Thursday
August 25, 2016

Posts by John

Total # Posts: 7,877

Math
m = 5k because every value in M is 5 times as big as the value in K. To help you do others like this problem divide each K into each M to see if you get the same value.
April 25, 2016

math
take away means to subtract. we will subtract 30 from j j - 30 or j minus 30
April 25, 2016

maths
Are you adding and rounding? 3 1/5 + 1 + 2/5 = 4 3/5 since 3/5 = .6, I would round to 5.
April 25, 2016

Math
16 more than a number divided by 4 16 + n/4 Antoine is correct. Zach's would be the sum of 16 and n divided by 4.
April 25, 2016

length of similar shapes
If they are similar then there sides are all in the same proporiton. 25/10 = 2.5 the ratio is 2.5 4cm long times 2.5 = 10 How would you find the width 7cm times ___ = ____
April 25, 2016

chemistry
25(.5) = 25(x)
April 25, 2016

Math
On your graph on the x-axis, you will have time 1, 2, 3, 4, On your y-axis put the miles d = 20t
April 25, 2016

Math
t = 19+ 15 L I think your teacher will want the 19 included in the total time. If not, then t = 15L
April 25, 2016

Stastics
I believe it is n-2 when doing a two sample t.
April 25, 2016

Stastics
I agree with c.
April 25, 2016

Itt tech
All you do is substitute -3 for x. 5(-3) + 8 = 0
April 25, 2016

Stastics
The 99% confidence interval is wider than the 95%. If something is in the 99% then it has to be in the 95% interval Since it seems that a and d would be correct, it makes me think that your teacher is trying to show you that confidence intervals can always be different because...
April 25, 2016

stastics
for t to get larger you will need the numerator of the problem to get larger and the denominator to get smaller. The formula has the difference between the means divided by the standard deviation. I would say d. The standard deviation decreases and the difference between the ...
April 25, 2016

Statistics
9% more Do you want to do a two sample test to see if 41% is statistically greater than 32%. If so, we need more information.
April 25, 2016

Math
rectangular area for cattle and uses a straight portion of a river as one side of the​ rectangle, as illustrated in the figure. Note that there is no fence along the river. If the farmer has 16001600 feet of​ fence, find the dimensions for the rectangular area that...
April 24, 2016

counseling
Don't see the choices.
April 24, 2016

Algebra
1-3 are correct. I don't see the x in #4 You would chose your x, so the value on the radical sign would never be negative. It would have to be > or equal to zero. If your question is square root of (3 +3x) then you want this expression to be equal to or greater than ...
April 24, 2016

Stastics
I agree with your confidence interval. Nice work. Since .80 isn't within the interval, you are correct to say no as the answer to that question. random variable p should be the percent or proportion of student who drive.
April 24, 2016

Business Math
Lisa Richter deposited $5,000 at 4% compounded semiannually for three years. At the beginning of the fourth year, Lisa deposited $2,500. What would her balance be at the end of five years assuming she is still earning 4% compounded semiannually?
April 24, 2016

Trigonometry
Right triangle tan of 38 = x/125 Find the tan of 38 and multiply by 125 to get your answer.
April 23, 2016

Math
12 because 12 divides into both 36 and 12 If you were asked to factor,the answer would be: 12(3x+y)
April 23, 2016

Chemistry
At equilibrium at 1.0 L vessel contains 22.00 mol of H2, 20.00 mol of CO2, 13.00 mol of H2O, and 5.700 mol of CO at 427◦C. CO2(g) + H2(g) ⇀↽ CO(g) + H2O(g) What is the value of K at this temperature for the reaction?
April 23, 2016

math
Question 1 To make the confidence interval, you need to find the mean and the standard deviation for the data. Since this is a small sample and you don't know the population standard deviation, you will use "t" instead of "z". Using a t-table you will ...
April 23, 2016

LA
There is no passage.
April 22, 2016

math HELP
can't see the graph.
April 22, 2016

stat
50-60/20 = -.5 z score Look that up to find the % You want z<-.5 10-60/20 30-60/20 -2.5 and -1.5 are the z-scores find the % by finding -2.5<z<-1.5 Can you submit your answers so they can be checked.
April 22, 2016

math
y = 25+10x or y = 10x+25 y = 18 + 15x or y = 15x + 18 Here are you two equations. to solve by substitution 10x + 25 = 15x + 18 Solve for y and then find x.
April 22, 2016

Dosage calculations
Thank you!
April 20, 2016

Dosage calculations
1000 mL has been infused in 8 hours at 150 ml/hr. After 3 hours, how many have been infused? 1000/8 = 125 ml 125 x 3 =375ml? Therefore after 3 hours 375ml has been infused Is this correct?
April 20, 2016

