Posts by Nada

Total # Posts: 45

physics
A house painter stands 3.0 m above the ground on a 5.0-m-long ladder that leans against the wall at a point 4.7 m above the ground. The painter weighs 680 N and the ladder weighs 120 N. Assuming no friction between the house and the upper end of the ladder, find the force of ...

Math (1 question)
whoops forgot C 2,291

Math (1 question)
estimate the area of a circle with a radius of 27 meters. Use 22/7 for pi. A. 258 square meters B. 1,125 square meters C. 2,291 square meters D. 5,253 square meters

statistics
In a hospital 6 deliveries have been occurred. The probability that the baby is female equal 0.48 a. Find the probability distribution of the variable representing the number of female babies.

Social Studies
Whales and seals is the answer

physics
the velocity of a particle moving along the axis is given for t>0 by v=(32t -2t^3 ) m/s where t is in s what is the acceleration of a particle when (after t=0 ) it achieves its maximum displacement in the positive x direction

Math
86

math
Jdjrjue

math/help please
15 minutes

physic
Depending on how you fall, you can break a bone easily. The severity of the break depends on how much energy the bone absorbs in the accident, and to evaluate this let us treat the bone as an ideal spring. The maximum applied force of compression that one man’s thighbone ...

physic
In Concept Simulation 10.2 you can explore the concepts that are important in this problem. Astronauts on a distant planet set up a simple pendulum of length 1.2 m. The pendulum executes simple harmonic motion and makes 100 complete oscillations in 330 s. What is the magnitude...

physic
The fan blades on a jet engine make one thousand revolutions in a time of 87.6 ms. What is the angular frequency of the blades?

physic
A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other end is connected to a box. The box is pulled to the right, stretching the spring. Static friction exists between the box and the table, so when the spring is stretched only by ...

phsic
When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, it oscillates at a frequency of 14.2 Hz. When another object of mass m2 is hung on the spring along with the first object, the frequency of the motion is 3.90 Hz. Find the ...

math
How to construct an angle of 135 degree?

U.S. GOVERNMENT
republic

Science
ok.assume the water is contain in a tube of u-shaped. When there is a suituation u mentioned above happen in t=0s then,when t>0s the water level will be the same REASON: by conservation of energy (*set the lowest pt of the tube is the reference level) things in a higher ...

Maths(permutation)
but the correct ans is 2520,why?

Maths(permutation)
A teacher prepares 5 different books for 7 students.If each student can get one or no book from the teacher , find the number of ways of distributing the books among the students. can u explain it to me detailly.i have thought about this question for serveral hours but i still...

Functions-Math
in fact , u can substitude -5 into the x variable,and the write it like this: 2(-5)^3+9(-5)^2+k(-5)-15=0 then plz find k

business law
Goods versus Services. Fred and Zuma Palermo contacted Colorado Carpet Installation, Inc., for a price quotation on providing and installing new carpeting and tiling in their home. In response, Colorado Carpet submitted a written proposal to provide and install the carpet at a...

math
what is 80+80

education
What would an example be. Because on my handout it says provide an example of how this aspect impacts the teachers choices and decisions.

education
One of the aspects of instructional scaffolding is ownership which values the students own interpretations and requires them to argue for what they are saying. How does this aspect impact the teachers choices and decisions?

chemistry
why is the hydrous copper sulfate heated to constant weight?

Physics
pls

Trig
Ok I was wondering why the zero with the slash was in the equation, i have never seen that before!

Trig
a) Determine the equation of a sine function that would have a range of {y€R|-7<(or equal) Y <(or equal) 1} and a period of 135degrees. b) determine the cosine function that results in the same function an part (a). Any help provided will be greatly appreciated.

Trig
Srry I keep asking questions, but I noticed that you left out the negative sign on the 2 when you set the equation to zero, was that a mistake or were you suppose to do it like that?

Trig
Ok so how did you get x to equal 20, 140,100........ And I also don't get where 3x=60 or 100 came from, can you please explain these parts by showing the math? Thank you

Trig
Determine the roots of the function f(x)=-2cos(3x)-1. Can you please show all the work so it is easier to understand, thank you!!

Graphing
What are the steps to graphing this quadratic equation? Y=(-2x)^2

Inverse functions
Solve for y to determine the inverse y=2-(1/2x)

Sine, cosine law
Srry but how did u get 145?

Sine, cosine law
A sail boat on lake Huron leaves Southampton and sails 20degrees west of north of 20km. At the same time, a fishing boat leaves Southampton and sails 30degrees west of south for 15 km. At this point, hot far apart are the boats, to the nearest km? ( the answer is 4139 km, but ...

Trig-sine, cosine law
Thank you so much:)

Trig-sine, cosine law
Um the answer I was given was 5.7km or 30.5km So how wud u get these answers?

Trig-sine, cosine law
Two fire stations,P and Q,are 20 km apart. A ranger at station Q sees a fire 15.0 km away. If the angle between the line PQ and the line from P to the fire is 25degrees, how far to the nearest tenth of a kilometre, is station P from the fire?

Sine, cosine law
I'm not sure if it is parllel, it dosent have a diagram so it got me confused! But I know it is not in 3D, the answer in the txtbook is 299.7m, I just need the method to get it

Sine, cosine law
The Pont du Gard near Nimes, France is a roman aqueduct. An observer in a hot air balloon some distance away from the aqueduct determines that the angle of depression to each end is 54 degrees and 71 degrees respectively the horizontal distance between the balloon and aqueduct...

Math
The Pont du Gard near Nimes, France is a roman aqueduct. An observer in a hot air balloon some distance away from the aqueduct determines that the angle of depression to each end is 54 degrees and 71 degrees respectively the horizontal distance between the balloon and aqueduct...

trig
(Tan²θ * sin²θ) + cos²θ +2sin²θ = sec²θ

biology
how can the absence of starch in the elaborated sap be explained knowing that it is produced by photosynthesis?

dynamics of catering
1 You’re likely to encounter formal service in all of the following settings except which one? A. A gourmet restaurant C. A church outing B. A wedding D. A dinner party 2. Which of the following statements about table service settings is correct? A. Silverware is ...

literature
is the character of stevens in ishi guru's novel the remains of the day skeptic, ambivalent and uncertain about going on a journey?