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jay
Questions and answers by visitors named
jay
, page 4
Questions (647)
Tom wants to run 2 1/2 miles on a 2/3mile track how many laps does tom run. I had add 2/3+2/3= 4/3 adding it up to get a 2 1/2
1 answer
382 views
Which choice best describes the underlined words in the sentence?
Look at the stars and planets on a clear night. (Points : 3)
4 answers
618 views
A compound contains 14.5 g of magnesium and 3.5 g of oxygen. What is the mass percent of oxygen in the compound?
4 answers
528 views
Which of the following statements is CORRECT regarding deciding whether an alcohol sale is legal?
A. IF a person looks over 21,
7 answers
15,743 views
what are the factors of p^2 + 11p - 42 ?
Thank You.
1 answer
348 views
limit of x approaches -3. (2x^2 + 4x + 1)
1 answer
302 views
1/tan60';sin90',tan60';...form a sequence. Calculate the fourth term.
4 answers
569 views
Three terms of geometric sequence: T1,T2 and T3.
If T2=T1+4 and T3=T2+9 determine the values of T1,T2 and T3.
3 answers
911 views
If 3•5/9 and 40•1/2 are the 1st and last term of geometric sequence. Determine the value of fifth term if there are seven
1 answer
407 views
A number of circles touch each ather. The area of the smallest circle is 4n cm^2 and each consecutive circle has area 9/4 times
2 answers
533 views
A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times
1 answer
525 views
A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times
3 answers
597 views
A number of circles touch each ather. The area of the smallest circle is 4picm2 and each consecutive circle has area 9/4 times
3 answers
742 views
write an equation of a circle with the given center and radius. center (–7 –3) and radius 13
2 answers
488 views
Brenda takes out a twenty year loan of R400,000..she repays the loan by means of equal montly payments starting one month after
2 answers
615 views
Which statement is true regarding nuclear energy
1 answer
367 views
Show how you would solve by Substitution:
2x + y = 0 x – 3y = -7 Show how you would solve by Elimination: 3x + 4y = 1 5x – 3y
1 answer
420 views
T varies inversely as R and T =3.5 when R =10
1 answer
384 views
A two-tailed test is conducted at the 0.10 significance level. What is the P-value required to reject the null hypothesis?
A.
1 answer
772 views
The plane P1 has equation r = (2,1,1)+lambda(-2,1,8)+mu(1,-3,-9)
The plane P2 has equation r = (2,0,1)+s(1,2,1)+t(1,1,1) Show
2 answers
576 views
The graph of a second-order polynomial is shown below, and the intercepts with the axes are marked. Explain how you can use the
2 answers
1,049 views
Suppose a manufacturer produces the football as shown below, they want to print one 2014 football World Cup logo and one
2 answers
491 views
We have two kind of tiles : 1 x 1 and 2 x 2, and use them to cover the 8 x 3 road without overlapping, how many different ways
1 answer
397 views
Paint the 4 faces of a regular tetrahedron by using 3 types of colors, how many possible solutions are there?
1 answer
322 views
Use 3 types of colored beads to seal onto the vertices of a regular pentagon, how many possible solutions are there? Hint: The
1 answer
363 views
There are 4 kinds of colored beads( r, g, b, y) to seal onto the 6 vertices of a regular hexagon, how many solutions are there?
1 answer
322 views
For the 6 faces and 8 vertices of a regular hexahedron, respectively sealed with red and blue these 2 beads (each face contains
1 answer
428 views
10 red, 10 blue, 10 green matches are used to build a regular icosahedron, how many possible solutions are there?
3 answers
417 views
a final examination score in General maths is weighted four times as much as each test score If the student has a final exam
4 answers
800 views
Two men and six boys can cut a field in 3 hours. If the men work at 3/2 times that of the boys, how many men are required to cut
6 answers
1,374 views
Two men and six boys can cut a field in 3hours. If the men work at 3/2 times that of the boys, how many men are required to cut
4 answers
1,358 views
The next step is to construct side PS of the figure so that side PS is parallel and congruent to side QR. The chart below shows
4 answers
2,408 views
all of us has or have?
