Saturday
March 8, 2014

# Posts by sunny

Total # Posts: 173

physics lab
The experiment done in lab is repeated, using a ball that has unknown mass m. You plot your data in the form of f 2 versus M/L, with f in rev/s, M in kg, and L in m. Your data falls close to a straight line that has slope 7.82 m/(kg · s2). Use g = 9.80 m/s2 and ca...

physics
A small block has a horizontal velocity of 4.00 m/s as it slides off the edge of a table. The table is a vertical distance of 0.95 m above the floor. If g = 9.80 m/s2, how far does the block travel horizontally while it is in the air?

Math
When Marcia started walking a 6 mile section of the trail, it took her 3.3 hours.After 1week her time was 3.1hours and after 2 weeks, it was 2.9 hours. If the pattern continues, what will Marcia's time be after 5 weeks?

Science
How are the reactants and products of photosynthesis and cellular respiration related?

Stats
The random variable U has mean 10 and standard deviation 5.The random variable V is de ned by V =12(U + 5).Find the mean and standard deviation of V.

Statistics
To CC, 2 is B, 6 is B

Math
Yes... But SOL math test told me 5/18 was not the answer....it is 2 and 1/2

Math
Ms. Sue I did but got it wrong was told the answer was 2 and 1/2.. don't understand?

Math
Which fraction is equivalent to 5/6 * 1/3 ? 5/18 2/5 1 and 1/6 2 and 1/2

Math
Which fraction is equivalent to 5/6 (divided sign) 1/3? 5/18 2/5 1and 1/6 2and1/2

calc
x^2 + √(x+y) + y^2 = 0; y is a differentiable function of x

CALCULUS
substitute 4 into x (4^2+3(4)+4)/(5(4)-12) =4

Math
factors of 10 (10,1,2,5) since you get 5-2 = 3...you would use 5,2 (x +5)*(x-2) = foil x^2 +(-2x)+5x-10 = x^2 + 3x - 10

math 12
answer is C, you can graph it, and see the extremas

calc
Integrate 1/(ln(x)); f(e^e)=1 please provide step! confused because of f(e^e)!

calculus
thank you

math
Given that a sports arena will have a 1400 meter perimeter and will have semi- circles at the ends with a possible rectangular area between the semi-circles, determine the dimensions of the rectangle and semi-circles that will maximize the total area.

social studies
Think about it, if China per say, attacks US, the US bases in the pacific islands would see it coming. Then the US would be prepared for an attack rather than be surprised by it. Also, they would have an easier trade route with the eastern Asian countries, like china, japan, r...

math
integrate (x^2 + 2x + 5) / (x - 2)

Math
you don't need to convert it, just answer it as 2 2/7 kilograms, the x is already in kilorgrams

Math
A polynomial is an expression which combines constants, variables and exponents using multiplication, addition and subtraction.

Math
almonds rate per kg is \$8.50 , peanuts price per kg is \$4.50 and avg price is \$5.30 so subtract avg value from the given prices we will get the ratio of almonds to peanuts 8.50-5.30=3.2 and 5.30-4.50=0.8 so the ratio of almonds to peanuts is 3.2 : 0.8 but by the method the rat...

calc
Given X^2 + Y^2 = R^2, namely, a circle with center (0,0) and radius R, use integration to prove that the circle’s area equals πR2

calc
Integrate 2(x^2)e^g(x) where g(x)=4^(x^3)

math
the 3 is the base so log(base3)(...log(base/e)(x)

math
Find f’(x) if f(x) = 3^g(x) where g(x) = LOG_3(x^2 - √x + 4/x + 10*LOG_e(x))

Chemistry
How many grams of CaCl2 would be required to produce a 3.5M(molar) solution with a volume of 2.0L?

science
Why is it difficult to distinguish between some pure substances and solutions? What methods can overcome this to define if either it is a pure substance or solution?

Math
Thanks.

Math
A drama teacher needs to make 6 costumes for dancers in a play. Each costumes takes one and a half meters of cloth.The cloth is sold only by the yard.What is the best estimate of the number of yards the teacher must buy to make sure she has enough cloth for the six costumes?

algebra (f°g) problem
easy f(gx)(2) so f(x)=5(1/x) + 9 f(2)=5(1/2) + 9 f(2)= 2.5 + 9 = 11.5 or 23/2

Maths
cross multiply and simplify

(x^2-6x-15)=e^5 e^5 is approximately 148.41 so x^2-6x=148.41-15 x^2-6x = 133.41 x-6x = sqrt(133.41) -5x = 11.55 x = 11.55/-5 x = 2.31

Math
can you explain how you got that please?

Math
Ignoring the walls’ thickness, determine the outside dimensions that will minimize a closed box’s cost if it has a square base and top, if its volume is 32 cubic meters, and if the cost per square meter for the top, bottom, and sides respectively are \$.03, \$.04, and ...

