# Posts by Daniel

Total # Posts: 1,111

**math**

Let the side be x and the height h. Then x^2+4xh=48 and h=(48-x^2)/(4x). Now we have an expression for the volume in x: V(x)=x^2h=x^2*(48-x^2)/(4x)=12x-x^3/4. Taking the derivative we get V'(x)=12-3/4x^2=0. The volume is maximal when V'(x)=0 so 12-3/4x^2 and the ...

**furthermaths**

The kth number kan be written a1+(k-1)d, d difference. The sum of the ten first is a1+a1+d+a1+2d+a1+3d+…+a1+9 and by looking at the a1 and d separately we get 10a1+(1+2+3+…+9)d=10a1+(9*10)/2=10a1+45d=60 using an arithmetic sum. Similarly, we get for the other sum ...

**math**

Use prime factorization: 144=12^2=3^2*2^4, 96=2^5*3 and 0.36=9/25=3^2/5^2 so 144x96/0.36=(3^2*2^4*2^5*3)/(3^2/5^2) and multiply by the reciprocal (3^2*2^4*2^5*3)*5^2/3^2=2^4*2^5*3*5^2=2^9*3*5^2=38400. Answer: 38400

**Math**

2/5*1/5 and 3/4*1/2.

**MATH I just need explanation very easy ( for you)**

We want to solve x^2+3x+2=0. We already have 0 alone so we don't need to subtract anything, but of course we can subtract LHS from RHS and get -x^2-3x-2=0 but that is the same as just multiplying both sides in the equation with -1 which is of no help. The idea of ...

**Algebra**

It is hard to understand what you mean without parentheses but the way I see it A can be simplified since sqrt 4 = 2 and C can be written as x^2-sqrt (3yx^2). So B and D are simplified.

**maths**

a bicycle wheel has a diameter of 42 cm.how many revolutions will it make to cover a distance of 13.2km

**math**

A man seated on a chair has a mass of 85 kg. Known that the mans weight is distributed so the chairs back legs support twice as much as the front legs. What is the mass taken by each leg?

**physics the Rang**

U2 Sin 2a =g =34.66m

**physics projectile**

The speed of projection is 40m/s upward.The negative value gives the speed at which the dody again arrives at the level of projection

**Calculus plz help!!!**

Integrate:Root(1+root(x))/x

**Algebra help help!!!**

Algebra 4^x-3^(x-1/2)=3^(x+1/2)-2^(2x-1)....... Plz help me

**Reposting chemistry help!!!**

A metal x forms two different chloride.if 12.g of chloride A and 16.3g of chloride B contain 7.1g and 10.7g of chlorine respectively,show that the figure agree with the laws of multiple proportions.write there formulea plz i need the working.....

**Calculus help!!!**

X^2y+sinxy=e^xy i need solution plz

**Chemistry chlorine plz help**

A metal x forms two different chloride.if 12.g of chloride A and 16.3g of chloride B contain 7.1g and 10.7g of chlorine respectively,show that the figure agree with the laws of multiple proportions.write there formulea plz i need the work....no hint plz

**MATHS**

Line AB has the equation y= ¼x + 6 write down the gradient of a line that is Parallel to line AB and perpendicular to line AB (2×1=2)

**Math**

Solve the system using elimination. 10y − 2x = 50 6x − 3y = 12 A. (5, 6) B. (2.1, 0.2) C. (2.1, 4.6) D. (6, 5)

**french(le passe compose)**

i went home last week He helped me with my homework I visited him yesterday

**math**

What is the are of 18ft 18ft 4ft 3ft 3ft

**Physics**

Hmmm

**Physics college**

A particle is thrown from the origin of the frame xOy at the moment t = 0, with speed v0 at a certain angle b from the Ox axis. At the same moment another particle begins to fall freely from a wall with height h, situated at the distance d. Air resistance is neglected. Find ...

**Physics help**

Find the differential equation of motion for a gravitational pendulum of mass m and length a by using the fact that the torque of its weight relative to the point of suspension is equal to the time derivative its angular momentum. Solve this equation to obtain the equation of ...

**physics**

a spring of force constant 1500N/m is acted upon Hy a constant force of 75N .calculate the potential energy stored in the spring

**MEKELLE**

Arrange increasing rates of diffusion H2 CO CO2 N2 He O2 SO2

**Math**

5+3+2+4+40·1-1/8

**Calulus**

Fundamental Theorem of Calculus 1. (4e^x-3)dx plus the number in x (6,1)

**Calulus**

Consider the function y = 2x^3-3x^2+9x+5. 1. Find where the function is increasing, where the function is decreasing, and calculate all relative extrema (local max and local min) 2. Find where the function is concave up, where the function is concave down, and find the ...

**Calulus**

You have 300 square feet of wood you will use to construct a rectangular shed with a square base and top. What is the maximum volume of your shed? Optimization Question

**Calculus**

As an ice cube melts its surface area in decreasing at a rate of 6 cm^2 / sec. Find the rate at which the length of each side is decreasing at the moment when each side has length 2 cm.

