Friday
December 9, 2016

Posts by Ana

Total # Posts: 1,284

Math
The probability that a person stopping at petrol pump will get his tyres checked is 0.12, the probability that he will get his oil checked is 0.29 and the probability that he will get both checked is 0.07. A) what is the probability that a person stopping at this pump will ...
December 9, 2016

Math
2(l+w)=44. l=2w+7 2(2w+7+w)=44 6w+14=44 w=5 l=2(5)+7 l=17
December 7, 2016

Physics
Thank you so much!
December 7, 2016

Physics
A child of mass 30 kg stands beside a circular platform of mass 95 kg and radius 2.4 m spinning at 2.3 rad/s. Treat the platform as a disk. The child steps on the rim. a) What is the new angular speed? b) She then walks to the center and stay there. What is the angular ...
December 7, 2016

Physics
Thanks Damon you're the real MVP! It was rad/s sorry.
December 7, 2016

Physics
A circular disk of mass 0.4 kg and radius 36 cm, initially not rotating, slips down a thin spindle onto a turntable (disk) of mass 1.7 kg and the same radius, rotating freely at 3.4 a) Find the new angular velocity of the combination; b) The change in the kinetic energy? c) If...
December 7, 2016

math
Thank you God bless you :)
December 7, 2016

math
an arithmetic series is such that the ninth term is zero and the sum of first 25 terms is 50.the first term of the series?
December 7, 2016

math
the 54th term and 4th term of an A.P are -61 and 64 respectively.Find the common difference and 23rd tem
November 30, 2016

Physics
A block of mass 2.5 kg hangs vertically from a frictionless pulley of mass 6.5 kg and radius 16 cm. Treat the pulley as a disk. Find: a) the acceleration of the block b) the tension in the rope I don't even know where to begin,
November 27, 2016

Physics
A torque of 50 N*m acts on a wheel of moment of inertia 25 kg*m^2 for 4 s and then is removed. b)How many revolutions does it make in 15 s if it starts at rest? I found the angular acceleration, 2 rad/s^2, but I don't know how to find the amount of revolutions.
November 27, 2016

Math
thanks for hepling God bless you
November 21, 2016

Math
If thrice of "A's" age 6 years ago be subtracted from twice his present age the result would be equal to his present age. Find "A's" present age.
November 21, 2016

Math
thank you for helping God bless you
November 21, 2016

Math
Ten years ago the age of the father was four times of his son. Ten years hence the age of the father will be twice that of his son. The present ages of father & son are?
November 21, 2016

Math
thank you for helping God bless you :)
November 21, 2016

Math
A number is as much greater than 21 and is less than 71. The number is?
November 21, 2016

College Math
Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing three red marbles, three green ones, four white ones, and three purple ones. She grabs seven of them. Find the probability of the following event, expressing it as a fraction in lowest ...
November 20, 2016

Calculus
The ladder would end up making a right triangle with the ground and the wall, so that makes it possible to use the sine law because you know the angle across from the ladder. 18/sin 90 = x/sin 70 x = 18*sin 90 = 16.91m
November 19, 2016

Calculus
It's cool. I figured it out on my own. But for anyone in the future who needs help with a similar question: F'(a)=f'(a^4)*4a^3 =12*4*15 =720 G'(a)=4(f(a))^3*f'(a) =4(2)^3*4 =128 You just have to replace x with a and use the chain rule. I didn't realize ...
November 19, 2016

Calculus
Let F(x)=f(x^4) and G(x)=(f(x))^4. You also know that a^3=15, f(a)=2, f?(a)=4, f?(a^4)=12. Find F?(a) and G?(a). I don't even know where to begin.
November 19, 2016

math
a company sells one of its product at Rs.12 per unit a year.its cost function is given by [c(x)=0.01x^2+8^x+7],where x represents the number of units.the number of units and the maximum profit for which profit function maximizes are:
November 17, 2016

yeah solved
Thanks :)
November 16, 2016

math
A man travels 600km partly by train and partly by car.If he covers 120km by train and rest by car ; it takes him 8 hours.But if he travels 200km by train and and by car ; he takes 20 minutes longer.Find the speed of the train and that of the car.
November 16, 2016

