Wednesday

March 4, 2015

March 4, 2015

Total # Posts: 885

**Statistics**

Age at onset of dementia was determined for a sample of adults between the ages of 60 and 75. For 15 subjects, the results were SumX=1008, and Sum(X-M)^2=140.4. Use this information to answer the following: a. What is the mean and SD for this data? b. Based on the data you ...
*February 10, 2014*

**Statistics**

My bad. Thanks.
*February 10, 2014*

**Statistics**

Age at onset of dementia was determined for a sample pf adults between the ages of 60 and 75. For 15 subjects, the results were SumX=1008, and Sum(X-M)^2=140.4. Use this information to answer the following: a. What is the mean and SD for this data? b. Based on the data you ...
*February 10, 2014*

**algebra & trigonometry**

Thanks Steve.
*February 9, 2014*

**algebra & trigonometry**

The profit of an organization is calculated by the function P(x) = x2 – 4000x + 7800000, where x is the number of units sold. If the net profit is 3800000, find the number of items sold. Thanks
*February 9, 2014*

**algebra & trigonometry**

At a grocery store, the number of customers arriving per hour is shown by the function f(x) = 2x + 1. Find the number of customers that arrived in the 6th hour. Thanks
*February 9, 2014*

**algebra & trigonometry**

Jerry wants to purchase some items whose cost function is , where x is the number of items. If Jerry spends between $50 and $80, find the minimum and maximum number of items that he can purchase. Thanks
*February 9, 2014*

**algebra & trigonometry**

Jerry wants to purchase some items whose cost function is , where x is the number of items. If Jerry spends between $50 and $80, find the minimum and maximum number of items that he can purchase.
*February 9, 2014*

**algebra & trigonometry**

A person wants to purchase two types of items, A and B, from a shop. She has $200 to spend, and she has to purchase at least 10 items. If the price of one unit of each A and B is $10 and $30, respectively, represent this problem graphically. Thanks
*February 9, 2014*

**algebra & trigonometry**

A school wants to purchase some round tables and some rectangular tables. The costs of one round table and one rectangular table are $20 and $25, respectively. The school wants to spend at most $1,000. Represent this problem for the purchase of x round tables and y rectangular...
*February 9, 2014*

**algebra & trigonometry**

A person wants to purchase two types of items, A and B, from a shop. She has $200 to spend, and she has to purchase at least 10 items. If the price of one unit of each A and B is $10 and $30, respectively, represent this problem graphically.
*February 9, 2014*

**algebra & trigonometry**

A patient is not allowed to have more than 300 milligrams of cholesterol per day from a diet of eggs and meat. Each egg provides 150 milligrams of cholesterol. Each ounce of meat provides 100 milligrams of cholesterol. Write an inequality that describes the patient’s ...
*February 9, 2014*

**algebra & trigonometry**

The sum of three whole numbers is 7. The second number is 1 more than the twice of the third number. The sum of first and third number is 3 less than the second number. Find all the three numbers. Thanks
*February 9, 2014*

**algebra & trigonometry**

The sum of three whole numbers is 7. The second number is 1 more than the twice of the third number. The sum of first and third number is 3 less than the second number. Find all the three numbers. Thanks
*February 9, 2014*

**Math**

six 1- pound bags
*February 4, 2014*

**density and pressure**

calculate the mass of air in a room measuring 5m*8m*10m if the density of air is 1.3kg/m cube
*January 28, 2014*

**physics**

calculate the mass of air in a room measuring 5m*8m*10m if the density of air is 1.3kg/m cube
*January 28, 2014*

**5th grade math help**

trying to check my sons answers "5 3/5 " divided by "2/3" How do i do this mom cant remember
*January 13, 2014*

**Science**

Thanks anon your helpful!!!! do you do Connections Academy?
*January 13, 2014*

**Statistics**

Blossom’s Flowers purchases roses for sale for Valentine’s Day. The roses are purchased for $10 a dozen and are sold for $20 a dozen. Any roses not sold on Valentine’s Day can be sold for $5 per dozen. The owner will purchase 1 of 3 amounts of roses for ...
*January 10, 2014*

**Maths**

Blossom’s Flowers purchases roses for sale for Valentine’s Day. The roses are purchased for $10 a dozen and are sold for $20 a dozen. Any roses not sold on Valentine’s Day can be sold for $5 per dozen. The owner will purchase 1 of 3 amounts of roses for ...
*January 9, 2014*

**Physics**

A proposed space station includes living quarters in a circular ring 46.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?
*December 24, 2013*

**Physics**

A small block of mass m = 1.3 kg slides, without friction, along the loop-the-loop track shown. The block starts from the point P a distance h = 54.0 m above the bottom of the loop of radius R = 19.0 m. What is the kinetic energy of the mass at the point A on the loop? What is...
*December 24, 2013*