4 answers
444 views
All of us have different stand on what to believe in and it varies because it depends on one’s life experiences.
is my sentence
3 answers
372 views
(6- 1/2 I)-(3+ 9/2 I)
1 answer
261 views
An academic department with five faculty members—Anderson, Box, Cox, Cramer, and Fisher—must select two of its members to
5 answers
4,105 views
Consider the system of components connected as in the accompanying picture. Components 1 and 2 are connected in parallel, so
3 answers
1,441 views
A reaction proceeds by the following three-step mechanism with elementary rate coefficients,
k. A + B → C k 1 C → A + B k -1
1 answer
430 views
since a rectangle forms two area of a circle shouldn't it also form two circumference in a cylinder
3 answers
331 views
A sofa cost $500 and is on sale for 20 % off. what is the final cost of the sofa after the discount?
1 answer
423 views
The hook of a spring balance carries an object of mass 5kg And the balance is suspended vertically from the roof of a lift. Find
2 answers
539 views
A ball is thrown from the ground level with a x-velocity of 25m/s and a y-velocity of 45m/s. What is the ball velocity at the
1 answer
428 views
Could someone please help.
Consider the function 3x^2-7. Find f(-2). a) -1 b) 5 c) -5 d) 0 I think its a) -1 but not sure. Thank
1 answer
292 views
Could someone please help.
Consider the function 3x^2-7. Find f(-2). a) -1 b) 5 c) -5 d) 0 I think its a) -1 but not sure. Thank
1 answer
261 views
What is the factor of safety for a steel hanger having an ultimate strength of 70,000 Newton per
cm2 and supporting a load of
2 answers
557 views
Determine the enthalpy of 5.0 kg of water at 850 kPa.
thankyou very much!
3 answers
882 views
A triangle is such that the largest angle is 12 times the smallest angle. The third angle is 20 less than the largest angle.
2 answers
584 views
How many quarts of permanent anti-freeze must be added to 10% quarts of a 40% anti-freeze solution in a radiator of a truck to
2 answers
513 views
Evaluate the given integral, where C is the circle with positive orientation.
Cauchy integral theorem, integral over C
2 answers
598 views
If 200 cm3 of tea at 95°C is poured into a 150-g glass cup initially at 25°C, what will be the common final temperature T of
5 answers
2,675 views
the mass of helium 4 atom is 6.64648 x 10^24 g and each of its two electrons has the mass 9.10939 x 10^-25 what fraction of the
1 answer
502 views
A fire hydrant that is 1.5 feet high casts a shadow that is 2.5 feet long. At the same time of day, a lamppost casts a shadow 15
4 answers
1,629 views
Find the first order partial derivatives. z=ln(xy-sqrt(x^2-y^2)
3 answers
1,241 views
Ice cubes of total mass 6.00 grams have temperature -4.0°C. Then they are placed in 50.0 grams of water at 20.0°C in an
1 answer
642 views
a 2.0 kg solid mass has an apparent weight 12.34N when totally immersed in water. Calculate the apparent weight of the body when
5 answers
2,234 views
fine sand moves through pipes just like fluid. a sandblasting machine moves fine sand through a pipe of inner diameter 2.8 cm at
2 answers
498 views
C2H6 <> C2H4 + H2. when 1.00mol ethane is cracked at 180kPa and 1000K, the yield of ethene is 0.36mol. Calculate the value Kp at
2 answers
546 views
need a probability distribution to select a parking stall in a parking lot with 50 stalls
1 answer
343 views
A body whose weight is W1=75N is tied to another body whose weight is W2=45N .If the coefficient of kinetic friction between W1
3 answers
648 views
A body whose weight is W1=75N is tied to another
body whose weight is W2=45N .If the coefficient of kinetic friction between W1
2 answers
536 views
determine the energy stored in a 2m long wire of cross sectional area 0.5mm^2 kf the force of 50N is applied to it.
2 answers
523 views
an ideal gas occupies a volume of 22.4litres at stp while absorbing 2.53KJ of heat from the surrounding the gas expands
3 answers
1,559 views
perform this operation to the correct significant figure. 2.0cm × 0.01m in the correct significant figure.
should the answer be
1 answer
476 views
A license plate in a particular state consists of 5 characters. The first 4 characters are made up using the digits 0-9, but the
2 answers
583 views
The demand for your hand-made skateboards, in weekly sales, is
q = −4p + 600 if the selling price is $p. You are prepared to
2 answers
770 views
Two trucks A and B each travelling at 40 km/hr, move towards each other . At the instance when the two trucks are at a distance
6 answers
1,609 views
what is the work done a bringing a charge from infinity to a point P, if the point P is 5m to the positive y-axis from a charge
3 answers
872 views
Find the variation constant and an equation of variation if y varies directly as x and the following conditions apply.
