
Precalculus
A ball is thrown from an initial height of 1 meter with an initial upward velocity of 9 m/s. The ball's height h (in meters) after t seconds is given by the following h=1+9t5t^2 Find all the values of the t for which the ball's height is 4 meters.
asked by Lucie on July 2, 2017 
algebra
an isosceles triangle is one in which two sides are the same length. The perimeter of an isosceles triangle is 36cm if the length of the congruent sides is 4 times the length of the third side, find the dimentions of the triangle
asked by Mia on February 12, 2015 
algebra
the length of a rectangle is 5 times its width. if the length is decreased by 3 meters, and the width is increased by 10 meters, the perimeter will be 374 meters. find the length of the original rectangle.
asked by kaitlyn on November 14, 2016 
Algebra 2
Find the A) Constant of Variation, B) the Equation of the Variation, and the C) the Solution The volume V of gas varies inversely to the pressure P. The volume of a gas is 200 cm^3 under pressure of 32 kg/cm^2. What will be its volume under pressure of 40
asked by Nate on February 15, 2018 
geometry
A design on the surface of a balloon is 5 cm wide when the balloon holds 71 cm^3 of air. How much air does the balloon hold when the design is 10 cm wide? Explain the method you use to find the amount of air.
asked by Emi on February 4, 2015 
Geometry
A design on the surface of a balloon is 5 cm wide when the balloon holds 71 cm of air. How much air does the balloon hold when the design is 10 cm wide? Explain the method you use to find the amount of air.
asked by Alex on September 15, 2015 
math
in a lab experiment 8 grams of acid were produced in 28 minutes and 17 grams in 47 minutes. Let g be the number of grams and m be the number of minutes. Find a linear equation that you could use to calculate g for any number of minutes
asked by Anonymous on February 3, 2014 
Chemistry
A compound contains only potassium and iodine. A sample weighing 12.3 g of this compound contained 2.90 g of potassium. How many grams of iodine would there be in another sample of this compound containing 9.56 g of potassium? Do I find the mol of each
asked by Madoo on October 6, 2014 
Maths
if area of rectangular plot is 1250 sq cm. a smaller rectangular plot with area 1/5 of the total area and length is 7 times of its breath, find the perimeter of the smaller plot
asked by xyz on October 2, 2015 
math
you can rent a car for the day from company A for $26 plus $0.12 a mile company B charges $24.00 plus $ 0.19 a mile. Find the number of miles m (to the nearest mile) per day for which it is cheaper to rent from company A
asked by Jasmine on June 5, 2015 
math
In a lab experiment 8 grams of acid were produced in 28 minutes and 17 grams in 47 minutes. Let g be the number of grams and m be the number of minutes. Find a linear equation that you could use to calculate g for any number of minutes
asked by britney on February 3, 2014 
calculus
In a lab experiment 8 grams of acid were produced in 28 minutes and 17 grams in 47 minutes. Let g be the number of grams and m be the number of minutes. Find a linear equation that you could use to calculate g for any number of minutes.
asked by britney on February 2, 2014 
geometry
A design on the surface of a balloon is 5 cm wide when the balloon holds 71 cm^3 of air. How much air does the balloon hold when the design is 10 cm wide? Explain the method you use to find the amount of air.
asked by Emi on February 4, 2015 
algebra
a load of 8 kg attached to the bottom of a coil spring stretches the spring to a length of 76 cm and a load of 14 kg stretches it to a length of 85cm. find the natural(unstretched)length of the spring
asked by Anonymous on October 6, 2014 
adv function
an unknown polynomial f(x) of degree 32 yields a remainder of 1 when divided by x1 and a remainder of 3 when divided by x3, find the remainder when f(x) is divided by (x1)(x3). What is the answer? and i was wondering if the part about the polynomial
asked by AA on October 4, 2016 
math statistics
A machine has 9 identical components that function independently. The probability that a component will fail is 0.2. The machine will stop working if 1 or 2 components fail. Find the probability that the machine will be fail?