**science help needed quick fools**

how do the circulatory and endocrine systems work together to help maintain homeostasis
*December 20, 2013*

**Help me with this science.**

1.A 2.D 3.C 4.A 5.C I hope I really helped
*December 10, 2013*

**Trigonometry**

At a point on a level ground, the angle of elevationof a mountain top B is 42deg36min. At a pointD350 meters nearer the mountain, the angle of elevation is 51deg 43 min. Find the height of the mountain?
*December 1, 2013*

**Chemistry**

Weak polyprotic acids are normally added to Coca Cola to lower its pH to about 2.5 and impart tartness? Show that a two litter cocacola bottled drink that contains 0.057 to 0.084 percent of 75 percent of phosphoric acid by mass,meets this ph requirement. Pka1= 2.12
*November 29, 2013*

**Chemistry**

Weak polyprotic acids are normally added to Coca Cola to lower its pH to about 2.5 and impart tartness? Show that a two litter cocacola bottled drink that contains 0.057 to 0.084 percent of 75 percent of phosphoric acid by mass,meets this ph requirement. Pka1= 2.12
*November 29, 2013*

**math**

HA GAYhsbydekbdudnetyenefs
*November 6, 2013*

**Algebra**

Thanks Ms Sue! I see what I did wrong! Thanks!
*November 5, 2013*

**Algebra**

What is the best estimate for 3 + (-14.9)(-2.3)? a 36 b 31 c 48 d 33 I came up with 36 but my teacher counted it wrong. I reworked it but still come up with A-36. What am I doing wrong?
*November 5, 2013*

**english grammar**

We saw the governor and mayors in a meeting. is governor capitalized?
*October 16, 2013*

**mom needs math help**

can anyone in simplistic terms explain difference between HISTOGRAM and BAR GRAPH i need to explain it to a ten year old.
*October 9, 2013*

**MATH help please**

Identify the missing info that would be necessary to solve the following which type of graph would be more appropriate to represent the number of inches of rain during a 6 - week period a bar graph or a line graph? AND WHATS MISSING
*October 4, 2013*

**math help please**

Identify the missing info that would be necessary to solve the following which type of graph would be more appropriate to represent the number of inches of rain during a 6 - week period a bar graph or a line graph? what is the missing info
*October 3, 2013*

**Mr Pursley Help **

WHY is the question
*October 3, 2013*

**math HELP**

whats the missing information
*October 3, 2013*

**math HELP**

Identify the missing info that would be necessary to solve the following which type of graph would be more appropriate to represent the number of inches of rain during a 6 - week period a bar graph or a line graph?
*October 3, 2013*

**chemistry**

If a gas sample has a pressure of 31.3 kPa at 0.00°C, by how many degrees Celsius does the temperature have to increase to cause the pressure to double?
*October 2, 2013*

**5th grade math help**

graph each integer on a number line -3
*October 2, 2013*

**Pre Algebra**

208/1000=x/125 How do you solve it or can you
*September 29, 2013*

**math**

In a class of 60 student,the number of student who passed biology is 6 more than the number of student who passed chemistry.Every student passed atleast one of the two subject and 85 student passed both subjects
*September 12, 2013*

**math last one help**

a bead shop sells wooden beads for 3 dollars each and glass beads for 7 dollars each Write a function rule to represent the total selling price of wooden (w) and glass (g) beads.
*September 10, 2013*

**5th grade math help**

a bead shop sells wooden beads for 3 dollars each and glass beads for 7 dollars each Write a function rule to represent the total selling price of wooden (w) and glass (g) beads. Is it W t G = 10 ??? or 3 t 7 = 10 ???
*September 10, 2013*

**math last one help**

sally drew a factor tree of a composite number and ended up with 4x4x5x5x3 as the prime factorization. explain what is wrong with this factorization 1. what is the correct prime factorization? 2. what is the composite number that was factored?
*August 29, 2013*

**Ms Sue**

why is it not a composite number
*August 29, 2013*

**5th grade math help**

my mommy and daddy cant explain explain what is wrong with the reasoning number 5 is a composite number because it has the factors 2 and 2.5 i know its a prime number but i cant explain the answer to the question above.
*August 29, 2013*

**math**

mean = ∑x/n 6 = (x+y+z)/3 9 = (x+y+z+t+u+v+w)/7 63 = (x+y+z+t+u+v+w) 18 = (x+y+z) mean = (63-18)/4 =
*August 24, 2013*

**math**

C(11,0) + C(11,1) + C(11,2) + C(11,3) the problem says "up to 3"
*August 15, 2013*

**physics**

A steel section of the Alaskan pipeline had a length of 65 m and a temperature of 22° C when it was installed. What is its change in length when the temperature drops to a frigid -37° C?
*July 25, 2013*