**Physics**

A natural gas power plant burns natural gas to produce electricity. In one second it produces 500 MJ of electrical potential energy. The power plant consumes chemical energy in order to produce electrical potential energy. --In one second does it consume 500 MJ of chemical ...

**Physics**

A person slides down a slope. At the end of their slide they are brought gently to rest by a large spring. Friction on the slope cannot be ignored. Draw an energy bar chart for this situation. Define your system any way you want, but clearly state how you have defined your ...

**Math**

A river flows at the speed of v from west to east. How should a man who is at a point A of the southern bank of the river, which is d meters away from the river, and wants to reach a point B on the northern bank of the river, which is 2d meters away from the river, choose his ...

**geometry**

Let $\overline{PQ}$, $\overline{RS}$, and $\overline{TU}$ be parallel chords of a circle. The distance between chords $\overline{PQ}$ and $\overline{RS}$ is 4, and the distance between chords $\overline{RS}$ and $\overline{TU}$ is also 4. If $PQ = 78$ and $TU = 50$, then find...

**Algebra**

wwas this right

**Physics**

As usual, a drag coefficient of 0.5 is a reasonable guess. A cyclist going at a steady speed is mostly working to keep drag from slowing them down (rolling friction plays a part but is much smaller). Estimate what the power output is of a cyclist going at 40 km/hr.

**Algebra 1- Just one question please :)**

Was this right @basketball&batman

**Math**

A strees light L hangs H feet above a flat straight street. A person h feet tall at point O directly under the street light at time t=0 seconds, moves in a straight line along the street a v feet/second. If H=20 feet, h=6 feet, and v=4 miles per hour, find the velocity v of ...

**Math**

A spherical balloon expands uniformly as it is inflated. The radius of the balloon in r meters at time t seconds. Find the radius, the volume, and the surface area of the balloon when the rates of increase of the surface area of the balloon and the radius are numerically equal

**Math**

After school, Laura baby sits a neighbor's child for 50 minutes. They rest for 10 minutes,read for 15 minutes,and play the rest of the time. Write the total baby sitting time, the resting time and reading time, as fractions of an hour.

**Math/Fractions**

After school, Laura baby sits a neighbor's child for 50 minutes. They rest for 10 minutes,read for 15 minutes,and play the rest of the time. Write the total baby sitting time, the resting time and reading time, as fractions of an hour.

**Math**

4/10 of a mile from Jose's house to the school.

**Math**

Shawn rides his bicycle 9/10 mile to school. On his way to school, he stops at Mike's house, which is 1/5 mile from Shawn's house. Then they both ride to José house, which is 2/7 mile from Mike's house. How far is it from Jose's house to the school?

**Math**

Suppose that a cyclist began a 510 mi ride across a state at the western edge of the state at the same that a car traveling toward it leaves the eastern end of the state if the bicycle and car met after 8.5 hr and the car traveled 33.4 mph faster than the bicycle find average ...

**Math**

Suppose that a cyclist began a 450 mi ride across a state at the western edge of the state, at the same time that a car traveling toward it leaves the eastern end of the state. If the bicycle and car met after 7.5 hr and the car traveled 30.4 mph faster than the bicycle, find ...

**College Physics**

a man pushes a lawn mower 50 feet in 5 second by exerting a force of 30 pounds at an angle of 53 with the horizon. find the work done and the average power expended?

**College Physics**

a man pushes a lawn mower 50 feet in 5 second by exerting a force of 30 pounds at an angle of 53

**Physics**

3. A low friction cart (similar to what you use in the lab) collides with a second low friction cart. Cart A has a mass of 0.500 kg and cart B has a mass of 0.750 kg. Glider A was moving at 40.0 cm/s before the collision. Glider B was at rest. (a) The carts have velcro on them...

**Physics**

One end of a spring is attached to the ceiling. The unstretched length of the spring is 10.0 cm. A 2.0 kg mass is hung from the other end of the spring. It is slowly lowered until it comes to rest. At this point the spring is 15 cm long. (a) What is the stiffness (spring ...

**math fractions**

Sherry spent 1/5 of her money on school supplies and 3/8 of the remainder on a CD player. She had $25 left. How much money did she have at first? do not use algebra

**Algebra**

right/

**History vocabulary**

I have looked every where. I am in honors 7th grade history. Help please I need a sentence with the word mullah and jihad?

**Physics**

A car is traveling North. In which direction are the wheels turning. This is under the torque chapter

**Physics**

A car is traveling North. In which direction are the wheels turning. This is under the torque chapter

**chemistry**

2.17kcal

**physics**

There is a car turning on an unbanked road. The mass of the car is 2000kg moving at constant speed 36mph. The radius of the unbanked curve is 100m. the driver sees an obstacle at 20m ahead along the curve. he presses the brakes and expects to have a constant deceleration along...

