Tuesday
July 22, 2014

Posts by emily


Total # Posts: 2,298

math
How many 8 by 10 inch tiles fit on a 16 by 20 ft floor ?

math
what do the numbers 8/10,0.75,0.2 and 2/5 look like in order from least t greatest?

Math
A total number of 121 people came to the school science fair this year. This number is 7 MORE than TWICE the number of people who came last year's science fair. How many people came last year?

earth
what factors contribute to the formation of fertile, deep topsoil in temperate regions?

Physics
James's tug of war team pulls with 500N of force to the right wile Jake's team pulls with 415N to the left. If James's team weighs 350 kg, how fast are they moving?

physics
A lever has a Mechanical Advantage of 13. How much force would the lever exert if you push with a 200N force?

11th grade english
I'm supposed to choose how the italicized noun clause is used. Not so sure about the different types of noun clauses.. can someone help me? & also kinda explain the difference? 1.The first thing to consider was [how to find a paying job.] S OP PN DO 2.I am optimistic enoug...

Physics
Two carts with masses of 4.24 kg and 3.44 kg move toward each other on a frictionless track with speeds of 4.90 m/s and 3.51 m/s respectively. The carts stick together after colliding head-on. Find the final speed.

Math
If Alice earns a monthly salary of $315 plus a comission on her total sales. Last month her total sales were $9640 and she earned a total of $1182.60. What is her comission rate?

algebra
k but how do I find that?

algebra
write an equation of the line that passes through the given point and is parallel to the given line (-1,3), y=2x+2

Government
The correct answer is the television.

Science
Stage of mitosis in which Chromosomes split apart

Physics
What is the maximum acceleration of a platform that oscillates with an amplitude of 2.1 cm at a frequency of 6.7 Hz? I feel like this is a very simple question, but I'm having trouble figuring it out.

Physics
A radio set at a sound level of 20 dB is suddenly increased to 80 dB. how many more time greater is the pressure amplitude at 80 dB? I do not know what to do please help

Calculus I
Find the exact area of the surface obtained by rotating the curve about the x-axis. y = sqrt(1+5x) from 1<x<7

Calculus I
Find the exact area of the surface obtained by rotating the curve about the x-axis. y = sqrt(1+5x) from 1<x<7

3rd Grade Math
Why is this statement wrong? The greater number of counters, the greater the number of arrays you can form.

COMPUTER HARDWARE MANAGEMENT
AMD (Advanced Micro Devices) is the second largest maker of personal computer microprocessors after Intel. They also make flash memory, integrated circuits for networking devices, and programmable logic devices. AMD reports that it has sold over 100 million x86 (Windows-compat...

English
c

algebra
There are 7 coins in a piggy bank. The coins are all quarters and dimes. All together the total amount of money in the bank is $1.15. How many of each coin are in the piggy bank.

Physics
Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 2.58 kg·m2 about its central axis, is set spinning counterclockwise (w...

Social Studies
During Rutherford B. Hayes's presidential run, what's was bad or good about it?

MATH
no, why?

MATH
i need this as quick as possible please Omar is building a straight fence, with posts one meter apart. If the fence is 13 meters long, how many fence posts does he need? If the fence is 13 meters long, how many fence posts does he need?

Physics
If a&b are vectors such that a+3b=-3i+j & a-b=i-2j then find vectors a&b.

Math
A fence 8 ft tall runs parallel to a tall building at a distance of 4 ft from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

Physics
Suppose vectors a&b, if a cross b=c. Show that c is perpendicular to a&b.

math
The height of an object thrown upward with an initial velocity of 96 feet per second is given by the formula h = -16t2 + 96t, where t is the time in seconds. How long will it take the object to reach a height of 144 feet?

Sport please help me i have a test 2morrow
What are the reasons for the olympic games to be largest of all sporting events?

Sport
Why Olympia selected to hold at the ancient Olympic Games?

english 2
WHAT INFERENCE CAN YOU MAKE FROM THE FACT THAT IT IS FORBIDDEN TO GO TO THE PLACE-BY THE WATER OF BABYLON

Physics
Calculate the rotational inertia of a wheel that has a kinetic energy of 41.6 kJ when rotating at 264 rev/min.

Pre-Algebra
ok well my pre algebra teacher copied some worksheets and its pg 40 and its about some friars in a floral shop buisness. for extra credit we do the joke which is also a way to find out if our answers were correct. there is no 3/8 in my answers and welll yeah thats it.