**physics**

a train's stopping distance even when full emergency brakes are engaged is 1.3 km. If the train was travelling at an initial velocity of 90km/h(forward), determine its acceleration under full emergency braking
*July 3, 2013*

**math**

A kayaker paddles across a river at a constant speed of 4 miles per hour and a bearing of N 60 degrees E. Which current vector results in the kayaker's actual speed being 5.9 miles per hour and the kayakers actual direction being N 70 degrees E.
*July 3, 2013*

**math help**

question says choose which is greater or are they equal or not enough info fifty percent can be represented by n --- 50 a. n b. 45 answer is b is greater please tell me why
*June 26, 2013*

**math 4 grade**

question which is greater - are they equal - or not enough info 18K 17K the answer says its not enough info but 18 is always bigger than 17
*June 26, 2013*

**math help**

this is the problem exactly you must choose which is bigger or equal the answer shows the second is greater why
*June 26, 2013*

**math help**

the land area of a country with 20 people per square kilomoter or the land area of a country that measures 500,000 square kilometers which is bigger and how did you determine this?
*June 26, 2013*

**math 4th grade**

the land area of a country with 20 people per square kilomoter or the land area of a country that measures 500,000 square kilometers can anyone explain how to do this
*June 26, 2013*

**math 4th grade**

the land area of a country with 20 people per square kilomoter or the land area of a country that measures 500,000 square kilometers can anyone explain how to do this
*June 26, 2013*

**math 4th grade**

the land area of a country with 20 people per square kilomoter or the land area of a country that measures 500,000 square kilometers can anyone explain how to do this
*June 26, 2013*

**math**

Kate bought a new car priced at $21,300 with 15% down and the balance in equal payments over 4 years at 7% compounded monthly. Determine the size of the monthly payments? The answer is $433.65 please show me the steps
*June 10, 2013*

**petroleum engineering physics **

Vector A has a magnitude of 5.00units,and B has a magnitude of 9.00units.The two vectors make an angle of 50.0degrees with each other .Find A.B.
*June 9, 2013*

**algebra**

Let D = {(a,b,2a): a,b all real numbers} The set of vectors in R^3 with last entry twice the first. E = span{(1,0,2),(2,-1,4),(0,-3,0)} Prove that D = E I first made an augmented matrix to find out that there is a free variable of x3. Showing that there is a solution where D ...
*June 7, 2013*

**math**

Adam took five tests and received a grade for each of them. The first test was 92%, the second test was 83%, and the mean of the five tests was 85%. What can you conclude? a. the lowest test score. b. the highest test score. c. the mean of the last three tests. d. the mean of ...
*June 4, 2013*

**math**

Determine the 10th term of the sequence 3,10,28,72,176. state the general term
*June 3, 2013*

**medical coding**

what is the icd9 procedure for suture repair with layered closure of the hand 4.0cm
*May 27, 2013*

**english**

we went to their Fifteith anniversary is 50th capitalized?
*May 21, 2013*

**7th Grade Math**

A pentagonal prism has dimensions that are four times the dimensions of a similar pentagonal prism. So its volume is _____times the volume of the smaller prism. A) 64 B) 8 C)16 D)4 Would it be A) 64? Next Question: If the dimensions of a cylinder are doubled the surface area ...
*May 20, 2013*

**7TH GRADE MATH**

If the radius of a cylinder is 1.8 meters and its height is 7 meters, the volume of the cylinder is approximately 71.2 cubic meters...true or false I say false because shouldn't it be 71.2 cubic 3? Am I correct?
*May 19, 2013*

**college algebra I**

4v=68 v=68/4 v=17 Vanessa is 17 years old
*May 13, 2013*

**Math**

The area of a hexagon is 42 square cm. If all the dimesions of the hexagon are multiplied by 3, what will be the area of the new figure? a) 126 cm2 b) 252 cm2, c) 378 cm 2 d) 14 cm2 I took 42 cm x 3 and got 126 cm2 did I work this correctly?
*May 7, 2013*

**Algebra 1**

You can mow your whole lawn in 45 minutes, and your neighbor can mow your whole lawn in 30 minutes. How long would it take you to mow the lawn together? Clearly show and explain each step for full credit. Using rational applications A. Write an equation that could be used to ...
*May 5, 2013*

**Math**

Ariel's garden is planted in the shape of a square and has an area of 81 square feet. If she plans to put a fence around the perimeter of the garden, how much fencing will she need? A) 18 ft, B) 41 ft C) 36 ft D) 9Ft I came up with D 9 foot but apparently I didn't work...
*May 1, 2013*

**7th Grade Math**

If a diameter of a circle (which is 18 inches) is tripled, can the expression 9 (254.34 in square) be used to find the new circle? I know the answer is yes but I can't figure out how you work it! I come with 9(1,107.36 in square) but apparently that is not correct.... ...
*April 30, 2013*