asked by ANOMY on March 28, 2018 
Algebra 2
The braking distance of a car varies directly as the square of the speed. If braking distance of a certain car is 49 feet at 30 mph, find the approximate braking distance at 65 mph
asked by jazzy on January 17, 2017 
physics
A cart starts from position one with a velocity of 17.0 m/s. Find the speed of the cart at positions 2 and 3 ignoring friction. will the cart reach position four? position 2= 12.0 m high position 3= 2.0 m high 4= 20.m high
asked by Ali on October 26, 2010 
Math
the sum of the ages of rex, ben and alfred is 36 years, two years ago, ben was 3 times as old as rex was then, 8 years from now, alfred will be twice as old as ben will be then. find their present age.
asked by Anonymous on September 29, 2015 
Algebra 2
Slips of paper with the numbers one through 20 are placed in a hat. If a slip of paper is pulled out of the hat and discarded and then another slip of paper is picked find the probability of both numbers will be greater than 18 or both numbers will be less
asked by Anonymous on February 23, 2016 
Math
the sum of the ages of rex, ben and alfred is 36 years, two years ago, ben was 3 times as old as rex was then, 8 years from now, alfred will be twice as old as ben will be then. find their present age.
asked by arianne on September 29, 2015 
Math
The area of a triangular sail (for a sailboat) is 30 meters squared. If the height of this triangular sail is two less than twice the length of the base, find the dimensions ( height and base ) of the triangular sail.
asked by Anonymous on May 9, 2017 
Astro
Suppose you lived on a planet with the same radius as the Earth, but it had a density 2.99 times Earth's density. Your weight would be different on this planet. Find how much you would weigh on this planet divided by your weight on Earth
asked by John on March 27, 2012 
Algebra
Amy has some money in her checking account. If she writes a check for $40.50, her checking account will be overdrawn by $21.50. Find how much money is Amy’s checking account now. My Answer (please correct if wrong): 40.5  (21.50) = x
asked by Katelyn on September 24, 2017 
math
tracy is 7 times as old as heather. if let x be the age of heather now. If in five years time , tracy will be four times as old as heather, write an equation involving x and solve it to find what tracy's age is now.
asked by lala on May 13, 2017 
maths
a trapezium with its parallel sides in the ratio16:5,is cut from a rectangle whose sides measure 63m &5m respectively. the area of the trapezium is 4/15 of the rectangle .find the lengths of the parallel sides of the trapezium.
asked by YASH on June 3, 2011 
statistics
the heights of 1000 students in a college are normally distributed with a mean 5’10" and SD 2". Use 68% for the region from the mean to 1SD on either side; 94% for the region from the mean to 2SD on either side and 98% for the region from the mean to
asked by hr on March 31, 2010 
Maths
The question is find the common factors of 12x, 36 When we solve it ; 12x =2×3×2×(×) 36=2×3×2×3 Common factors 2 , 2 and 3 then why fo we multiply the these numbers *in my book the answer is 2×2×3 =6 ( the question says common factors not hcf )
asked by Jess on October 11, 2016 
math
how would you show his problem as a bar model A box of chalk and 2 staplers cost $10.3 boxes of chalk and 2 staplers cost $18.Find the total cost of 1 box of chalk
asked by anna on September 7, 2016 
maths
a trapezium with its parallel sides in the ratio16:5,is cut from a rectangle whose sides measure 63m &5m respectively. the area of the trapezium is 4/15 of the rectangle .find the lengths of the parallel sides of the trapezium.
asked by YASH on June 2, 2011 
Math
The wingspan of a Boeing 747400 is 64.4 metres. a. If a scale model is built to the scale 1:20, what would the wingspan of the model be in centimetres? b. If the wingspan of another model is 53 cm, find the scale of the model in the form 1:x.
asked by Tiffany on September 11, 2016 
math
A Glass Of Water Is Being Filled With Water At The Rate Of 12 Pi Cm^3/sec And the radius of the top is 6 cm and the radius of the base is 3 cm and the height of the glass is 12 cm , find A) dh/dt and B) radius when the height of water is half?
asked by jack on August 11, 2011 
Math/Algebra
A bridge is built in the shape of a semi elliptical arch. It has a span of 96 feet. The height of the arch 29 feet from the center is to be 10 feet. Find the height of the arch at its center.
asked by Student on May 28, 2013 
Mathematics question
Three pieces of fruit have an average weight of m grams. After another piece of fruit is added, the average weight doubles. Find the weight of the extra piece of fruit in terms of m.