Pre-Algebra
Ok so im in 7th grade and can somone help me with pizzazz worksheet #40? Pretty please?

chemistry
Write the formula unit, total ionic, and net ionic equation for the precipitation reaction in a beaker after Al(ClO4)3, Rb2S, and CsI salts are added. Please help!

factoring polynomials help?
5p^2+14p+8

Math
if a football team gained 13 yards in 3 tries how many yards will they gain in 9 tries

Chemistry
Sorry Dr. Bob, I wsa looking for the Sucrose, not all 16 calculations. Can you help me with the Sucrose? I have 93.954 mL of a generic cola solution. The solution contains: Molarity of H++1.005e-7 Molarity of OH- = 1.005e-7 Molarity of Sucrose(aq) = 6.386e-1 Molarity of Dye= ...

Chemistry
I have 93.954 mL of a generic cola solution. The solution contains: Molarity of H++1.005e-7 Molarity of OH- = 1.005e-7 Molarity of Sucrose(aq) = 6.386e-1 Molarity of Dye= 5.322e-3 Calculate the mass percent, molarity, molality and mole fraction.

Language Arts
I was so tired when I got home, my bed welcome me with open arms.what does this mean?

calculus
The hypotenuse of a right triangle has one end at the origin and one end on the curve y = (x^4)(e^-7x), with x > 0. One of the other two sides is on the x-axis, the other side is parallel to the y-axis. Find the maximum area of such a triangle.

calculus
The hypotenuse of a right triangle has one end at the origin and one end on the curve y = (x^4)(e^-7x), with x > 0. One of the other two sides is on the x-axis, the other side is parallel to the y-axis. Find the maximum area of such a triangle.

Math word problem
can you explain how you got it?

Math word problem
jack was 21 years older than kat. Together their ages totaled 161 years. What were their ages?

Physics
A 0.5 kg wooden block is placed on top of a 1.0 kg wooden block. The coefficient of static friction between the two blocks is 0.35. The coefficient of kinetic friction between the lower block and the level table is 0.2. What is the maximum horizontal force that can be applied ...

calculus
f(x)=cos(1/x) Find a sequence for x-values that approach 0 such that cos(1/x)=0.

chemistry
If you have a solution that is 1.7 M sodium chloride and you have 1 L of that solution, how many moles of sodium chloride do you have?

Math
Maria has $5.05 in quarters and dimes. The number of quarters exceeds twice the number of dimes by 1. Find the number she has of each kind.

MATH
22. Your class hopes to collect at least 325 cans of food for the annual food drive. There were 135 cans donated the first week and 89 more the second week. help plz i HATE math a. Write an inequality that describes this situation. Let c represent the number of cans of food th...

Chemistry
Calculate the mass of solid neded to make 500ml of solution that is 0.25m in sulfate ion, using sodium sulfate decahydrate.

algebra
thanx :)

algebra
i REALLY need some help with this. i HATE math! :(

algebra
1. - 5(2x+2)is greater than or equal to -10x - 17 (1 point) a)x is greater than or equal to 7 b)x is less than or equal to 19 c)all real numbers d)no solution

LA/Lit.
Word withing the word analogies. primate is to primeval as coelenterate is to medieval deliberate is to archival ingrate is to credible migrate is to primal

geometry
given line segment PQ , PQ=3QR, and QR= 1/3 RS Prove: line segment PQ is congruent to line segment RS

statistics
IQ scores are normally distributed and assume that the average IQ for all Economics majors is 108 with a standard deviation of 11. What percentage of Economics majors would have an IQ of more than 118?

statistics
Suppose the amount of time it takes for statistics students to complete their midterm is normally distributed with a mean of 85.70 minutes and a standard deviation of 22.55 minutes. If 10 students are randomly selected, what is the probability that they would average less than...

geometry
triangle ABC is an isosceles right triangle. The endpoints of the hypotenuse of ABC are A(4,7)B(8,1). Find the possible coordinates for the vertex C

Alegra 2
A baseball is hit at a point of 3 feet above ground at a velocity of 100 feet per second and an angle of 45 degrees. The path of the baseball is h(x)= -0.0032(x-156.25)squared+87, where x and h(x) are measured in feet. A. what is the baseball's maximium height? B. will the...

Chem
A radiation lab orders 64uCi of P-32. After 42 days the activity of the sample is 8.0uCi. What is the life of P-32? Thanks

chemistry
I got yeah! 40---> 20----> 10 5,730---> = 11,460 years

Algebra 1
(-10/10) - (-18/9)

social studies
Lack of food, didnt know how to provide for themselves in the new world

math
3a to the third plus 12a squared minus 63a

science
The specific heat of silver is 0.057 calories/gram°C. If 10.0 grams of silver were heated and the temperature of the sample changed by 20.0°C, how many calories of heat energy were absorbed by the sample? (A)3,508 calories (B)0.029 calories (C)11.4 calories (D)0.114 ca...

chem
How many grams of H20 are produced when 140 grams of NH3 reacts by the following? Answer in 3 SF 4NH3+6NO--->5N2+6H20 Please help! Thanks

