Science & Mathematics - 8 November 2007

I have tried several times to find the value of a but cannot figure it out, here is the equation y=a(x-h)2+k the two is suppose to be "squared" but I could not find the little two, the numbers for the equation are 11.7=a(32.2-80)squared + 14

2007-11-08 08:07:11 · 2 answers · asked by Anonymous in Mathematics

can someone please show me how to get the "real zeros"??

2007-11-08 08:03:10 · 3 answers · asked by Anonymous in Mathematics

2007-11-08 07:55:29 · 1 answers · asked by Anonymous in Chemistry

Angle AOB has a tangent of ________ and an angle measurement of ______ radians

2007-11-08 07:54:59 · 2 answers · asked by Anonymous in Mathematics

An 0.8-kg object is attached to one end of a spring and the system is set into simple harmonic motion. Please take the values of A and T as: A = 0.091 m and T = 1 s. If the amplitude, A, of the motion is .091m, and angular frequency omega is 6.283 rad/s and the spring constant is 31.582, then
a) Find the speed of the object at t=3s
b) Find the magnitude of the objects acceleration at t=3s

2007-11-08 07:50:21 · 1 answers · asked by Jerry M 1 in Physics

An 8.0-kg hanging block is connected by a string over a pulley to a 6.5-kg block sliding on a flat table (Fig.P5.47). If the coefficient of sliding friction is 0.28, find the tension in the string.

2007-11-08 07:46:47 · 1 answers · asked by Imad Syed S 1 in Physics

1/ rtsq b + rtsq c , 1/rtsq c +rtsq a, 1/ rtsq a + rtsq b
is an arithmetical progression.

2007-11-08 07:44:42 · 2 answers · asked by Crystal 3 in Mathematics

2007-11-08 07:44:04 · 3 answers · asked by Shivers20 2 in Mathematics

2007-11-08 07:41:41 · 4 answers · asked by Shorty 5150 2 in Astronomy & Space

Hi, I'm thrown off by the natural log in this problem.

Determine the convergence or divergence of the sequence with the given nth term. If the sequence converges, find its limit.

sequence = ln n^1/2 divided by n

How do I go about solving this problem? It's an even problem, so I don't have an answer to work toward.

Thanks! :>)

2007-11-08 07:39:27 · 2 answers · asked by LLH 2 in Mathematics

A rope is stretched between supports 15 m apart. Its tension is 35 N. If one end of the rope is tweaked, the resulting disturbance reaches the other end 0.48 s later. What is the total mass of the rope?

2007-11-08 07:37:43 · 1 answers · asked by katherine g 2 in Physics

Hi - I need help with the following even question from my textbook:

A company buys a machine for $225,000 that depreciates at a rate of 30% per year. Find a formula for the value of the machine after n years. What is its value after 5 yrs.?

Any help would be appreciated. Thank-you!

2007-11-08 07:36:58 · 1 answers · asked by LLH 2 in Mathematics

How should the arithmetic progression be, in order that sum of every 2 numbers (which are part of the progression) is part of the progression?
The same question about the geometric progression.

2007-11-08 07:34:08 · 1 answers · asked by Crystal 3 in Mathematics

If y = 4x + 14, what is the value of y ÷ -4?

2007-11-08 07:31:52 · 4 answers · asked by Testhaha 1 in Mathematics

(this is part of my physics homework when studying about falling bodies through fluids)

2007-11-08 07:27:18 · 5 answers · asked by Jessikhaxo 1 in Earth Sciences & Geology

So far I know this type of collision is somewhat inelastic. But, I'm not sure what equation I should use to approach this problem. Please help!

Collision between two pucks on an air-hockey table.
Puck A has a mass of 3.1 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 7.1 kg and is initially at rest. After the collision, the two pucks fly apart with the angles: Puck A= 65 degrees, Puck B= 37 degrees.

(a) Find the final speed of:
puck A=
puck B=

(b) Find the kinetic energy of the A+B system:
before the collision=
after the collision=

2007-11-08 07:21:18 · 1 answers · asked by =P 6 in Physics

2007-11-08 07:20:44 · 7 answers · asked by Anonymous in Astronomy & Space

) The surface area of a beach ball is 144 in2. Find the volume of air the beach ball will hold when fully inflated.



A)
16 in3

B)
144 in3

C)
288 in3

D)
36 in3





2) The actual length (L) of a rectangle is 27 centimeters. Use the scale drawing of the rectangle shown to find the actual width (W).



A)
18 cm

B)
40.5 cm

C)
9 cm

D)
15 cm





3) Find the sum of the measures of the interior angles in the figure.



A)
540 degrees

B)
900 degrees

C)
1260 degrees

D)
360 degrees





4) Which statement is true about Triangle ABD and Triangle CBD?



A)
There isn't enough information to determine if the triangles are congruent.

B)
The triangles cannot be proven congruent because nothing is known about the angles of the triangles.

C)
The triangles are congruent, proven by ASA.

D)
The triangles are congruent, proven by AAA.





5) A right triangle is removed from a rectangle as shown in the figure. Find the area of the remaining part of the rectangle. [Area of a triangle = 1/2(b)(h)]



A)
57 sq. inches

B)
57.5 sq. inches

C)
58.875 sq. inches

D)
60 sq. inches




6) Find the slope between the two points.