asked by Rick on August 18, 2017 
math
20 men can do a piece of work in 24 days. After working for 6 days, additional men are employed to finish the work in 21 days from the beginning. Find the number of additional men
asked by saurav on March 19, 2015 
Math
In 500cmcube of alcohol solution the percentage of alcohol by volume is 80%. Find the volume of water that must be added to the solution so that the ratio of the volume of alcohol to that of water becomes 5:2? Please some one give me answer
asked by Mani on November 18, 2012 
Acct.101
Post to the account Stock Investments. Common Stock Shares Cost Co.A 1,980 $91,080 Co.B 4,990 $44,910 Co.C 1,100 $24,200 I am trying to figure out what the stock investment amount is and to find the stock investment. Additional information Sept 1, Sold 998
asked by kay on April 12, 2015 
physics
A motorist drives along a straight road at a constant speed of 15.0 m/s. just as she passes a parked police officer,the officer starts to accelerate at 2.00 m/s^2 to overtake her. assuming the officer maintains this acceleration, a) determine the time it
asked by kevin on January 16, 2011 
Calculus 2
A culture of bacteria is growing at the rate of 20e^0.8t cells per day, where t is the number of days since the culture was started. Suppose that the culture began with 50 cells. (a) Find a formula for the total number of cells in the culture after t days.
asked by Alexis on September 18, 2016 
physics
A motorist drives along a straight road at a constant speed of 15.0 m/s. just as she passes a parked police officer,the officer starts to accelerate at 2.00 m/s^2 to overtake her. assuming the officer maintains this acceleration, a) determine the time it
asked by kevin on January 17, 2011 
Math
The floor of a round hut is 10m in diameter. A weaver charges $15.50 to make a mat to fit the floor . Find the cost of the mat per square meter . Work area of a circle = 3.1 * 5*5=77.5 Cost per square meter =77.5\15.5= 5 cents per square meter
asked by Amina on February 18, 2016 
chemistry
Please, can someone help? Evaluate log 1. This is my work up until I have gotten stuck: log 1 1=10^x I can't find a common base for 1 and 10^x. Wow, my apologies, this is algebra, not chemistry. but actually I think they use it in chemistry too... Take the
asked by Darcy on April 10, 2007 
Math
*not multiple choice* u^3 = 1/125 y  1 = 4y  2/3 * not sure how to do this what is the y intercept of the line? y= 3x  5 * my answer is 5 when 40 is added to the number miles she ran last week..the result is the same as adding 10 to 4 times the number
asked by Anonymous on December 17, 2014 
physics
Three forces are applied to the ring of a force table,60N at an angle of 10.0 degrees, 40N at an angle of 70.0 degrees, and 50N at an angle of 100.0 degrees. Find the magnitude of the resultant and the direction by using the analytical method. What is the
asked by ramona on December 10, 2012 
Statistics
The coefficient of correlation between the age and blood pressure of a sample of 8 persons was found to be +0.8, the average age is 50 years and average blood pressure is 60. Their standard deviations were 5 and 10 respectively. a) Obtain the two
asked by Sara on January 2, 2016 
LW Magnate School Aba. Nigeria
The wooden frame of a picture is 20cm long and 16cm wide. If the wood is 1.82cm wide, find the size of the picture. My working: The picture frame= L x W = 20x16= 320cm Wood frame= 1.82*2= 3.64cm 320cm less 3.68cm = 316.36cm.
asked by Treasure on October 13, 2015 
Physics
A discus thrower accelerates a discus from rest to a speed of 25m/s by whirling it at 1.25 rev. The discus moves in circle of radius 1m. Find a. The final angular speed, b. The constant angular acceleration, c. The time interval from rest to the speed
asked by Edge on February 28, 2016 
algebra
Jane is taking a class and asks you to help her figure out what her last grade must be in the class to get a 85 in the class. She tells you the following calculation is used to find your final grade: w2d2 x is her last score which has not been taken.
asked by Jennifer on November 29, 2011 
Math probability
Assume that 60% of community college students are female. 1) if we pick 100 students at random justify why we can or cannot model this using a normal model. 2) find the probability that between 50 and 70 of the 100 students selected are female. 3) fidn Q1
asked by Katy on April 8, 2013 
physics
Two point charges of the same magnitude but opposite signs are fixed to either end of the base of an isosceles triangle. The electric field at the midpoint M between the charges has a magnitude EM. The field directly above the midpoint at point P has a
asked by shaun on February 14, 2013 
MATH!