2 answers
495 views
It takes a hose 4 minutes to fill a rectangular aquarium 8 inches long, 9 inches wide, and 10 inches tall. How long will it take
2 answers
813 views
a handbag weighing 162N is carried by the students each holding the handle of the bag next to him. If each handle is inclined at
3 answers
1,088 views
A force of 80N acts on a body initially at rest and moves 72m in 6s. If the force is removed after 6s calculate how far the body
5 answers
1,464 views
If = 38° and y = 42 cm, what is the value of z to the nearest tenth of a centimeter?
4 answers
806 views
the nuclei Co-57 an odd-even unstable nucleus is often used as a source of radiation in nuclear processes. Show that the nuclei
1 answer
479 views
A proton is projected at a stationary 6238 Ni aluminum target. The proton momentarily comes to a
halt at a distance from the
2 answers
518 views
Neptunium 239
93 Np has a decay constant of 3.40 ×10-6 s-1. A 3.0-mg sample of Np-239 is prepared. The activity of the Np-239
2 answers
802 views
Neptunium 239
93 Np has a decay constant of 3.40 ×10-6 s-1. A 3.0-mg sample of Np-239 is prepared. The activity of the Np-239
4 answers
497 views
A radioactive source of a single nuclide emits 2.4-MeV neutrons at the rate of 9200 neutrons per second. The number of atoms in
1 answer
521 views
A radioactive source of a single nuclide emits 2.4-MeV neutrons at the rate of 9200 neutrons per second. The number of atoms in
1 answer
757 views
A certain elementary gas is triatomic and has vapour density 48 . The atomic mass of the gas is (a) 48 (b) 96 (c) 32 (d) 16 ..
2 answers
1,270 views
A mixture of 0.2 moles of alcohol A and 0.5 moles of alcohol B has a total vapour pressure of 40 mmHg at 297 K. If the mixture
2 answers
555 views
magnessium chloride can be used to distinquish between cabonate and hydrogencarbonate ions. Descrbe how this done with
1 answer
328 views
magnessium chloride can be used to distinguish between cabonate and hydrogencarbonate ions. Describe how this is done with
1 answer
355 views
what is volume, if base area 56 in2, height 6 in
10 answers
3,427 views
calculate the lowest frequency of UV. light which has enough energy to break a Cl-Cl bond. ( bond energy =243kj/mol). I got
2 answers
672 views
A sample of hexane was cracked. A sample of 50cm³ of gas was produced. The gas decolorized 4cm³ of 0.23moldm–³ solution of
1 answer
409 views
A sample of hexane was cracked. A sample of 50cm³ of gas was produced. The gas decolorized 4cm³ of 0.23moldm–³ solution of
3 answers
369 views
before 1900 the activity per mass of atmospheric carbon due to the presence of carbon-14 averaged about 0.255bq/g of carbon 1.
2 answers
516 views
before 1900 the activity per mass of atmospheric carbon due to the presence of carbon-14 averaged about 0.255bq/g of carbon 1.
2 answers
547 views
why does BeCl2 have low melting point but SiO4 has high melting point even though they are both covalent bonds between the atoms
4 answers
677 views
why is born haber cycle not generally used to consider the energy changes involved in the formation of solid silicon(IV)oxide
4 answers
832 views
born haber cycle is not generally used to consider the energy changes involved in the formation of solid silicon(IV)oxide SiO2
2 answers
563 views
Please can someone show me how to go about this problem? The X-Y plane is illuminated by an electric field of strenght given as
1 answer
423 views
Please can someone show me how to go about this problem? The X-Y plane is illuminated by an electric field of strenght given as
3 answers
357 views
the length of a rectangular garden is 4m more than its width determine the gardens width if the area is 117m^2
4 answers
1,337 views
Two charges of magnitude +2×10^–6 C each are 60cm apart. find the magnitude of the force exerted by these charges on a third
1 answer
741 views
Change the italicized clause to a nominative absolute. Rewrite the entire sentence in the box below.
As the hurricane season was
3 answers
1,637 views
The two 4's in the number 420.41 have different values. What is the difference in their values?
1 answer
328 views
14cos+7=O
1 answer
326 views
Please help!!!!!
You earn $240 for your first paycheck. You pay 22% of it in taxes. You decide to put 40% of the remaining money
2 answers
615 views
The discounted price of a book is 85% of the original price. This is a savings of $3. A sales tax of 8% will be added to the
1 answer
448 views
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