math
Perfect ! Thanks May God bless you :)
November 16, 2016

math
2 men and 5 boys can do a piece of work in 4 days, while 4 men and 4 boys can do it in 3 days.How long it would take one man alone to do it and how many days ity would take one boy to do it alone?
November 16, 2016

math
if the length of a rectangle is one-third the perimeter of the rectangle,then the width of the rectangle is what fraction of the perimeter?
November 14, 2016

math
5 oranges when removed from a basket containing three more than seven times as many oranges,leave how many oranges in the basket?
November 14, 2016

math
thanks
November 14, 2016

math
a computer cost $40,000 to purchase.Renting the same computer requires making $5000 , non-refundable deposits and monthly payments of $2500.After how many months will the cost to rent the computer equal the cost to purchase it?
November 14, 2016

pre algebra
The ball game took in $1,920 one Saturday. The number of $12 adult tickets was 15 more than twice the number of $5 child tickets. How many of each were sold?
November 13, 2016

pre algebra
Julie went to the post office and bought both $0.49 stamps and $0.34 postcards for her office's bills. She spent $62.60. The number of stamps was 20 more than twice the number of postcards. How many of each did she buy?
November 13, 2016

statistics
the arithematic mean of two numbers is 15 and geometric meanis 12.Find the two numbers and find harmonic mean of these numbers.
November 10, 2016

statistics
A crane is designed in such a way that it can lift a maximum load of 2750kg.Is the crane overload if the container is filled with 50 bags of cement 40kg each and 5 machine of average 100kg?
November 10, 2016

statistics
a person drove on a highway first 5km at a speed of 60km/h ,the second 5km at a speed of 85km/h , third 5km at a speed of 92km/h and last 5km of his journey,the speed was 8okm/h.Use suitable average to find average speed of the journey of 20km.
November 10, 2016

Physics
A particle of mass m1 = 2.5 kg moving along the x axis collides with a particle of mass m2 = 4.9 kg initially at rest. The incoming particle is deflected in the direction 22 degrees above the x axis, whereas the target particle moves off at 15 m/s at 37 degrees below the x ...
November 5, 2016

Algebra
Manuel plans to install a fence around the perimeter of his yard. His yard is shaped like a square and has an area of 40,000 square feet. The company that he hires charges $2.50 per foot for the fencing and $50.00 for the installation fee. Write a function, g(x), to represent ...
October 19, 2016

Math
What is the expression of Aisha has four more than three times as many candies as rachell.
October 19, 2016

Health
An individuals self-esteem stays the same throughout their life: A - true B - false ** Self-actualization means that you focus on yourself all the time A - true B - false ** Which of the following is a skill you can practice to improve your self-esteem? A - Recognize your ...
October 3, 2016

Math
Henry is 3 times as old as Jake. Three years ago, he was 4 times as old as Jake. How old is each boy now?
September 25, 2016

English
Thank you.
September 24, 2016

English
So it ended the curiosity. What does the author mean by "...that many ages has produced"?
September 24, 2016

English
A plan to trick someone?
September 24, 2016

English
I'm having trouble making out what this section means: "...and as soon as her daughter was in a condition, sent her to a monastery in France, the abbess of which had been her particular friend. And thus ended an intrigue which, considering the time it lasted, was as ...
September 24, 2016

English
OK. Thank you!
September 20, 2016

English
Is this sentence grammatically correct? "Many times, women are blinded and silenced by fear, the fear of being different and thinking differently, especially in a culture that oppresses women."
September 20, 2016

stats
The weights (in pounds) of a sample of 36 individuals were recorded and the following statistics were calculated. mean = 160 range = 60 mode = 165 variance = 324 median = 170 The coefficient of variation equals: a.0.1125% b.11.25% c.203.12% d.0.20312% Do I have to find the ...
September 15, 2016

stats
I'm not allowed to use the chart. I have to calculate it by hand
September 15, 2016

stats
The mean of Exam 1 is 80%. The variance is 25. How many students of my IS310 class of 200 students have scores between 70% and 90%, assuming that the distribution is bell-shaped? a.180 b.185 c.190 d.195 I'm not sure how to set up this problem.
September 15, 2016