(6,10) and (4,-2)



A)


B)
6

C)


D)
-2





7)



A)


B)


C)


D)






8) Find the value of x.



A)
10

B)
70

C)
130

D)
50




9) If a triangle is acute, then all three angles have a measure of 60°.

Provide a counterexample to show that the statement is false.



A)
The three angles could be 30°, 30°, and 30°

B)
The three angles could be 30°, 60°, and 90°

C)
The three angles could be 30°, 70°, and 80°

D)
The three angles could be 30°, 30°, and 120°





10) Which pair of angles are congruent?



A)
1 and 8

B)
4 and 6

C)
5 and 6

D)
1 and 7





11) If two angles are supplementary, then they are adjacent.

Which diagram provides a counterexample for the statement above?



A)


B)


C)


D)






12) Jimmy ran 3 miles west from home and then turned north and jogged 4 miles. How far is Jimmy now from home?



A)
4 miles

B)
7 miles

C)
5 miles

D)
3.5 miles





13) Determine the longest side in DDEF.



A)
segment EF

B)
segment DE

C)
segment FE

D)
segment DF




14) What is the volume of a rectangular prism in which the height is 3mn2 and the area of the base is 7m2n?



A)
21m3n3

B)
10m3n

C)
21mn

D)
10m3n3





15) The diameter of your bicycle wheel is 25 inches. How far will you move in two turns of your wheel? Use 3.14 for .



A)
about 39 inches

B)
about 78 inches

C)
about 157 inches

D)
about 314 inches





16) The quadrilaterals shown are rectangles. Are they similar? If so, find the scale factor of the larger rectangle to the smaller rectangle.



A)
No

B)
Yes 2:3

C)
Yes 3:2

D)
Yes 4:3





17) In the diagram, line AB is parallel to line CD. Assume that b = 6x + 8 and g = 4x + 12. Find the value of x.



A)
2

B)
4

C)
10

D)
3





18) Choose the next figure in the geometric pattern.



A)
A

B)
B

C)
C

D)
D




19) Rectangle EFGH has the following coordinates:
E(-3,-1) F(-3,3) G(-1,3)

Find the coordinates of point H.



A)
(1,-1)

B)
(-1,1)

C)
(-1,-1)

D)
(-1,0)





20) If triangle MAS triangle TAR. Which of the following statements may not be true?



A)
segment MA segment TA

B)
segment MA segment SA

C)
MAS >TAR

D)
ASM ART





21) Are the lines perpendicular? If yes, determine the slopes of both lines.



A)
NO

B)
YES; 3,-3

C)
YES; 1,-1

D)
YES; 2, -1/2





22) What theorem or postulate proves that the triangles are congruent?



A)
SSS

B)
SAS

C)
ASA

D)
AAS





23) Find the volume of a cylinder with a radius of 3 cm and a height of 7 cm.



A)
21 cm3

B)
63 cm3

C)
126 cm3

D)
9 cm3

2007-11-08 07:19:45 · 8 answers · asked by Anonymous in Mathematics

a. 0.4074
b. 0.4394
c. 2.0369
d. 0.1769

Book is not helping me at all ....Please save me from my algebra disaster!

2007-11-08 07:18:43 · 9 answers · asked by Hollywood614 2 in Mathematics

12d+7=5d+14 what is the value of d?

2007-11-08 07:18:14 · 9 answers · asked by Anonymous in Mathematics

and how mach difference between them....please.I will choose the best answer..

2007-11-08 07:17:25 · 3 answers · asked by Calgarian_man 2 in Chemistry

do you play video games?

2007-11-08 07:17:19 · 8 answers · asked by Anonymous in Mathematics

A man launches his boat from point A on a bank of a straight river, 4 km wide, and wants to reach point B, 4 km downstream on the opposite bank, as quickly as possible. He could row his boat directly across the river to point C and then run to B, or he could row directly to B, or he could row to some point D between B and C and then run to B. If he can row 6 km/h and run 8 km/h, where should he land to reach B as soon as possible? (We assume that the speed of the water is negligible compared to the speed at which the man rows.)

2007-11-08 07:14:00 · 2 answers · asked by syem64 2 in Mathematics

If you could explain it to me I would be very happy!

2007-11-08 07:13:54 · 1 answers · asked by Anonymous in Biology

2007-11-08 07:09:26 · 2 answers · asked by simonkf2002 1 in Mathematics

2007-11-08 07:02:32 · 5 answers · asked by Cory w 1 in Weather

...this trait?
A. only his daughters
B. every other son
C. all of his children
D. only his sons
E. none of his children

2007-11-08 06:57:34 · 4 answers · asked by Anonymous in Biology

a. 1.1202
b. -1.9005
c. -0.2800
d. 2.1418

HELP ME PLEASE!

2007-11-08 06:56:47 · 5 answers · asked by Hollywood614 2 in Mathematics

helpppppp

2007-11-08 06:56:31 · 1 answers · asked by hOLLiSTER gURLiE! 1 in Mathematics

Can someone explain "light years" in terms that an Idiot like me can understand?

2007-11-08 06:53:48 · 19 answers · asked by mreed72 3 in Astronomy & Space