Math
Ignoring the walls’ thickness, determine the outside dimensions that will minimize a closed box’s cost if it has a square base and top, if its volume is 32 cubic meters, and if the cost per square meter for the top, bottom, and sides respectively are \$.03, \$.04, and ...

Thanks Ms.Sue

Pattern of increasing perfect squares is shown25,36-----64,81,100,what is needed to square to find the missing term,5,6,7,8.....how do I find the answer.

Math
Gracie pattern of increasing perfect squares is shown 25,36,-------,64,81,100. What number does she need to to square to find the missing term? 5, 6,7,8

math
73. Cell Phone Plan A cell phone plan costs \$3.95 per month plus \$0.07 per minute. (Assume that a partial minute is not rounded up.) (a) During July, a person talks a total of 50 minutes. What is the charge? (b) Write an equation in slope–intercept form that gives the mon...

isn't the degree of 40 already given though? Why don't you do 12sin40?

A baseball is thrown at an angle of 40.0° above the horizontal. The horizontal component of the baseball’s initial velocity is 12.0 meters per second. What is the magnitude of the ball’s initial velocity?

A baseball is thrown at an angle of 40.0° above the horizontal. The horizontal component of the baseball’s initial velocity is 12.0 meters per second. What is the magnitude of the ball’s initial velocity?

physics
A cart has a momentum of 10. kilogram meters per second east before a collision and a momentum of 5.0 kilogram meters per second west after the collision. The net charge in momentum of this cart is ? I am not sure how to solve.

physics
A loudspeaker has a movable diaphragm (cone) that vibrates back and forth in harmonic motion to produce sound. The displacement of the cone playing a sinusoidal test tone is shown above. Find the following values from the graph. (NOTE: t = 0.03 sec, and the vertical axis of th...

physics
A horizontal spring mass system is set up to keep time so that it goes from one side to the other in 6 seconds. The mass used in this system is 0.69 kg. The distance from one side to the other is 2.4 m. What spring constant should be used if it is to oscillate correctly? k = N...

physics
A pendulum and a mass spring system are both undergoing simple harmonic motion on Earth (use g = 10 N/kg). It is observed that every time the pendulum goes back and forth, the spring has gone up and down 14 times. If the pendulum has a length of 5 meters and the mass is 100 g,...

airthmetic progression
If m, n are natural numbers, m > n, sum of mth and nth term of an increasing AP is 2m and their product is m^2–- n^2, then what is the (m+n)th term of the A.P.?

Math
Rick's car gets 29.7 miles per gallon on the highway.If his fuel tanks hold10.45 gallons,then how far can he travel on one full tank.?

Math
Rick's car gets 29.7 miles per gallon on the highway.If his fuel tanks hold10.45 gallons,then how far can he travel on one full tank.?

Chemistry
In a reaction between methane, CH4 and chlorine, Cl2 four products can form: CH3Cl, CH2Cl2 + CHCl3 and CCl4. In a particular instance, 20.8 g of CH4 were allowed to react with excess Cl2 and gave 5.0 g CH3Cl, 25.5 g CH2Cl2+ and 59.0 g CHCl3+ all the CH4 reacted. a)How many gra...

Chemistry
In an experiment a student allowed benzene C6H6, TO REACT WITH EXCESS BROMINE BR2, in an attempt to prepare bromobenzene C6H5Br. This reaction also produced as a by-product, dibromobenzene, C6H4Br2, On the basis of the equation. C6H6 + Br2 -> c6h5Br + H Br a)What is the max...

math
tom had 7/8 of a cup of lemon juice.after making a pie he had 1/2 cup of lemon juice left.how much lemon juice did he use in the pie?

math
a giant truck use tires with a diameter of 12.5 feet, find the area of a wheel with this tire.

math
jones bought 3 1/8 pounds of candies, she gave away 3/5 of the candy,how much candy was left over?

math
tomatoes are selling for \$1.95 per pound.can you buy 2 1/4 pounds if you only have \$ 4.00?

Science
When light passes into the eye, what is it focused by? Is it the cornea and pupil or the retina and cornea? Please help thankss

Science
Mirror images are formed by light from the object's right side reflecting from the right side of the mirror and light from the object's left side reflecting from the left side of the mirror. True or False please help! thanks

Science
Which statement about scientific question is true? a. Scientific Questions should avoid bias or b. Scientific Questions should be as general as possible

geometry
In a triangle ABC,right angled at B, BD is drawn perpendicular to AC. prove that: (i) angle ABD = angle c (ii) angle CBD = angle A

geometry
In a triangle ABC , the internal bisectors of angles B and C meet at P and the external bisectors of the angles B and C meet at Q. prove that: angle BPC + angle BQC = 2 rt. angles.

math
In a triangle ABC , the internal bisectors of angles B and C meet at P and the external bisectors of the angles B and C meet at Q. prove that: angle BPC + angle BQC = 2 rt. angles.

math
In a triangle ABC,right angled at B, BD is drawn perpendicular to AC. prove that: (i) angle ABD = angle c (ii) angle CBD = angle A

Calculus
Determine the work done by force f=[1,4] in newtons for an object moving along the vector d =[6,3] Okay i found the vector equation and then the parametric and now i have no clue what do please help :) One more thing there a question that say given the graph f(x) sketch a grap...