stats
The answer is 2.6 but I'm not sure how to get that
September 15, 2016

stats
I added his points: 2+4+1+3+4=14 and divided it by 5 to get 2.8 but that's the wrong answer.
September 15, 2016

stats
Jason, a freshman at a local college, just completed 15 credit hours. His grade report is presented below. Course: Calculus, Biology, English, Music, P.E. Credit Hours 5, 4, 3, 2, 1 Grades C, A, D, B, A The local university uses a 4 point grading system, i.e., A = 4, B = 3, C...
September 15, 2016

Math
you are right, I have the variables but I don't know how to simply the expression with all the negatives and positives. This is just an example of what I'm working on: (-2) - -5 + -6. If you can explain that part, I'm sure I can apply it to the rest of my homework.
September 14, 2016

Math
If a= -2, b= -5 and c= -6 than a - b + c = I don't know how to complete this problem?
September 14, 2016

earth and science
what continent lies between 20 and 60 degress north lattitude and between 160 and 50 degrees west longtitude
September 14, 2016

Math
How many times greater is the value of the 2 in the thousands place than the 2 in the tens place in the number 742,025?
August 29, 2016

math
Determine the rate percent per annum if Rs6250 amounts to Rs6760 in six months interest being compounded quarterly.
August 13, 2016

I need help - precalc
List all points on the graph of y=tanx on the interval [π/2,3π] that have a​ y-coordinate of -1/radical3 (Direction- Type ordered pair)
August 4, 2016

Maths
James decided to paint his bedroom. His bedroom walls are 5 metres long and 3 metres high. If 6 litres of paint can cover 10 square metres of the wall, how much paint should James buy to paint all the walls of his bedroom. If paint costs $12.00 per litre, how much will James ...
July 27, 2016

maths
Im very confused could you please give me the break down/formula of how you have got this answer.
July 27, 2016

maths
james decided to paint his bedroom.his bedroom wall are 5 metres long and 3 metres high.if 6 metres of paint can cover 10 square metres of the wall,how much paint should james buy to paint all the walls of his bedroom.
July 27, 2016

math
20% of 200 is what number? 5% of what number is 8.5? What percent of 400 is 60?
May 25, 2016

Percent of loss
Find the loss if necessary round to the nearest cent. Cost $ 523.20 percent of loss 19.2%
May 17, 2016

Percent
Price with tip is $46 Percent tip : 15% Total bill before tip?
May 15, 2016

Algebra
Chantel drew a picture of her dog on a piece of paper that is 12 centimeters long. She used a copy machine to enlarge her drawing. She used the 115% setting to make each new copy. She then used each new copy, using the same copier setting. Enter an explicit and recursive ...
April 27, 2016

Algebra
If sin A=-7/25 and angle A terminates in Quadrant IV, cos A equals.. A. -24/25 B. -7/24 C. 24/25 D. 7/24 PLEASE HELP
April 27, 2016

algebra
a steamboat travels 9 km faster than a freighter. The steamboat travels 147 km/in the same time the freighter travels 120 km/ find the speed of each boat?
April 26, 2016

Geometry-7
Suppose that you know that <T and <S are supplementary and that <T=3(m<s). How can you find m<T.
April 25, 2016

Geometry
Suppose that you know that <T and <S are supplementary and that <T=3(m<s). How can you find m<T?
April 25, 2016

Calculus
What did I do wrong? An object is formed so that its base is the quarter circle y = sqrt(64 − x^2) in the first quadrant, and its cross sections along the x-axis are squares. What is the volume of the object? (Assume the axes are measured in centimeters.) I have already ...
April 21, 2016

Math
Which is considered an outlier? x:1,2,3,4,5,6,7,8,9 y:0.8,2.1,3.1,3.8,5.2,8.4,6.9,8.1,9 (2,2.1) (4, 3.8) (6, 8.4) (9.9) Can someone help, I think it's C or D?
April 21, 2016

Integers
The sum of 6 consecutive integers is 171. Find the smallest of the integers
April 12, 2016

