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ruth
Questions and answers by
ruth
Questions (94)
Suppose X1;X2;...;X5 is a random sample from a n(0; variance) distribution. define
U = X1+X2+X3+X4; V =
1 answer
1,141 views
A normal population has an expected value of 60 and a variance of 30. Use the central limit theorem to determine what the sample
1 answer
623 views
Let X1;X2;X3;...;X6 be a random sample from a distribution with the following probability desity function:
Fx(x) = (1+4x)/3 for
1 answer
646 views
ogranelle that modifies,packages and transport material out of the cell
describes an organism that can exist onlly as a group of
1 answer
486 views
ogranelle that modifies,packages and transport material out of the cell
describes an organism that can exist onlly as a group of
1 answer
453 views
where is the setting of charollet web
1 answer
277 views
1285 hrs to manufacture first unit - expects to achieve a 92% unit learning curve - how many hours would be required to
1 answer
402 views
c be the curve of the equation y=3x^5+10x^4-10x^3+60x^2+25x-5. among all points on the curve over the interval [-1,3], find the
1 answer
418 views
why was italy the forst to use indo arabic numerals?
1 answer
415 views
.A ______________ _ is a signal to which an organism responds
3 answers
784 views
Selena received a $42 commission for selling a computer for $1400. What percent is her commission?
1 answer
456 views
A company's cost of doing business in a recent month was $18,000. Their revenue on sales for that month was $27,000. What
1 answer
434 views
translate into an algebraic expression
34 multiplied by d I don't understand this
3 answers
531 views
Determine the probability of rolling a sum of 9 or an odd number with two
number cubes.
1 answer
455 views
Application Practice
Answer the following questions. If appropriate, use Equation Editor to show your work. First, save this file
1 answer
857 views
t squared plus 10t plus 16
1 answer
332 views
what is 2 meters long or 2 meters high that you can find in a home
1 answer
406 views
how do computer viruses work?
3 answers
334 views
list the integers between -5 and 2, inclusive.
6 answers
1,215 views
{y < -4/3}
interval notation this is what I got... (-∞, -4/3)
1 answer
258 views
8-4( 2-3)^2 ÷ √4
1 answer
211 views
(-1/6 + √4/9 )^2
2 answers
528 views
write the opposite, reciprocal, and absolute value of each number . A: -1/2 #: 4 C: 0
3 answers
705 views
write the opposite, reciprocal, and absolute value of each number . A: -1/2 #: 4 C: 0
3 answers
415 views
-8/3•2
3 answers
241 views
simplify : 1/2( 2x-1)-(3x-3/2)
4 answers
295 views
x=9/10
4x+y=3 4(9/10) +y= 3
4 answers
268 views
-84/43 -7y=7
2 answers
530 views
A man of mass 67.1 kg stands on a scaffold supported by a vertical rope at each end. The scaffold has a mass of 24.6 kg and is
2 answers
601 views
1. "bedside terror" is a play on the common phrase "beside manner", which is used to describe how well doctors relate to their
4 answers
589 views
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 175 and a variance of 4.
2 answers
805 views
When scoring the MMPI 2, how can you intrepret it and what is the diagnosis according to Axis II. The scores are as follow:
?= 13
1 answer
379 views
if apr is 7.3% daily and haad $400 1st 10 days, 1500 next 10 and 600 next 10 how much intrest was earned at end of month
1 answer
417 views
My algebra question is;
The ordered pair (3,0) is found? I don't have a clue. Can you help please? Thank you, Ruth
3 answers
962 views
what factors account for the similarities and differences between the subdivisions in tropical climate zones?
2 answers
1,127 views
lyf style of hiv and aids
3 answers
290 views
which has more number of particles, 3g of acetone or 3g of acetic acid
2 answers
812 views
If a random sample of size n = 65 is drawn, find ¦Ìx, ¦Ò x and P(24 ¡Ü x ¡Ü 26). (Round ¦Ò x to two decimal places and
1 answer
1,238 views
what is the money value of 0.098
2 answers
491 views
if h(x)=sinπ/x then find hderivative(4)
1 answer
355 views
what is the 3rd derivative of f(x)=x^2 e^x^2
4 answers
360 views
what is the potential energy of 4 point charges each of value Q at the corners of a square of side length a.
7 answers
1,188 views
lnx monotonicity
3 answers
479 views
Solutioin A is sodiun hydroxide prepared by dissolving 2.0g in 250cm what is molar concentration of sodium hydroxide
1 answer
473 views
a parallel plate capacitor has an area of 5cm^2 and a capacitance of 3.5PF. the capacitor is connected to a 12v battery .after
3 answers
810 views
a manufacturer wants to design an open box that has a square base and a surface area of 48sq units what dimension will produce a
5 answers
2,213 views
find the drift velocity of the electrons in the copper wire (there are 8.5*10^28 free electrons per m^3 in copper)
2 answers
608 views
the radius r of a sphere is increasing at a rate of 3cm/min. find the rate of change of the area when r=3cm
5 answers
975 views
find dy/dx assuming that y is differentiable with respect to x and x is also differentiable with respect to y.