The mass of a radioactive substance follows an exponential decay model, with a decay rate of 5% per day. A sample of this radioactive substance was taken six days ago. If the sample has a mass of 3 kg today, find the initial mass of the sample. Round your
asked by Kim on March 15, 2012 
physics
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.9 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +3.4 m/s. The
asked by chelsea on May 11, 2012 
Math ( Polynomial )
This time three questions  1. If (x^2  1 ) is a factor of polynomial ax^4 + bx^3 + cx^2 + dx + e, show that a + c + e = b + d = 0. 2. Let R1 and R2 be the remainders when polynomials x^3 + 2x^2  5ax  7 and x^ 3 + ax^2  12 x + 6 are divided by ( x + 1
asked by Jack on April 13, 2013 
Physics 111 PLEASE HELP ASAP
A 37.5kg child swings in a swing supported by two chains, each 3.05 m long. The tension in each chain at the lowest point is 433 N. the force of the seat on the child is 498.5 N. b)Find the force exerted by the seat on the child at the lowest point.
asked by lily on March 12, 2012 
physics
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of 4.5m/s, grabs him. The tackler holds onto the receiver, and and the two move off together with a velocity of 2.6m/s. The
asked by Natasha on March 12, 2012 
math
The area of a rectangular field is 2000 sq.m and its perimeter is 180m. Form a quadratic equation by taking the length of the field as x and solve it to find the length and breadth of the field. the length and breadth are A) (205m, 80m) B) (50m, 40m) C)
asked by nithin on September 1, 2014 
Linear Algebra
Help me find my error! a)Write down the equation of the plane passing through the point (1,5,7) and parallel to the lines. Line A: Line B: Point x = 3 2t x = 2  2t y = 1  5t y = 3  2t z = 2  t z = 1 + 4t Parametric equation of the plane = + t1 + t2
asked by Leo on December 6, 2018 
PHYSICS 111
A 37.5kg child swings in a swing supported by two chains, each 3.05 m long. The tension in each chain at the lowest point is 433 N. the force of the seat on the child is 498.5 N. b)Find the force exerted by the seat on the child at the lowest point.
asked by lily on March 11, 2012 
Chemistry
for a question it is given that there is 14.6 g of calcium chloride in 246 g of water. Kf is 1.86 C/m we need to find the freezing point of this solution. when i do the calculations, i get the freezing point to be 0.99 (without using the vant hoff factor
asked by Ania on November 8, 2012 
ENG102
Question 1. A car moves 26 km due east then 14 km due north. It then turns along a path running northeast with 15 km, then 17 km due west. If the time for the entire journey is 2 hrs, Find; (a) the car’s average speed in m/s (b) the car’s average
asked by DESMOND on May 1, 2012 
Math
A jar contains 5 blue marble, 8 red marbles, 4 white marbles,and purple marbles. Suppose you pick a marble at random without looking. Find the probability of each event. Choosing a blue marble, putting it back, then choosing a purple? (Simplest form)
asked by Alice on April 27, 2017 
Physics
A 2.32 kg block slide down a ramp from a height of 4.19 m. The block has a speed of 3.25 m/s when it reaches the bottom. There is friction. What is the work (in J) done by gravity? What is the work done by friction? I found the work of friction already.