**MATH**

One half of a number minus 9 is 14

**St Eugene university**

Solve x^2 times second derivative -3x times first derivative -5y =sin(logx) my solution is integrating both sides we have sinxlogx

**physics**

A ball starts at the top of a ramp with an incline of 7 degrees and rolls down, picking up speed. (see the table below) Time (s) Position (m) 0 0 .4917 .1 .7625 .15 .975 .3 1.1583 .45 1.2833 1.6467 (a) Linearize the data and find the slope of the new line. [Slope=.3745?] (b) ...

**biology**

what is the difference between an exergonic reaction and an endergonic reaction?

**Ap world history**

lack of wars

**Chemistry**

1. What volume of nitric acid solution with mass fraction of 16% is required to make make 250ml solution with 0.2mole/l?

**Political Science**

Does the representation system in the U.S. Senate still make sense today? Why or why not?

**Political Science**

Develop an argument for a strong national government, or for greater state sovereignty and independence.

**PHIL324L**

reinterpreting motives

**English**

There should be more pe taught in school each week - rhetorical question

**chemistry**

M1V1=M2V2 M*25= 0.0619*38.9 = MHCl= 2.408/25 MHCl= 0.0963 M

**solving two-step inequality**

Translate the following inequality into written language. 5x-6<14

**Math**

12 hours

**chemistry**

Can methane and oxygen be separated. If yes, can anyone please mention the method

**Physics**

28.8 m/s

**Statistics**

A particular fruit's weights are normally distributed, with a mean of 353 grams and a standard deviation of 6 grams. If you pick one fruit at random, what is the probability that it will weigh between 334 grams and 344 grams?

**Math**

9121518

**Physics**

A ball rolls off the edge of a 0.75m high lab table with a horizontal speed of 1.50 m/s. Calculate the time that the ball is in flight, calculate the vertical velocity of the ball just before striking the floor, and calculate the horizontal distance(range) that the ball will ...

**Algebra 2 math**

In triangle GHI, angle H is a right angle, GH = 40, and cos G= 40/41. Draw a diagram and find each value in fraction and in decimal form. a) Sin G b. Sin I c. Cot G d. csc G e. cos I f. sec H - I have no idea how to do this

**age question**

A man is 24 years when his son was born. Now he is three times as old as his son. Find the age of the son.

**Social Studies**

Not to be rude or anything

**Social Studies**

I don't really know why it is that that answer was right, I just know that it was right.

**Social Studies**

Lol I accidentally submitted it and got it right. Its D. Its industrial Base

**Social Studies**

What was one of the main advantage of the South? A.) A small population of free men B.) The Strong support of its white population C.) Its belief in states' rights D.) Its industrial base I think its either C or D

**Physical science**

Nail polish fist and water second spirit is third and ethanol is last

**Literacy**

10 facts about sugar from Belize

**Geology**

Rank the following three types of sedimentary rocks in terms of rate of sedimentation from highest (1) to lowest (3) by assigning numbers 1 to 3 to the following: A) Limestone B) Chert C) Sandstone

**EES**

Name a mineral or rock that has more than one element and how humans use it in everyday life

**Maths**

The red ribbon is 27 cm long. the red ribbon is three times the length of blue. What is the length of blue?

**chemistry**

is it 2.5

**Algebraic expression**

translate 20 split evenly with a number into an algebraic expression

**History**

Identify another name given to the Muslim invaders.

**Statistics**

A vending machine pours an average of 8.0 oz of coffee with a standard deviation of 0.2 oz if it is functioning properly. An inspector wants to take 16 cups of coffee from the machine to see if the machine is functioning well or not. He wants to have a significance level of 4...

**life oreintation**

Show link between intrapersonal conflict and initiating relationship?

**Physics**

An object experiences a constant acceleration of 4.0 m/s2 along the −x axis for 4s, obtaining a velocity of 31 m/s in a direction 30° from the +x axis. Find the initial velocity vector of the object. (The angle of the object is measured counterclockwise from the +x-...

**morakolo sec**

To what extent can interpersonal conflict affect communication in a relationship?.

**Finance**

No,lose $84,658.62

**physics**

a projectile is thrown from the ground with an initial velocity of 20.0m/s at an angle of 40 degrees above the horizontal, find the maximum height,the time required to reach its maximum height,c) it velocity at the top of the trajectory.d) the range of the projectile,e) the ...

**Math**

34 meters

**Chemistry (Electrochemistry)**

Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M TI3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (a) Write the balanced reaction. Sn4+ + 2e- <...

**Chemistry (Acid-Base)**

Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL of benzene at (a) pH 4...

**Chemistry**

Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL of benzene at (a) pH 4...

**Chemistry**

In water at 25°C, which of the following is the most basic solution? a) pH = 3 b) pH = 0 c) [OH-] = 10-13 M d) [H3O+] = 10-13 M My assumption is is OH- 10^-13, but I am not confident, is this some sort of trick question?

**physics**

A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 87.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick forward (in the direction ...

**physics**

An object is moving so that its kinetic energy is 198 J and the magnitude of its momentum is 13 . 1 kg · m / s. Determine the speed of the object. Answer in units of m / s.