Chemistry
How many moles of CaCl2 are in 250mL of a 3.0M of CaCl2? Ca=40.08 -- Cl=35.45 X 2 ?? Thanks

pre algebra
how do you simplyfy -9+-9+-9+-9

pre algebra
how do i figure out how to write a number setence for the product on the number line -10 -8 -6 -4 -2 0 2

Physics
A 0.30 kg stone attached to a 0.8 m long string is rotated in a horizontal plane. The string makes an angle of 15° with the horizontal. Determine the speed of the stone.

physics
An object is dropped from a cliff and reaches a velocity of 47.5 m/s at the time of impact. a) How high is the cliff? b)How long did it take to hit the river below?

physics
a 75 kg person escapes from a burning building by jumping from a window 30 m above a catching net. Acceleration due to gravity is 9.81 m/s^2. Assuming air resistance is simply a constant 96 N force on the person during the fall, determine the person's velocity just before ...

math
6.2 hours...?

physics
A skier is accelerating down a 30.0° hill at a = 3.70 m/s2 ( (a) What is the vertical component of her acceleration? |m/s2 (downward) (b) How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevation ch...

physics
A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 13 m/s. The cliff is h = 58 m above the water's surface, as shown below. (a) How long does it take for the stone to fall to the water? s (b) With what speed does it strike the...

Physics
A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials' boat pulls up next to the spy's boat, both reach the edge of a 7.5 m waterfall. If the spy's speed is 19 m/s and the officials' speed is 24 m/s,...

math
5464

Statistics
Each year, thousands of college seniors take the Graduate Record Examination (GRE). Assume the scores are transformed so they have a mean of 600 and a standard deviation of 150. Furthermore, the scores are known to be normally distributed. Determine the percentage of students ...

Physics
Estimate the force a person must exert on a string attached to a 0.160 kg ball to make the ball revolve in a circle when the length of the string is 0.600 m. The ball makes 1.80 revolutions per second. Do not ignore the weight of the ball. In particular, find the magnitude of ...

physics
During a basketball game, a player flies above the basket and drops the ball in from a height of 10 meters. If the ball takes 4.4 seconds to fall, find the acceleration due to gravity.

Physics
A dog team driven by an Inuit hunter pulls two toboggans (Figure 1.49). The dog team can apply a maximum force of 700 N. Each toboggan experiences a constant frictional force of 100 N. a) Determine the acceleration of the two toboggans, if each has a mass of 300 kg. b) What is...

Chemistry
Sam Student calibrates a flask with water at 20C. Patricia Pupil borrows the flask and Sam's calculated volume for the flask, and uses it to do her unknown at 25 C. What, if any specific effect will this have on the results of Patricia's density determination? Explain ...

Is this write or wrong?
Yes, B is the right answer.

physics
A rocket-driven sled running on a straight, level track has been used to study the physiological effects of large accelerations on astronauts. One such sled can attain a speed of 440 m/s in 1.9 s starting from rest. What is the acceleration of the sled, assuming it is c...

physics
suppose that all the people of the earth went to the north pole and on a signal all jump straight up. estimate the recoil speed of the earth. the mass of the earth is 6 x 10^24 kg and there are about 6 billion people(6 x 10^9).

math HELP!!
You use compatible numbers .

math HELP!!
U would do 60,000 divided by 50 because 60,000 is close to 56,225 and 48 is close to 50

math HELP!!
U would do 60,000 divided by 50 and u would get 1,200 so the answer would be C!

statistics
compute the percentile rank of the raw score 8 in the following distribution 8,5,6,9,3,5

economics
Do you think lotteries have both micro and macro economic effects or only micro? How do lotteries change what and for whom goods and services are produced?

physics
A bus that is traveling at 35.0 km/h, speeds up at a constant rate of 3.4 m/s2. What velocity does it reach 6.8 s later?

math
Man 6 feet tall cast shadow 15 ft long. Girl is 5 ft. 10 inches how long will her shadow be

math
simplify: -8+c+(-10) simplify: -12-w+20 simplify: -3(2y-9)+y

algebra 1
45

algebra 1
Suppose you walk at the rate of 210 ft/min. You need to walk 10,000 ft. How many more minutes will it take you to finish if you have already walked 550 ft?

Physics
What is the velocity at the midway point of a ball able to reach a height y when thrown with an initial velocity v0? (Assume the ball is thrown upward and that up is the positive direction. Use the following as necessary: y and g. )

Math
My sister learned simplifying fractions and long division

Physics
The vertical position of a ball suspended by a rubber band is given by the equation y(t) = (3.4 m)sin(0.49 t/s − 0.40) − (0.4 m/s)t + 5.4 m. (a) What are the equations for velocity and acceleration for this ball? (Use the following as necessary: t.) (b) For what ti...

chemistry
Calculate the amount of heat required to heat a 42kg sample of ethanol from 14.0C to 18.0C

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