Algebra
THANK YOU SO MUCH
April 8, 2016

Algebra
Thanks
April 8, 2016

Algebra
So far I got x+yi-2+3i=-6+4i x+yi+3i=-6+2+4i x+yi+3i=-4+4i x+yi=-4+i
April 8, 2016

Algebra
Let x and y be real numbers. If (x+yi)-(2-3i)=-6+4i, what are the values of x and y?
April 8, 2016

English
Chose the answer that identifies the three cases of pronouns. nominative, possessive, objective <~ my choice objective, indefinite, demonstrative objective, possessive, prepositional <~ i also feel like its this one too nominative, passive, objective
March 30, 2016

Science
How to work out the weight on mercury Jupiter and Saturn
March 29, 2016

Chemistry PLS HELP!!!
A student collects oxygen gas by water displacement at a temperature of 17 Celsius. A barometer reads 92.3 kPa. What is the pressure of the water vapor? Look it up on a water vapor pressure chart. What is the pressure of the oxygen gas? (Answer: ~14.0 mmHg for water, 678.3 ...
March 28, 2016

Science
Sammy and Andy wanted to measure their classroom. Would this work? Why or why not
March 16, 2016

Math
An observer at point 0 sees airplane P directly over airport a. The observer measures the angle of the plane at 40.5. Find m<P
March 6, 2016

Statistics
To win one version of the New York State lottery, one must correctly select 5 numbers from 49 numbers. How many different selections are possible if: ~ The order in which the selection is made does not matter? ~ The order of selection does matter?
February 24, 2016

6th Grade Science
Day
February 22, 2016

Chemistry
You are given a bottle of dry NaCl. Explain the procedures required to make 900mL of a 0.5M NaCl solution. The formula weight of NaCl is 58.4g/mole.
February 7, 2016

English
Oh, okay! I have been using "I" in instances like that my entire life. Thank you both so much!
January 29, 2016

English
I am typing an essay for my English 101 class, and I have come across a sentence in which Microsoft Word detects a grammatical error. It suggests that I change the pronoun "I" to "me", although, I remember I was taught in school to use "I" in ...
January 29, 2016

geometry
a)3.5 in. x 5.5 in b)1.5 in. x 2.25 in.** c)3.5 in. x 5.25 in. d)2.75 in. x 3.75 in.
January 29, 2016

geometry
2 inch by 3 photograph is enlarged by 75 percent what are the dimensions of the new enlarged photograph?
January 29, 2016

Math
thank u
January 27, 2016

Math
it takes 45 min. to plant 12 plants how long does it take to plant 5
January 27, 2016

Chemistry
How could I tell if an element is stable or unstable? One of the examples is 89/42 Mo The only rule I know entirely is that if the atomic number is greater then 83 then it is unstable. Thanks
January 25, 2016

Math
There are 8 cows 3 sheep and 5 chicken in the field what fraction of the animals are the sheep
January 17, 2016

physics
a book accidentally falls from a shelf 4.2 m high.a librarian is standing nearby and moves .80m,starting from rest, to catch the book.what must be his average acceleration if he catches the book when it is 1.8m above the floor?
January 15, 2016

chemsitry
A graduated tube, sealed at the upper end has a mercury leveling bulb connected to the lower end. the gas volume is 25.ml, when the mercury level is the same in both ends. the barometric pressure is 732 mm Hg. What is the gas volume when the mercury level on the open side is ...
December 2, 2015

math
marsha is 10 years older than john, who is 16 years old ? how old is marsha?
November 23, 2015

math
for grade 3 math-- Explain what happens to the square if you double the length of its sides.Draw 2 squares to support your answer
November 21, 2015

Math
There are 100 apples in a bag 43 of them are red and the rest are green apples what percentage of the apples are green
November 18, 2015

Math
1/20 + 1/15 + 1/30 = 3/60 + 4/60 + 2/60 = 9/60 0.15 = 15 min I think is wrong?
November 16, 2015

Math
Student A, B and C con complete a puzzle in 20 min, 15 min, and 30 min respectively. If all three student work together, how long will it take to complete the puzzle?
November 16, 2015

Math
Thank you
November 16, 2015

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