Wednesday

February 22, 2017
Total # Posts: 8,243

**Math**

hours would be between 0 and 24. Would you want integers - that would include hours only and no parts of hours. Would you want real numbers that would include 1.5 hours, 1.25 hours, etc.

*May 1, 2016*

**Math**

Use a VENN diagram here. 15% like none 45% - overlap like literature 70% - overlap like music These are supposed to add up to 100% The add up to 130 which means that 30% would be in the overlap of liking both .30 x = 60 x = 200 x = 400

*May 1, 2016*

**algebra**

y= mx + b there is no b so b = 0 You will start your graph at (0,0) m = -1.5 means that the graph will slant downward from left to right -1.5 = -3/2 or 3/-2 you can move down -3 and to the right 2 or up 3 and to the left 2 to start your graph. Follow this pattern. x has to = 2...

*May 1, 2016*

**Geometry**

1. A point on the ceiling of a room is 12ft. from each of the vertices of a triangle on the floor whose legs are 6ft. A and 8ft. respectively. find the length of the ceiling. 2. With a 12ft. pole marked in feet, how can one determine the foot of the perpendicular let fall to ...

*April 30, 2016*

**Geography**

Without seeing the PPT, but just reading the sentence. Increase population decrease. Does this make sense to you?

*April 30, 2016*

**MATHS (PROBABILITY)**

45/200=.225 not satisfied (p-hat) 155/200=.775 satisfied(q -hat) Standard dev. The square root of (.225)(.775)/200 Margin of error = z-score times the sd 95% that leaves 5% with 2.5% in each tail or .025 which gives us a z-score from the table or from the calculator of 1.96 1....

*April 30, 2016*

**Cape he loped high school**

You sell lemonade for $2 and orange juice for $3. You sell 100 cups for $240. How many cups of lemonade and how many cups of orange juice were sold

*April 29, 2016*

**Alerbra/Math**

I need help on this question. The supplement or an angle is 18° less than the measurement of the angle

*April 28, 2016*

**Data Analysis**

al

*April 28, 2016*

**ELA**

how does the author reveals the theme of the drummer boy of shiloh

*April 27, 2016*

**math**

Cyndee wants to invest $50,000. Her financial planner advises her to invest in three types of accounts: one paying 3%, one paying 5 1/2%, and one paying 6% simple interest per year. Cyndee wants to put twice as much in the lowest-yielding, least-risky account as in the highest...

*April 27, 2016*

**algebra**

A miniature-doll collector has a total of 254 unique dolls. The collector can afford to add 3 unique dolls a week to the collection. Which algebraic expression represents the number of unique pieces the collector has at the end of w weeks?

*April 27, 2016*

**7th Grade Math**

b - because she starts with 200 and spends x dollars + sales tax .06x x + 0.6x = 1.06x Subtract what you spent with tax. 1.06x from the 200.

*April 26, 2016*

**Algebra**

x + y = 12 x - y = 4 Add the two equations together to eliminate the y. 2x = 16 x = 8 so y = 4 Check these values in the original equations.

*April 26, 2016*

**Stastics**

correct

*April 26, 2016*

**math**

Richard because a 16 x 16 grid has more squares than a 10 x 10 grid. 1/4 of a larger number gives us a larger number. They each shade a different number because 1/4 of 10x10 is a different number than 1/4 of 16 x 16.

*April 26, 2016*

**math**

80 seats Multiply 80 by .75 to get your answer.

*April 25, 2016*

**Length of similar shapes**

I answered this below just a few minutes ago.

*April 25, 2016*

**Math**

I wrote tan of 30 instead of tan 31 If you use tan 31, you should get 1338.

*April 25, 2016*

**Math**

Tangent = opp/adj tan 31 = x/2227 find tan 30 degrees and multiply that answer by 2227.

*April 25, 2016*

**math**

Use t and substitute into the equation. D = 5 + 5(0) = 5 D = 5 +5(1) = 10 etc.

*April 25, 2016*

**Math, please help**

How about the time it takes Joe to complete some task. He takes more time that Steve. 8 times 3 minutes less than .. can you do the problem now?

*April 25, 2016*

**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*

**Science Help**

It is C. But Damon is not a hacker, this is a fake Mrs. Sue.

*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*

**Math**

Hi, Can you please show the steps for C(10,8)(1/2)^8 (1/2)^2 + C(10,9)(1/2)^9(1/2) + C(10,10) (1/2)^10 to = (1/2)^10 ( 45 + 9 + 1) I am a bit confused. Thank you in advance :)

*April 7, 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*