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# ral

hi, 35 female from the uk, thats it i hate talking bout myself! lol

• ### The function f........?

the function f is given by f(x)=ln(1 - cos x) (0<x<2pi)

applying in turn the composite and quotient rules, give an expression for each of the following

1. f'(x)

2.f''(x)

A. 1/cos x -1

B. 1+sin x/1- cos x

C. sin x/1- cos x

D. 1- sin x /1 + cos x

E. - (1/(1 - cos x)^2)

F. - (sin x/(1 - cos x)^2)

G. cos x - sin x - 1/(1 - cos x)^2))

H. sin x - cos x - 1/(1 +cos x)^2

choose the option that gives the area of the region which lies between the lines x= -1/3 pi and x = 1/2 pie above the x axis and below the graph of y=(3-cos x) cos x

A. 0.35

B. 1.07

C. 1.88

D. 2.63

E. 2.90

F. 3.41

G. 3.74

H. 4.07

choose the option that gives the area of the region which lies between the lines x= -1/3 pi and x = 1/2 pie above the x axis and below the graph of y=(3-cos x) cos x

A. 0.35

B. 1.07

C. 1.88

D. 2.63

E. 2.90

F. 3.41

G. 3.74

H. 4.07

To estimate the fuel consumption, in miles per gallon (mpg), of a new model of car, a manufacturer tested a random sample of 35of the cars. The amount of fuel used by each car was recorded. The average fuel consumption of the 35 cars was 32.4mpg, with standard deviation 2.26 mpg. Choose from the following that gives an approximate 95 per cent confidence interval for the fuel consumption of the new model.

A (27.1, 37.7)

B (28.0, 36.8)

C (28.7, 36.1)

D (30.4, 34.4)

E (31.5, 33.3)

F (31.7, 33.1)

• ### What is Angle A of a Triangle?

With respect to the usual convention for labelling a triangle, the triangle ABC has side lengths a= 3and b = 8, and angle B = 57degrees. Choose the option that gives the angle A of the triangle, to one decimal place.

A. 15.4

B. 18.3

C. 75.3

D. 104.7

E. 161.7

F. 164.6

G. It could be either 15.4 or 164.6

H. It could be either 18.3 or 161.7

• ### What is the domain of this function?

f(x)=(1)/squareroot((6+x)(2-x))

I think it is [-6,2] am I correct??

A sequence is deﬁned by:

un = 21 × (−0.83)^n − 9.7 (n = 1, 2, 3, . . .).

Choose the option that describes the long-term behaviour of the sequence.

Options

A) un becomes arbitrarily small (that is, un → 0 as →∞).

B) un becomes arbitrarily large and negative (that is, un →−∞ as n →∞).

C) un becomes arbitrarily large and positive (that is, un →∞ as n →∞).

D) un is unbounded and alternates in sign.

E) un approaches −9.7 (that is, un →−9.7 as n →∞).

F) un approaches 11.3 (that is, un → 11.3 as n →∞).

• ### A ball of mass 0.15kg rests in a corner between a vertical wall and a ramp that makes an angle of 65 degrees w?

A ball of mass 0.15kg rests in a corner between a vertical wall and a ramp that makes an angle of 65 degrees w?

a ball of mass 0.15kg rests in a corner between a vertical wall and a ramp that makes an angle of 65 degrees with the wall. Assume that the only forces acting on the ball are its weight W and normal reaction Nr from the ramp and normal reasction Nw from the wall. Magnitude of acceleration due to gravity to be g=10ms^-2

1) show the angle between the directions of the forces W and Nr is 155 degrees.

2) draw a force diagram for the forces acting on the ball, giving the sizes of the angles between the forces

3)draw a corresponding triangle of forces, giving the sizes of the angles

4)use the triangle of the forces to find the magnitudes of the two normal reactions, in newton to two decimal places.

• ### A ball of mass 0.15kg rests in a corner between a vertical wall and a ramp that makes an angle of 65 degrees w?

A ball of mass 0.15kg rests in a corner between a vertical wall and a ramp that makes an angle of 65 degrees w?

a ball of mass 0.15kg rests in a corner between a vertical wall and a ramp that makes an angle of 65 degrees with the wall. Assume that the only forces acting on the ball are its weight W and normal reaction Nr from the ramp and normal reasction Nw from the wall. Magnitude of acceleration due to gravity to be g=10ms^-2

1) show the angle between the directions of the forces W and Nr is 155 degrees.

2) draw a force diagram for the forces acting on the ball, giving the sizes of the angles between the forces

3)draw a corresponding triangle of forces, giving the sizes of the angles

4)use the triangle of the forces to find the magnitudes of the two normal reactions, in newton to two decimal places.

• ### Both ends of a rope length 5.6 m are attached to a horizontal beam, at points 4.8 m apart.?

A girl hangs on to the rope, 2.1 m from one of its ends.

A- calculate the angles that the two sections of rope make with the beam in degrees to two decimal places.

the girl has a mass of 36kg. Assume that the only forces acting on her are weight and the tensions in the two sections of the rope. Take the magnitude of the acceleration due to gravity to be g=10ms^-2.

B- Draw a force diagram for the forces acting on the girl giving the sizes of the angles between the the forces.

C- draw a corresponding triangle of forces indicating the sizes of the angles.

D- use the triangle of forces to find the magnitudes of the tensions in the two sections of the rope in newtons to 3 sig fig.

any help would be fab i know you cant draw the diagram but angles would be a big help

• ### Find the centre of the circle that passes through A=3,4 B=-3,2 C=9,-2?

Find the radius of this circle.

Write down the equation of this circle.

• ### Find the centre of the circle that passes through A=3,4 B=-3,2 C=9,-2?

Find the radius of this circle.

Write down the equation of this circle.

Please can someone explain how I would work this out.

Thank you

• ### Can any1 help me please? Consider the linear recurrence sequence...?

Can any1 help me please? Consider the linear recurrence sequence...?

Consider the linear recurrence sequence

x1 = 52, xn + 1 = -0.8xn -27 (n = 1, 2, 3, . . .)

(i) Find a closed form for the sequence.

(ii) Use the closed form to find the 8th term of the sequence, correct to four significant figures.

(iii) Describe the long-term behaviour of the sequence.

please can someone explain how i work this out

• ### Solve this equation for x?

Please could someone explain to me how to solve this equation.

(x+5 / x) - ( 8 /2x-3 ) = 0

• ### help with this equation plz?

Rearrange the following equation to find x in terms of y and t, in simplest form. (assume that 3t-y=0)

y(y-x)=3t(3t-x)

Please can someone explain how I go about solving this, as simply as possible please because I have no idea whatsoever.

• ### help needed please !!!!!?

Bearings of a cairn are taken from two points, A and B, 400 m apart along a stright north-south path.?

A being due north of B. The bearings of the cairn from A and B are 110 degrees and 80 degrees respectively. Choose the two options that give the distances from A and B to the cairn, correct to the nearest metre.

A= 402 m

B= 752m

C= 757m

D= 769m

E= 787m

F= 788m

G= 877m

H=878m

• ### TEA WITH THE QUEEN!!!!!!!?

anyone else laughing out loud when he sang the national anthem, and the salute....!!!!! o dear...funnest thing i have seen in this years big brother....lol