Calculus
Thank you!!!

Calculus
The product of 2 positive numbers is 48. find the value of the numbers if the sum of one of the numbers and the cube of the other is a minimum.

physics
a machine gun fires 10 bullets persecond into a target. each bullet weights 20 gm and had a speed of 1500 m per second .find the force neccessary to hold the gun in posotion?

math
suppose you had \$1.76 in dimes and pennies. What is the fewest number of coins you could have? What coins are they?

math
suppose you have 43 coins, all dimes and pennies that totals \$2.68. How many of each coins do you have?

math
write each measurement first in centimeters only and then in meters only 6m 80cm how do i go about this please?

geometry
Jim has put a fence along the side AC of the triangular patch of land shown below. A right angle triangle ABC is shown having length of one leg equal to 6 meters. The measure of angle ABC is 90 degrees. A fence is shown on the hypotenuse of the triangle. The length of the fenc...

Chemistry
Ohh~ Thanks! I got it now! So it's going to be 21 x 2.0 x 10^23 = And so I got 4.2 x 10^24 atoms (:

Chemistry
How many atoms are present in a sample of 2.0 x 10^23 molecules of C7H5(NO2)3? Do you use Avogadro's Number? And please show work.. :)

College Algebra
Here is the whole question... I have figured most of it out but I need help with part (b)(f) and (g)... Maybe you also check the work I have already done Given the following function, find: (a) vertex, (b) axis of symmetry, (c) intercepts, (d) domain, (e) range, (f) intervals ...

College alg
Analyze the graph of the following function as follows: (a) Find the x- and y-intercepts. (b) Determine the end behavior: find the power function that the graph of f resembles for large values of |x|. (c) Find the maximum number of turning points. f(x)=x^2(x+2)

College Algebra
Given the equation x^2+y^2-8x-6y=0 (a) Write the equation in standard form. (b) State the center, radius, and intercepts.

college alg
Find (a) the equation of a line that is parallel to the given line and includes the given point, and (b) the equation of a line that is perpendicular to the given line through the given point. Write both answers in slope-intercept form. y = -4x + 2, (5, 4)

college algebra
Solve the exponential equation. Express your solutions in exact form only. Please show all of your work. 3^x-70*3^-x=9

maths
in a common coding method each of the letters of the alphabet is replace by the number denoting its usual place in alphabetical order, a bird is then encoded by multiplying the number representing the letter of the word. find an english word that is encoded as 120175?

maths
i am trying to solve 4/x-2>5. i use calculator and mistakenly type of digit if other than 5. when i type in the problem ,so i get the wrong solution my answer was 2<x<y. what did i mistakenly type in?

maths
kelvin and smith are incharged of counting people who gets of the lift they turn riding to floor an dback down counting as a go sfter two such trips each morning and two in evening their is an avarage taken the hotel manager wants tono the days avarage (a) on smith noor trips ...

math
how do you find ratios?

math
a runner time in the 100 meter dash is 32second when rounded to the nearest whole number. Name the fastest and slowest time in decimal to hundredths.

math
to compare3/8 and 9/16 what equivalent fraction could you find?

chemistry
frame 20 hcl

Trigonometry
jkjkkllklkgjsin cos

math
what shape has only one square corner and is not a triangle?

lotto 5/90 maths
Winning Machine 55 44 16 38 24 - 37 62 65 90 29 12 70 16 65 74 - 25 83 57 46 80 37 69 72 14 8 - 86 40 22 6 24 what game will this 1st to 3rd week produce for 4th and 5th week winning

Lotto 5/90 maths
37 69 72 14 8 - 86 40 22 6 24 what number will this game produce

Lotto 5/90 maths
35 7 85 33 40 - 60 74 25 19 2 what will this game produce for the next lotto game

Trigonometry
Pls tell me how to find out sin70.Pls

algebra
(x^2 + 3) ^2

algebra
X2 [X to the second square]- 5x+1 2x-3

the lagrange multiplier equation
A cylindrical oil-storage tank is to be constructed for which the following costs apply: cost per square meter metal for sides \$30.00 (cost per square meter) combined costs of concrete base and metal bottom \$37.50(cost per square meter) top 7.50 (cost per square meter) The tan...

Chemistry
Suppose a student is measuring the optical rotation of a 1 M sample of (S)-(-)- Limonene. The path length is 13cm. What optical rotation should the student expect to measure?

Math
A girl earns \$6.00 an hour when she works Monday through Friday and \$9.00 an hour on Saturday. Last week, her salary was \$273 for 42 hours of work. How many hours did she work on Saturday?

math
how can i use the fact 11*5 =55 to solve 11* 6?

math
thanks

math
HUH ???

math
how can I use the fact 11*5=55 to solve 11*6?

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