asked by Jordan on October 27, 2014 
Physics
The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 5.2 m, measured from its tip to the center of the circle. Find the ratio of the centripetal acceleration a1 at the end of the blade to the centripetal
asked by Moises on October 6, 2012 
math
Jane is taking a class and asks you to help her figure out what her last grade must be in the class to get a 85 in the class. She tells you the following calculation is used to find your final grade: 75+85+90+X ___________ > 4 x is her last score which has
asked by Jennifer on November 30, 2011 
Mathematics
In the problems 1 to 3, find the present value of the given (ordinary) annuity. 1. $3500000 every 6 months for 5 years at the rate of 16% compounded semiannually. 2. $7000000 per month for 10 months at the rate of18% compounded monthly. 3. $1700000 per
asked by Gibbons on June 22, 2010 
Math ( Polynomial )
This time three questions  1. If (x^2  1 ) is a factor of polynomial ax^4 + bx^3 + cx^2 + dx + e, show that a + c + e = b + d = 0. 2. Let R1 and R2 be the remainders when polynomials x^3 + 2x^2  5ax  7 and x^ 3 + ax^2  12 x + 6 are divided by ( x + 1
asked by Jack on April 13, 2013 
calculas
Use left and right endpoints and the given number of rectangles to find two approximations of the area of the region between the graph of the function and the xaxis over the given interval. (Round your answers to four decimal places.) g(x) = 7 sin x, [0,
asked by Sam on May 7, 2016 
physics
Consider a long wire where the current density is not uniform but instead increases as you approach the center of the wire, so that at a distance r from the center the current density is J(r)= I/ 2PiRr. Find the magnetic field strength both inside and
asked by Jessica on April 8, 2008 
science
A soccer ball is kicked with an initial speed of 8.4 m/s in a direction 22.0° above the horizontal.Find the magnitude and direction of its velocity at the following times. (Take the +x axis to be parallel to the ground, in the direction that the ball is
asked by Caitlin on August 10, 2012 
Calculus
find the equation for an ellipse that satisfies the following condition Vertices at (3,1) and (9,1) one focus at (7,1) I will assume you know the general equation of an ellipse and its properties in terms of a,b and c. the centre would be the midpoint of
asked by Kelly on April 14, 2007 
chemistry
When 0.558g of biphenyl (C_12H_10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.7^\circ C to 30.1^\circ C. Find DeltaE_rxn for the combustion of biphenyl in kJ/mol biphenyl. The heat capacity of the bomb calorimeter, determined
asked by savannah on December 19, 2012 
3rd grade social studies
where can i find some good information on christopher columbus for a good report. http://en.wikipedia.org/wiki/Christopher_Columbus and http://www.columbusnavigation.com/ and http://www.ibiblio.org/expo/1492.exhibit/cColumbus/columbus.html =) thanks
asked by zeke on December 5, 2006 
Math
A standard deck of playing cards contains 52 cards in four suits of 13 cards each. Two suits are red and two suits are black. Find each probability.Assume the first card is replaced before the second card is drawn. 1.P(black,queen) 2.P(jack,queen) How
asked by Shadow on February 10, 2010 
static
The coefficient of correlation between the age and blood pressure of a sample of 8 persons was found to be +0.8, the average age is 50 years and average blood pressure is 60. Their standard deviations were 5 and 10 respectively. a) Obtain the two
asked by moon on January 2, 2016 
physics
In a football game, a receiver is standing still, having just caught a pass. Before he can move, a tackler, running at a velocity of +4.4 m/s, grabs him. The tackler holds onto the receiver, and the two move off together with a velocity of +2.9 m/s. The
asked by bam on November 6, 2013 
Physics
A 23.0 kg block is initially at rest on a horizontal surface. A horizontal force of 80.0 N is required to set the block in motion. After it is in motion, a horizontal force of 57.0 N is required to keep the block moving with constant speed. Find the
asked by Maria on November 2, 2010 
math,correction
Is this correct or no. I need help in a couple of problems can someone explain them to me. Problem#1 directions: Factor each expression a^2(bc)16b^2(bc) My answer is: (bc)(a4b)(a+4b) PROBLEM#2 dIRECTIONS: Find a value for k so that 2x^3kxy^2 will
asked by jas20 on February 24, 2007 
maths
Let ABC be a triangle in the plane. Find circles C0;C1; : : : ;C6 such that Cj has exactly j points in common with the boundary of ABC (this \boundary" consists of the line segments AB, BC, CA). Is it possible to nd a circle C7 with 7 points in common with
asked by jenny on October 12, 2012 
Math
One calling plan offers long distance calls for .03 per minute. Another plan costs $2.00 per month but offers long distance service for 0.01 per minute. Write and solve an equation to find the number of long distance minuets for which the two plans would
asked by Bryan on November 6, 2012 
Math
The charge for telephone calls T,is partly constant and partly varies with the number n of units of call.The bill for 580 units of call is #900, while the bill for 310 units is #500.a.obtain the charge per unit of call.b find a formula for T.
asked by Precious on August 28, 2019 
math
i need some serious help with limits in precalc. here are a few questions that i really do not understand. 1. Evaluate: lim (3x^32x^2+5) x> 1 2. Evaluate: lim [ln(4x+1) x>2 3. Evaluate: lim[cos(pi x/3)] x>2 4. Evaluate: lim x^2+x6/x^29 x> 3
asked by Dani on July 13, 2010 
geometry
the perimeter of a triangle is 59 inches. the longest side is 11 inches longer than the medium side, and the medium side is 3 inches more than the shortest side. Find the length of each side.
