to be 5.2 meters. How fast was the ball moving when it left the ground? I wrote this down mass of ball: 0.40kg height if house: 7....
*October 23, 2012*

**Chemistry I**

In determining the heat capacity of a calorimeter, 50ml of water at 56*C is added to 50ml of water at 23*C. After about five minutes of mixing, the final temperature of the solution inside the calorimeter reached 37*C. Calculate the heat capacity of the calorimeter (J/*C-...
*October 22, 2012*

**Math**

3.4t+0.08=11
*October 22, 2012*

**Math**

-4b-5+2b=10
*October 22, 2012*

**Chemistry**

I titrated 0.25 grams of soda ash with 43.7 mL of HCl (0.115M) and 25 mL of H2O. I am getting over 100% sodium carbonate in my answer here are my steps that I took to get the answer can somebody help me see what I did wrong? mols HCl=(0.115M)x (0.0437L)=0.005 mol HCl 1/2 x (0....
*October 22, 2012*

**math**

Write a number sentence for the model. Let one white tile equal +1 and one black tile equal –1. A. –14 – (–6) = –8 B. 14 – 6 = 8 C. –14 – 6 = –8 D. –14 – (–6) = 8 i put d but it was rong
*October 22, 2012*

**elementary**

use, using,eat,eating,close,moan,wave,writing,looking,dream,skate,closing,trading,cleaning,clean,write,skating,waving,look,mail,mailing. write these spelling words vowels&conosonents all spelling words are vowels.no consonents.are u correct
*October 17, 2012*

**math**

the turning point for y= x^2-8x+2 is: A (2,-16) B (16,2) C (8,-2) D (-8,2) E (4,-14)
*October 16, 2012*