Chemistry
We did an experiment where we had to figure out the amount of water molecules in CuSO4xH2O (x being the value to find). If the stirring rod used was wet and was used to stir the beaker would this result in a higher x value? Is this a experimental or human error. Obviously this...
April 20, 2016

Physics
a 2x10^-6 point charge travels a distance of.002m between two parallel charged plates from the negative end toward the positive end. The field has a strength of 500 N/C What is the change in voltage?
April 20, 2016

child development
the continues development views hold that
April 19, 2016

Physics
An electric field measured near a point charge of 3.0 X 10^-6 C has a strength of 1.50 X 10^5 N/C How far is the point from the source charge
April 19, 2016

Health
The lungs are? A. Connected by the mediastinum B. Separated by the mediastinum C. Divided into 7 lobes D. Divided into 9 lobes C?
April 19, 2016

Physics
If one charge (+5 uC) is placed at origin and a second charge of (+7 uC) at x = 100 cm, then where can a third charge be placed and of what size, so that it has no electrostatic force on it. I know the magnitude of the force will not matter, however, I'm not sure as to how...
April 18, 2016

chemestry
0.63g of pb powder were disolved in excces nitrate(v) aci to forn leadnitrate solution, all the lead nitrate solution were reacted with sulphate,give the ion equationof the reaction between lead nitrate and sadium sulphate solution?determine the mass of the lead salt formed in...
April 16, 2016

calcus
water partially fills a hemispherical bowl of radius 40cm so that the depth of the water is 20 cms. write down an integral representing the volume of the water in the bowl
April 14, 2016

Dosage calculations - Bob, please help
Weight - 20 pounds 6 ounces Ordered dose - 1.5mg per kilogram per day recommended dosage from drug label - 3mg every 8 hours. 1.What is the individual dose? to find the individual dose i'll first convert pounds to kg which is 9.26 kg. I will then multiply 1.5 x 9.26 = 13....
April 13, 2016

Dosage calculations please
What is the maximum dose client could have? I would multiply the weight x the recommended dose which equals to 863.5 mL.
April 13, 2016

Dosage calculations please
Nurse orders 375mL every 8 hours, client weighs 38 pounds. Recommended dose is 50ml 1. pounds to kg -> 17.27 kg 2. individual dose is 17.27 x 375 = 6476.25 mL 3. Daily dose is 6476.25 x 3 because 24 hours divided by 8 = 3. therefore the daily dose is 19,428.75 mg. Is this ...
April 13, 2016

Dosage calculations please
Ahh and I would multiply 38 x 4 to get the daily dose because 24 hours/6 = 4 therefore the daily dose is 152mg
April 13, 2016

Dosage calculations please
The nurse is to administer the recommended dose of Garamycin 2 mg per kg every 6 hours. The child weighs 42 pounds. 1. What is the weight in kg? 2. what is the daily dose? Round to the nearest whole number. 3. What is the individual dose? 1. 42/2.2 = 19.09 2. daily dose = 19....
April 13, 2016

Maths Physocs
J and K are cycling together. K is riding a bike with a wheel radius of 35cm, crank wheel radius 11cm and chain wheel radius 4cm. She is pedalling at 60 rpm. How fast is she going? -->What is the significance of giving 3 different types of radius? --> know to find ...
April 12, 2016

Social Studies Please tell a summary
Can some one HELP!!!!! Select one form in movement from the progressive era. Provide details and examples that Sapor how this movement change South Carolina.
April 12, 2016

yakima community college
can't you just use the 5/9 celsius to fahrenheit conversion equation? Don't be lazy, just write down the formula and plug in the numbers where there are letters
April 11, 2016

help my son's math
Jamie = Antonio + 8 Antonio = 3 times Beth If Beth completed 6 then Antonio completed 18 Jamie completed 26
April 11, 2016

Math
This is a probability problem 5!/(3!2!) =10 different ways.
April 11, 2016

Health
The answer is not B
April 11, 2016

Health
What?
April 11, 2016

Health
The skin helps eliminate waste from the body through _____. A. Striation B. Respiration C. Irritation D. Perspiration B?
April 11, 2016

Please Help ! Calculus
x + y = 42 y = 42-x x(42-x) 42x-x^2 derivative 42 -2x =0 x=21 y =21
April 10, 2016

Geometry
An easier way would be to find the perpendicular and use pythag. Thm c^2 = a^2 + b^2 15^2 = 4^2 + b^2 b = 14.45 A = 1/2 bh A= 1/2 8 x 14.45 you will get the same answer as above. Depending on the level you are working at this might be what your teacher is looking for.
April 10, 2016

