Posts by sk

Total # Posts: 45

Algebra
An electrician charges a customer $260 for 4 hours. He charges one customer $150 for 2 hours. How much does he charge for his service fee, x, and his hourly charge, y, to his customers? Thank you!

Organic Chemistry
I honestly can't figure out how to draw this structure and it's especially difficult for online homework. I've used up 2 tries and only have one more left! Can someone please help? Thank you so much! CH3C?C(CH2)3C(CH3)3

physic
Time of flight formula =2×100/9.8 =20.40s Range formula =100×100÷9.8 =1020.4 =10.2m

math
how many stemps that 1.5*1.5 will fit on pieces of paper that 9*12 inch?

Maths
Two trains are running, on separate tracks, round a model railway layout. One completes a circuit every 40 seconds and the other every 55seconds. The trains start together at the station. How long, in minutes and seconds, will it be before they are at the tation together again?

physic
A 2000 N sled is pulled along a horizontal surface with a constant force by means of a rope that makes an angle of 30.0o with the horizontal. If the tension in the rope is 500 N and there is 100 N of frictional force between the sled and the surface, find the work done on the ...

Biology
MEIOSIS 1)name the process unique to meiosis that occurs during bivalent formation that may increase genetic diversity? 2)how are sister chromatic made and what is the structure that holds them together? 3)what do we call package of genetic information (DNA), encoding a ...

US history
although the two candidates differed in their political ideologies the election of 1840 remained relatively civil and polite. True or false

science
an automobile of mass 1800kg takes a turn of radius 270m. If the force on the tyres to maintain the motion along the curve is not to exceed 630n, the limiting speed of the vehicle assuming no banking will be

mathis
How many tiles that are 12 inches by 18 inches will be needed to tile a floor that is 15 feet wide and 20 feet long?

math
if angle A contains 1/2x and angle B contains 1/2(180-x) are the angles A and B supplementary, complementary, or neither

statistics
Is there an answer to this

maths
This answer is wrong

math
5

chemistry
What is the final pressure gas sample that is subjected to a temperature change from 22.0 C to 30.0 C and a volume change from 85.4 L to 37.0 L with an initial pressure 105 kPa?

7th grade science
haha

science
It has come to my attention that you have violated the Honor Code of the class. Your credentials on the site have been removed. Thank you for your time.

algebra
1

math
Find the volume generated by rotating the area between y = cos( 3 x ) and the x axis from x = 0 to x = π/ 12 around the x axis

physics
A man steps on his bathroom scale and obtains a reading of 243 lb. The spring in the scale is compressed by a displacement of -0.0480 inches. Calculate the value of its spring constant in (a) pounds per inch (b) newtons per meter.

physics
A student applies an upward force of 56 N to a 5.6-kg physics textbook. Find the book’s acceleration (positive for up, negative for down). answer in miles/seconds squared.

MATHS,7TH CLASS
Here, area=30 Ad=4.6

physics
pls show answers and work with the questions i have posted.

physics
A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when it hits the ground?

physics
Sam tosses a ball horizontally off a footbridge at 3.1 m/s. How much time passes after he releases it until its speed doubles?

trig
Use the double angle formula to verify the identity cotxsin2x=1+cos2x

Trig
Find the value of tangent of angle A, given cos2A = 4/5, and A terminates in quadrant 2

Trig
find sin(s+t), given that sin t=1/3, t in quadrant 2, and cos s = -2/5, s in quadrant 3

Trig
the angle of depression from the top of a building to a point on the ground is 32degrees30', how far is the point of the ground from the top of building if the building is 252m high?

Trig
The angle of depression from the top of the building to a point on the ground is 29degrees30', the point of the ground is 36 meters from the top of the building. Find the height of the building

Trig
A plane flies 1.3 hr at 100mph on a bearing of N40degreesE. It then turns and flies 1.5hr at the same speed on a bearing of S50degreesE. How far is the plane from its starting point?

Trig
A ship leaves its homeport and sails on a bearing of N28degrees10'E. Another ship leaves the same port at the same time and sails on a bearing of S61degrees50'E. If the first ship sails at 24.0 mph and second sails at 28mph, find the distance between the two ships ...

Trig
assume a pulley has a radius of 12.96 cm. If it takes 18 seconds for 56 cm of belt to go around the pulley, find the angular velocity in radians per seconds

Precalc
In 1992, the average cost of a ticket on a privately-owned airline was $145. This amount has increased by approximately $51 yearly. How much should you expect to pay for a ticket on this airline in the year 2005?

math
I got 738

5th grade Math
Thank you. I never thought about looking at them like money.

5th grade Math
Having problems with less than/greater than decimals. Wanted to double check some answers. a)0.5_1.0 My Answer is < b)3.2_3.02 My answer > c)4.83_4.8 My answer < d)6.25_6.4 My answer < e)0.7_0.07 My Answer >

physics 12- dynamics
A 5kg block slides down an incline of 25

physic12-dymanics
A 5kg block slides down an incline of 25 degrees to the horizontal at a constant speed. a) what is the net force on the block? b) what is the magnitude of the friction force acting on the block? c) If friction was negligible and the block was accelerating down , what would be ...

physic12-dymanics
A block is launched up the incline(coefficient of friction is 0.3) with an initial speed of 12m/s. What is the maxximum displacement of the block up the incline?

Ethics
What is “institutional discrimination?” Give an example

Chemistry
How would you purify decanoic acid contaminated with biphenyl? what method and solvent.Please help me

chemistry
Large atom goes on equatorial becasue equatorial is more stable than axial. You always want to have stable shape.

Ethics
what is the good of morality This site will give you some good ideas about that topic. http://en.wikipedia.org/wiki/Morality Morality is a guide; it helps us to decide what is "good" and what is "evil." In other words, it helps us to choose between those ...

Ethics in business
What do you think is the best way of doing business ethics and why 1) all transactions are above board: nothing under the table. 2) Honesty in all transactions. No misleading advertising, or terms. 3) Follow the law, if it conflicts with the two above, then state it publicly ...