a)xy+x^2y^2=x^3y^3
6 answers
685 views
the radius r of a right circular cone is increasing at a rate of 2cm/min.the height h of the cone is related to the radius by
4 answers
1,351 views
a spherical ballon is inflated with gas at the rate 20cm^3 min. how fast is the radius of the ballon changing at the instant
4 answers
1,220 views
calculate the value of the resistor that will give a total resistance of 4 ohms if it is connected in parallel with a 12 ohm
1 answer
440 views
calculate the maximum working current of an appliance rated at 2.4kw with an operating voltage of 240v
1 answer
327 views
calculate the maximum working current of an appliance rated at 2.4kw with an operating
voltage of 240v
1 answer
352 views
1)a galvanometer has a resistance of 40 ohm and is of 3 mA full-scale deflection.how would you modify it to act as a 0-5 A
3 answers
1,043 views
how many electrons drift past a point on for 10 minutes current is 0.2 A.the charge on one electrons 1.6*10^-1
1 answer
377 views
the reaction A+3B->2C+D is first order with respect to reactant A and second order with respect to reactant B if the
2 answers
580 views
the reaction A+3B->2C+D is first order with respect to reactant A and second order with respect to reactant B if the
2 answers
644 views
the reaction A+3B—>2C+D is first order with respect to reactant A and second order with respect to reactant B if the
4 answers
2,280 views
classical conditioning , develop analogy for industry
3 answers
397 views
conflict has always been a part of our lives, especially in the decision making processes. write down a case of multiple
3 answers
660 views
how the organization of your choice goes about changing attitudes of their employees?
1 answer
291 views
a galvanometer has a resistance 60 ohm and is of 5mA full scale deflection.how would you modify it so as to get 0-10V voltmeter
2 answers
1,323 views
a student connects the ends of a pencil lead to a 6.0V supply and measures the current to be 8.6A.the lead is rod of graphite of
2 answers
494 views
an electron moves in the plane of paper toward the top of the page .a magnetic field is also in the plane of the page and
4 answers
2,893 views
a)find the charge to mass ratio for an electron accelerated through 600v in a magnetic field of strength 45mT where the speed of
1 answer
380 views
acetic acid has a pka of 4.8 how many ml of 0.1M acetic acid and 0.1M sodium acetate are required to prepare 1L of 0.1M buffer
1 answer
784 views
what kind of reactions require oxidizing agent(reduced or oxidized) for example SO3->SO4 does it require oxidizing or reducing
4 answers
860 views
a conducting loop consisting of a half circle of radius r=0.2m and three straight sections the half circle lies in a uniform
2 answers
784 views
prove that I=square root of (I^2avarage). using I=Iosin(wt)
1 answer
336 views
consider a series R-C circuit consisting of a 30 ohm resistor and 20*10^-6F capacitor connected to a 100V,50Hz power supply.find
2 answers
534 views
The North African Maghreb states, dominated by the Atlas Mountains, do not include
A. Libya. B. Algeria. C. Morocco. D. Tunisia.
3 answers
472 views
Three bags of wheat,two bags of corn, and one bag of oats weigh the same as one bag of wheat,one bag of corn and five bags of
4 answers
3,990 views
Helium gas occupies a volume of 0.04 m
3 at a pressure of 2 x 10 5 Pa (Nm -2 ) and temperature of 300 K. Calculate (i) the mass
6 answers
3,773 views
What separatation method used to separate silver chloride (solid))and sodium trioxonitrate
6 answers
4,167 views
Assume x and y have 5:3 profit sharing ratio respectivly and a new member enters by taking 1/5 from x and 1/3 from y.what will
4 answers
497 views
a candy mixture is made from two kinds of candy one kind costs twice as much per kg as the other kind.$10 worth of the less
1 answer
442 views
Express 4.050505... as a fraction
4 answers
1,401 views
express 7.179179... as a fraction
5 answers
513 views
a contractor needs two men and 5 litres of paint to paint on a fenced wall that is 40m by 3m in 9 hours. how many men and how
4 answers
1,017 views
Importance of reflection of sound waves
1 answer
296 views
the sum of two different numbers is 40 . if the smaller number is divided by 4 and the larger number by 12 the sum of the
2 answers
764 views
If (a+b)^2 = a^2 + 6b +b^2 ,what is the value of a?
4 answers
269 views
the H.C.Of two numbers is 7and their L.C.M is 140.If one of the numbers is 28,find the other number
3 answers
481 views
Two fractions have the same denominator,15. The difference between the fractions is 2/5,and the result of dividing one of them
3 answers
802 views
describe the force board experiment to show how to obtain the resultant of two non-parallel coplanar forces acting at a point.
2 answers
560 views
calculate the total vapour pressure of mixture of methanol(64g) and ethanol(92g) at 298K given that the pure vapour pressure of
5 answers
1,159 views
what are the limitations of depression of freezing point
2 answers
987 views
in a class of 50 student,18 offered mathematics, 21 offered chemistry while 16 offered biology, 7 student offered mathematics
3 answers
716 views
perform the indicated operation and express your result In a standard form
i) (4+3i) + (6+4i) ii) 3 + 4i/6+3i
2 answers
604 views
find the modulus argument and principal argument of each of the following
a) i b) -√5
2 answers
620 views
a plane leaves an airport P 10 degrees south,60 degrees east and flies due north at 800km/hr.find its position after 24hrs
1 answer
430 views
a plane leaves an airport P 10 degrees south,60 degrees east and flies due north at 800km/hr .(a)find its position after 24hrs.
1 answer
467 views
A system contains 0.15 𝑚3 of a gas at a pressure of 3.8 bar and 150℃ . It is expanded adiabatically till the pressure falls
5 answers
1,497 views