asked by Jess on May 4, 2010 
Maths (quadratic equation) need help
In an unknown fraction the denominator is one more than twice the numerator. When 2 1/10 is added to this fraction, the result is equal to the reciprocal of the unknown fraction. Find the unknown fraction. (Hint; the the numerator of the fraction to be the
asked by Danny on May 31, 2016 
precalculus
Find the inverse of the function below. Graph the function below and the inverse function. Determine the domain, range, and asymptotes of the function below and the inverse function. Please show all of your work. and graph. f(x)=e^x/2+4
asked by tonia on November 11, 2011 
Math
Help with these problems would be greatly appreciated: 1.Find the definite integral of dx/(x(1+ln(x))from e^6 to 1. 2. Solve for x in terms of k for log[2,x^6)+log[2,x^10=k. (its log base 2) 3.Solve log base 3(log base 3, x)=2
asked by Angelina on January 30, 2009 
physics
A person holds a ladder horizontally at its center. Treating the ladder as a uniform rod of length 3.55 m and mass 10.31 Kg, find the torque the person must exert on the ladder to give it an angular acceleration of 0.406 rad/s2. Should I set the given
asked by anne on June 4, 2007 
math
Find the total number of compounding periods and interest rate per period. Princial: $700, time period :8yrs , nomial rate: 1.5%, interest compounding :monthly, copounding amount________, compound interest_______ * i need to figure outhe compounding
asked by Anonymous on June 4, 2014 
calculus
A box is constructed out of two different types of metal. The metal for the top and bottom, which are both square, costs $4 per square foot and the metal for the sides costs $4 per square foot. Find the dimensions that minimize cost if the box has a volume
asked by saud on November 11, 2011 
geometry
The perimeter of an isosceles triangle is 37 in. The lengths of the two equal legs are 6 in. less than 3 times the length of the base. Find the lengths of the three sides. 37=2L+2W W=3W6 do i have this equation wrote right when i try to solve it the
asked by carry on April 18, 2007 
physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 32 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 140 m), the block swings toward
asked by Fred on October 23, 2010 
Maths
Eight coins are tossed at a time,256 times Number of heads observed at each throw is recorded and the results are given below. Find the expected frequencies What are the theoretical values of main and standard deviation? Calculate also the mean the S.D. of
asked by Naveen on December 9, 2011 
physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 26 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 135 m), the block swings toward
asked by ZAC on October 6, 2010 
Quantum mechanics, eigenfunctions!
Determine if the function sin(x)*e^(ax) where a=constant is an eigenfunction of the operators d/dx and d^2/(dx)^2 Okay. My understanding is that you use the operator and perform its "thing" on the function. In this case, you will have to find the 1st
asked by Steven on October 8, 2009 
Physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 27 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 180 m), the block swings toward
asked by Julius on March 5, 2011 
College Physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 29 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 135 m), the block swings toward
asked by Dawn on October 2, 2010 
physics
Two blocks, of weights 2.8 N and 5.5 N, are connected by a massless string and slide down a 47° inclined plane. The coefficient of kinetic friction between the lighter block and the plane is 0.087; that between the heavier block and the plane is 0.39.
asked by Ted on October 23, 2011 
Math
A boy is trying to find the height of a tree. When he stands 95.5 metres away from the tree (the distance D in Figure 2) the angle shown as è in Figure 2 is 31.5°. The boy’s eyes are 1.15 m from the ground (h in Figure 2). What is the height of the
asked by Jack on May 5, 2016 
Math
Freddy and his friends write their names in code. Each friend's name is represented by a number. To identify the friend in a message, you must find the prime factorization of the number. Freddy gets a message from 45. Who is the message from. Secret Code:
asked by Cons on June 21, 2017 
Physics
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 20 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 165 m), the block swings toward
asked by Moises on October 6, 2012 
math
A uniform ladder of length 2a and mass m lies on a vertical plane with one end against a smooth vertical wall,the other end being supported on a horizontal floor. The ladder is released from rest when inclined at an angle Q to the horizontal. Find the
asked by nilufar on June 27, 2011
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