Math
I have 3 nickels, 1 quarter, and 1 penny in my pocket. If I pick out a coin from my pocket, do not replace it, then pick out a second coin from my pocket, what is the probability that the second coin that I pick out of my pocket is a nickel? So far I have come up with this: P(...
April 9, 2016

physics
Here is an equation called Coulomb's Law that might help you find the answers: Force of electricity= k x (q1 x q2)/r^2 k= Coulomb's constant= 9x10^9 q1= charge 1 q2= charge 2 r= distance between two charges Just plug in numbers to the equation and find the force. Then...
April 9, 2016

Pysics
Remember that the net momentum before a collision is equal to the net momentum after a collision. Let momentum= p, mass= m, and v= velocity. Even though a pound is not a measurement unit of mass, it is linearly correlated with it, so let's use pounds to measure measure ...
April 9, 2016

Biology
The cells in them are the ones that control them
April 9, 2016

Chemistry
what mass of hydrogen chloride gas is required to produce 250 ml of hydrochloric acid solution with a pH of 1.57
April 9, 2016

Chemistry
what mass of hydrogen chloride gas is required to produce 250 ml of hydrochloric acid solution with a pH of 1.57 pH 1.57 H3O = 10^-1.57= .027mol/L .027(4)= .108mol/L 36.46(.108)=3.9g
April 8, 2016

Algebra
A bottle rocket launches into the air. The equation h=-16t^2+64t+9 gives the height of the ball, h in feet, as a function of t, number of seconds after launch. What is the maximum height the ball reaches? How many seconds does it take the ball to reach that height?
April 8, 2016

Maths
2x^3 - 12x^2 - 32x
April 7, 2016

Dosage calculations please
Ordered: Tegretol 150 mg po BID Supplied: Tegretol 20 mg / tablet 1. How many tablets would you administer per dose? 2. How tablets would you administer per 24 hours? 1. 150/20 x 1 = 7.5 tablets per dose 2. 150mg/2 = x/24 =1,800 tablets ? I am very confused on second question.
April 6, 2016

Dosage calculations
I did this 0.5/ 100 x 1 = 0.005 but the answer is 1.5ml.
April 5, 2016

Dosage calculations
The physician ordered 0.5 mL of meperidine hydro chloride. The med's drug label reads 100mg/mL. The patient will receive __________? I have no idea how to do it please.
April 5, 2016

Math
The measures of the sides of a right triangle form an arithmetic sequence of common difference 2. What are these measures?
April 5, 2016

Chemistry
I'm stuck.
April 5, 2016

Chemistry
Also I found the Ksp values from my text. It says Pb = 2.53E–8 and Sr = 3.44E–7. Could you re-write with those values so that I can understand it better please? I really appreciate your help.
April 5, 2016

Chemistry
Hey Dr. Bob. I'm not sure where you got the 1.6E-8 from?
April 5, 2016

Chemistry
A solution contains 0.0390 M Pb2 (aq) and 0.0390 M Sr2 (aq). If we add SO42–(aq), what will be the concentration of Pb2 (aq) when SrSO4(s) begins to precipitate? I am just completely lost on this one.
April 5, 2016

math
The age of a man and his son adds up to 36years old.if the father is 30years more than his son .how old is the father and the son?
April 4, 2016

Statistics
A sign on the petrol pumps of a chain of petrol stations encourages customers to have their oil checked, claiming that one out of every four cars should have its oil topped up. Assuming this claim is true: (b) What is the probability that at least half of the next 10 cars ...
April 4, 2016

Business Statistics
(a) Of the next 10 cars entering a petrol station, what is the probability that exactly three of them should have their oil topped up?
April 4, 2016

History Help!
Is it d?
April 4, 2016

History Help!
It says that they wanted the rich land, but none of my answers relate to this. @Reed
April 4, 2016

History Help!
1.How did New England's textile industry affect women? -New technologies required men to work far from their wives and families -The jobs in this field were considered "mens work," and women were not hired -The need for unskilled labor provided low-paying factory...
April 4, 2016

chemistry
Given overall reaction: P4 + 10Cl2 ---> 4PCl5 Delta H for the reaction = ? PCl5 -----> PCl3 + Cl2 Delta H = +157 kJ P4 + 6Cl2 ----> 4PCl3 Delta H = -1207 kJ Calculate the Delta H for the overall reaction.
March 31, 2016

Physics-mechanics
A child's toy car runs off a battery that can supply 105 Wh of energy. If all losses (including friction) consume 45.0% of the energy available and the rider and car have a combined weight of 910 N, determine the height of the largest hill the child can climb in the car in...
March 29, 2016

algebra
I have a rectangular prism with a volume of 48 cubic feet and a height of 3/4 foot. The base of the rectangular prism is not a square and the width is greater than 2 feet. What is the length and width of the rectangular prism?
March 28, 2016

chemistry
Calculate the pH after addition of 16.36 mL of 0.1349 M HBr to 25.00 mL of 0.1444 M NH3. Kb(NH3) = 1.800e-5. Answer: 9.059 PLEASE SHOW STEPS!
March 27, 2016

math
The new capacity is 4+x=y Where x is the pure anti-freeze, y is the total capacity. 4+x=y 0.25(4)+x=0.5y 1+x=2+0.5x x=2 He needs to add 2 gallons of pure anti-freeze.
March 26, 2016

