Saturday
April 19, 2014

Posts by Daniel


Total # Posts: 800

physics
In a water park, people walk up a ramp before diving into the water below. If they cover a horizontal distance of 100 meters before diving down 50 meters, what is the angle made by the ramp with the ground?

CALCULUS ECONOMICS
First question: Q=440 and P=660. Second question: s=100

physics
How to calculate the force required to move a 6.12Kg weight up a 10degree friction rig? I have done experiments on the friction rig, adding weight until the sliding weight moved, but the calculated results do not match up. Can anyone help?

Statistics
2. On a certain anxiety questionnaire, the population is known to have a mean of 12 and a standard deviation of 2.3. A higher score represents higher levels of anxiety. Participants in a new relaxation program complete the questionnaire after completing the program, and have a...

Statistics
1. A company decides to add a new program that prepares randomly selected sales personnel to increase their number of sales per month. The mean number of sales per month for the overall population of sales people at this national company is 25 with a standard deviation of 4. T...

Algebra
Solve for x: h=(k/4)(x-3L) Solve for B: v-6Bxk=7B Solve for S: z+(1/7)sk=(1/6)yk^2 Solve for x: 3F=10hx+10hv+10xv

algebra & trigonometry
Thank you Steve.

algebra & trigonometry
The area of a rectangle is 28 square inches. The length is 8 more than thrice the width. Find the length and the width. Thanks

algebra & trigonometry
x(2x+5)=12 2x^2+5x-12=0 (x+4)(2x-3)=0 2x-3=0 2x=3 x=3/2 3/2(2(3/2)+5)=12 3/2(3+5)=12 3/2(8)=12 24/2=12 12=12 width=3/2 length=8

algebra & trigonometry
Is w=-4 the correct answer? thanks

algebra & trigonometry
The area of a rectangle is 12 square inches. The length is 5 more than twice the width. Find the length and the width. Thanks

algebra & trigonometry
Thanks Steve.

algebra & trigonometry
The sum of two numbers is 210. If one number is the square of the other, find the set of numbers. Thanks

courtesy
Thank you Writeacher.

courtesy
How can i thanks someone for their help?

algebra and trigonometry
Thank you Steve

algebra and trigonometry
Thank you Steve.

algebra and trigonometry
At a college function, a total of 180 tickets were sold. The tickets were priced at $5, $10, and $15, and the money collected that day was $1,900. The sum of the numbers of $5 and $15 tickets sold was twice the number of $10 tickets sold. Find the number of each type of ticket...

Statistics
I found the mean but i do not know what the scores are. help. thanks

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 hav...

Statistics
My bad. Thanks.

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 hav...

algebra & trigonometry
Thanks Steve.

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

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

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

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.

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

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...

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.

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 diet...

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

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

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

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

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

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 Valentin...

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 Valentin...

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?

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...

science help needed quick fools
how do the circulatory and endocrine systems work together to help maintain homeostasis

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?

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

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

Algebra
Thanks Ms Sue! I see what I did wrong! Thanks!

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?

english grammar
We saw the governor and mayors in a meeting. is governor capitalized?

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.

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

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

Mr Pursley Help
WHY is the question

math HELP
whats the missing information

math HELP
whats the missing information

math HELP
why

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?

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?

5th grade math help
graph each integer on a number line -3

Pre Algebra
208/1000=x/125 How do you solve it or can you

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

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.

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 ???

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?

Ms Sue
why is it not a composite number

Ms Sue
why is it not a composite number

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.

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 =

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?

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

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.

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

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

math help
this is the problem exactly you must choose which is bigger or equal the answer shows the second is greater why

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?

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

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

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

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

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.

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 i...

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 ...

math
Determine the 10th term of the sequence 3,10,28,72,176. state the general term

medical coding
what is the icd9 procedure for suture repair with layered closure of the hand 4.0cm

english
we went to their Fifteith anniversary is 50th capitalized?

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 w...

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?

college algebra I
4v=68 v=68/4 v=17 Vanessa is 17 years old

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?

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 s...

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...

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.... Woul...

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

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

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

math
Jeff takes a loan of R25000 in a period of 5years calculate the interest rate?

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?

math 4th grade
then what do i do with 16/24 and 15/24

math 4th grade
how do you add 2/3 plus 5/8

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

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...

Math
If (Y x 15+20=245), what does Y equal?

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