**Chemistry**

imagine that you have a 100 ml of HCl, after adding 50 ml of 1M NaOH, how many moles of OH did you add
*April 29, 2013*

**Chemistry**

imagine that you have a 100 ml of HCl, after adding 50 ml of 1M NaOH, how many moles of OH did you add
*April 29, 2013*

**Math**

A quarter has a diameter of approximately 24 millimeters. What is the area of the quarter? Did I work this right? A= 3.14 (12) A=3.14 (144) A-452.16 mm Thanks
*April 26, 2013*

**math**

Jeff takes a loan of R25000 in a period of 5years calculate the interest rate?
*April 26, 2013*

**math**

9 fair coins are independently tossed in a row. Let X be the random variable denoting the number of instances in which a Head is immediately followed by a Tail during these 9 tosses. The variance of X has the form ab, where a and b are coprime integers. What is the value of a+b?
*April 18, 2013*

**math 4th grade**

then what do i do with 16/24 and 15/24
*April 16, 2013*

**math 4th grade**

how do you add 2/3 plus 5/8
*April 16, 2013*

**science**

calculate the time taken by a train to travel 1000m if its initial speed is 30m/s and it has an acceralation of 0.1m/s
*April 16, 2013*

**Chemistry**

DrBob222's answer is wrong. You mean to put Cd/Cd^2+ is -0.403, not 0.403. Answer is: 3Cd^2+(aq) + 2In(s) --> 3Cd(s) + 2In^3+(aq) this is right because the short hand notation is: In(s)|In^3+ (aq)||Cd^2+ (aq)|Cd(s) And the Anode is always on the left. ~Information valid...
*April 14, 2013*

**Math**

If (Y x 15+20=245), what does Y equal?
*April 14, 2013*

**Calculus**

Estimate the area under the graph of 25−x 2 from x = 0 to x = 5 using 5 left rectangles. b. Sketch for yourself the graph of f and the rectangles. Is this left sum an overestimate or underestimate? Enter OVER or UNDER. c. Now use 5 right rectangles to estimate the area. ...
*April 12, 2013*

**Math**

In 1800, the area of the United States was 891,364 square miles. After the Louisiana Purchase in1803,the area increased by about 93%. What was the area of the United States after the Louisiana Purchase? Round to the nearest square mile
*April 11, 2013*

**Calculus**

An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?
*April 11, 2013*

**Calculus**

An animal population is increasing at a rate of 150+20t animals per year. By how much does the animal population increase between year 5 and year 8?
*April 11, 2013*

**english**

Mrs. Jones said that we will have a fire drill at 8:45 on Thursday. I am confused is what she said in quotes and should the word that be taken out - the instructions says to correct sentence.
*April 9, 2013*

**english**

Sam and John are building a new house in Florida. is it house or home?
*April 9, 2013*

**english**

How many fish do you want to catch?" The fishing guide asked us. is the T in the capitalized
*April 9, 2013*

**math**

Wondering the answers to these: Find the value of each of the following. Leave your answers as fractions where appropriate. [I did these myself but need to answer-check] a) log[base4](1/8) b) 10^(-10log3) c) 2log[base3](9) d) log[base3](3)^(2x) ans: a) -3/2 b)(1/3)^10 c) 4 d)...
*April 7, 2013*

**chemistry**

What are the freezing point and boiling point of an aqueous solution of 15.5 g glucose(C6H12O6) dissolved in 150 g of water?
*April 7, 2013*

**chemistry**

How many grams of H2SO4 are contained in 4.5 L of .30N (N standing for normality) sulfuric acid? Help would be much appreciated.
*April 7, 2013*

**math**

Great this helps alot, was worried I screwed up something
*April 7, 2013*

**math**

The Question is: The value of a new car depreciates at a rate of 12% per year. 1)Write an equation to represent the approximate value of a car purchased for $23 000. 2)Determine the value of the car two years after it is purchased. 3)Approximately how many years will it take ...
*April 7, 2013*

**math**

Thanks, glad I can correct that!
*April 7, 2013*

**math**

One more question: Beginning with the function f(x) = (0.8)^(x), state what transformations were used on this to obtain the functions given below. a) g(x) = - (0.8)^(x) - 2 b) h(x) = (1/2) (0.8)^(x-2) c) k(x) = (0.8)^(-3x+9) These are the answers I have, (may be incorrect) a) ...
*April 7, 2013*

**math**

Wow thanks guys, perfect feedback. Much appreciated
*April 7, 2013*

**math**

Confused! So here is the question: Inflation is currently causing the cost of items to increase by about 2.5% per year. In 2009 a litre of gasoline costs approximately $0.90. What will it cost to fill a 60 litre gas tank 10 years from now. Round your answer to the nearest ...
*April 7, 2013*

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