Math
f the air temperature at ground level is 90degrees°​F, the air temperature x miles high is given by ​T(x)equals=90minus−19x. Determine the altitudes at which the air temperature is from 52degrees°F to 42.5degrees°F.
March 25, 2016

statistics
what is the range of probability
March 24, 2016

Physics
Amotorvehicle of mass 1200kg is travelling along alevel road at 54km/hr.The breaks are then applied and the speed of the vehicle reduced to 18km/hr over adistance of 50M .if the afriction motion resistant is constant at 160N .calculate the effective braking force of the brakes...
March 24, 2016

Statistics
A flower shop wishes to add the valuable Waimea orchid to its product list. They purchase a large shipment of bulbs from a supplier in Kauai. It is established by Mendelian theory that the predominant colors in the Waimea orchid (blue, red, violet, orange) will occur with the ...
March 24, 2016

Statistics
A marketing researcher decides to test whether coffee drinkers have a favorable view of coffee labeled as “Fair Trade.” He has 15 randomly selected coffee drinkers taste his company’s Morning Blend, then the exact same coffee labeled Fair Trade Blend. They are ...
March 24, 2016

Chemistry
mols H2=1.106 mols I2=0.218 molar mass of H2=2.016 and divide 2.23g by 2.016 moles of H2 to moles of HI=2.212 moles of I2 to HI=0.436 so limiting reagent is I grams of HI=511.6 (2*255.8) percent yield=8.4% (43.1/511.6) What did I do wrong?
March 22, 2016

Chemistry
What is the percent yield of the reaction below if 2.23g of hydrogen gas react with 55.3 g of iodine to produce 43.1g of HI. use the equation below: H2+I2=2HI the answers: a) 21.8 b) 77.3 c) 33.7 d) 87.1 I started by trying to find the limiting reagent. I multiplied the 2.23 g...
March 22, 2016

Physics
An electric kettle has a power of 1.2kw. How long will it take to heat 3 kg of water to the from 20¡ãC to 100¡ãC?
March 22, 2016

Trigonometry
A wheel has a 12 inch radius rotating at 620 RPM. What is the speed of the car in MPH?
March 21, 2016

electrical electronics
Find the value of the remaining components of a common emmitter amplifer circuit given Ic=3mA, Tr=ZTx300, hfe=80, F=40Hz, Ve=2.5 show workings
March 20, 2016

electricity and magnetism
Four equal point charges, +3micro coulomb, are placed at the four corners of a square that is 40cm on a side. Find the force on any one of the charges.
March 19, 2016

Physics
A device that can alter the resistance in a circuit is known as a: a. switch b. potentiometer c. circuit breaker d. ammeter
March 18, 2016

math(mechanics static)
Three identical sphere with the same size and same weight. A 100N sphere is placed at th top of the 3 spheres. Find the contact force between the 3 spheres & the 100N sphere.
March 15, 2016

life orientation
Four aspects when choosing subjects
March 15, 2016

Physics
a speeding car is driving at 120 km/h when it passes a police cruiser that is driving at 100 km/h. One second later, the police cruiser accelerates uniformly at 15 km/h until it reaches a speed of 135 km/h. how long does it take the police cruiser to catch the car
March 10, 2016

Math
Convert 9 pounds 6 ounces into Kg.
March 9, 2016

Math
How to solve this problem? Here is what I have done so far. question --> 12(1/2)% x (1/2)/(3/4) First i solved the fractions (1/2) x (4/3) =4/6 I changed the 12(1/2)% into a decimal by solving 1/2, which is .5 which equals to 12.5 Answer is 1/12 but I have no idea how it ...
March 9, 2016

math
log(3) 9 = 2 The 3 that I put in ( ) should be lowered to a subscript.
March 9, 2016

math
This is similar to one I answered yesterday. between 0 and 5 inclusive the function = 2 between 5 exclusive and 10 inclusive function = 11-t between 10 exclusive and 14 inclusive function = 7 The cheapest would be 2 so that would be Nov. 7 and 8. c(12) used last one 7 c(5) use...
March 9, 2016

algebra
x = amount at 12% y = amount at 8% x + y = 12000 .12x +.08y = 1240 multiply by 100 to clear decimals 12x + 8y = 124000 -8x -8y = -96000 4x = 28000 x = 7000 y = 5000
March 9, 2016

Pre-algebra
I agree.
March 9, 2016

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