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Posts by denise

Total # Posts: 509

Chemistry - Gravimetry
If 0.8000 g of a mineral yields 0.2400 g of NaCl + KCl, and this mixture contains 58.00% of Cl, what is the percentage of Na2O and K2O in the mineral? I already tried solving it and I got 12.69% Na2O and 3.84% K2O. However, I checked the answer key and the answers there are ...

Geometry
What is the most precise classification of the quadrilateral formed by connecting the midpoints of the sides of the isosceles trapezoid?

Physics
At what altitude above the Earth's surface is the gravitational field strength equal to g/7? .981 = -(1.0003322(6,371/6,371+h))^2)

Chemistry
A lead fishing weight cotains 0.12 mol of lead atoms. What is its mass?

Math
Two bus services A&B arrive at the station. service A arrives every 15 minutes, service B arrives every 20 minutes. The first bus arrives at 8 o'clock. When will both buses arrive at the station again?

algebra
In 2020 a​ city's budget is projected to be ​$3131 million. This is approximately StartFraction 14 Over 3 EndFraction 14 3 of the 2000 budget. What was the​ city's budget in​ 2000?

liberal arts math
A population of 240 animals decreases at an annual rate of 10%. Find the multiplier for the rate of exponential decay.

Algebra
The function g(t) = 2t represents the number of guitar lessons, g(t), you can compete in t months. How many guitar lessons can you complete in 7 months? Provide your conclusion as a complete sentence. thanks for help

Algebra II
Plus you didn't even answer it soooooo...

Algebra II
Ok I'm thankful for the help but jeez you don't have to be like that. This is the second time you've done this. Maybe don't be a jerk about it?

Algebra II
Given the triangle below, find sec X, tan X, and cos X in fraction form. *right triangle, hypotenuse goes from top right to bottom left, bottom side is longer than top side. Top right point is z, left point is X, bottom right angle (the right angle) is Y. The short side, ZY=15...

HELP PLEASE
PLEASE HELP ME

Algebra II
The sum of the reciprocals of two consecutive positive integers is 17/12. Write an equation that can be used to find the two integers. What are the integers?

science
The element Astatine has 85 protons, as well as 85 electrons. Also: The number of protons is equal to the atomic number (the big number by the atom on a periodic table) The number of electrons is equal to the number of protons The number of neutrons is equal to the atomic mass...

Algebra II
In triangle ABC, C is a right angle. Side c=9 and side a=5. What are the measures of the remaining sides and angles, in degrees, of the triangle? Round answers to the nearest hundredth if needed.

math
Constant. No matter what year, the number of months in May will always stay the same, or constant. An example of a variable could be how many Sundays in May, because there's not always the same amount! Hope that helps! ~Denise

Math
100ml bottle of 500mg/5ml

Math
A child's. Dose for cefadroxil is 30mg/kg body weight once a day for 14 days.what is the smallest bottle that will provide. Enough medication to last 14 days. If child weighs 44 lbs.

Math
Katherine earned 84,92,84,74, and 70 on her first five test. What is the minimum grade Katherine needs to earn on the next test to have a mean of 84 ?

Math
(33 +19)2(33+19-1)

Math
(2)(33)(19)[2(33)(19)-33-19]

Math
A 12-ft. board is cut into 2 pieces so that one piece is 4 feet longer than 3 times the shorter piece. If the shorter piece is x feet long, find the lengths of both pieces.

Math
A 12-ft. board is cut into 2 pieces so that one piece is 4 feet longer than 3 times the shorter piece. If the shorter piece is x feet long, find the lengths of both pieces 12ft-x=3x+4 12ft- x-3x=4ft 12ft-4x =4ft -4x=-8ft x=2ft

Statistic
If p=.0059538866 critical value is 3.72 is p greater than cv

Chemistry
On Mars, the gravitational acceleration (g) is equal to 3.7 m/s2. Imagine the experiment from our lab performed on Mars, using a distance of 68 m from the catapult to the bucket. What velocity would you need to launch the ball into the bucket?

Statistic help
What do I do in correlation question. Indications of where the relationship is linear showing cv?

Statistic II
Correlation problem Y=ax+b A=1.059398484 B=27.23752342 R2=.2552814508 R=.5052538478 Cv=.4438 chart 20-2=18 row table 0.05 Not linear 25.5% Mean=435 This is my answer from information up top

statistics please help!
If 3 cards are drawn with replacement from a shuffled deck, what is the probability that at least one of them will be a heart

statistics please help!
If 3 cards are drawn with replacement from a shuffled deck, what is the probability that none of the 3 will be hearts?

statistics please help!
If 3 cards are drawn with replacement from a shuffled deck, what is the probability that all 3 will be hearts?

Statistics
A school experiments with two teaching approaches for mathematics. In one classroom the material is taught using lectures only. In the other classroom lectures are mixed in with the use of manipulatives, computers, and collaborative activities. Do the data below support the ...

Statistics
A school experiments with two teaching approaches for mathematics. In one classroom the material is taught using lectures only. In the other classroom lectures are mixed in with the use of manipulatives, computers, and collaborative activities. Do the data below support the ...

Statistic
Use a Confidence Interval to Solve Each Problem 1-3 1. Graduates of a two year associate degree nursing program (AND) and graduates of a four year baccalaureate nursing program (BSN) both take the same certificate exam for licensure as a registered nurse. It has been argued ...

Statistic
Graduates of a two year associate degree nursing program (AND) and graduates of a four year baccalaureate nursing program (BSN) both take the same certificate exam for licensure as a registered nurse. It has been argued that the two year program is too short, and that ...

Physical science
What is the current produced by a 9volt battery flowing through a resistance of 2*10 ohms

Science
Which direction will a positive charge move if it is placed in the electric field surrounding a proton? Which direction will a positive charge move if it is placed in the electric field surrounding an electron?

force
A 10-kg box is pulled along a horizontal surface by a force of 40N applied at a 30° angle above horizontal. The coefficient of kinetic friction is 0.3. Calculate the acceleration

physics
a 450 cm^3 of aluminum (D = 2.7 g/cm^3) is lowered carefully into a completely full beaker of water? what is the weight of the water, in newtons, that spills out of the beaker?

math
if the wall is 8 2/5 high and 18 1/3 long how do I calculate how much square foot is painted blue if 1/2 is painted?

math 2
a bag contains 8 blue marbles 6 red marbles and 4 green marbles .What is the probability of selecting a blue marble, replacing it in the bag and then selecting a red marble ?

Frequency Distribution
I figured it out!!! Thanks. It's 7.

Frequency Distribution
Number of sales during hour 6 7 8 9 10 Number of occurrences 25 20 10 0 5

Frequency Distribution
The manager of a retail store counted the number of sales each hour during a 60-hour week. The frequency distribution is given below . Find the average number of sales during an hour Number of sales during hour Number of occurrences 6 25 7 20 8 10 9 0 10 5

Bayes' Theorem
Help!!! I'm not really good at Bayes' Theorem. Can you please walk me through. In the current second year class of a top ranked US university, all students come from three states in the US . Kansas, Illinois, and Ohio supply respectively 40%, 50%, and 10% of the ...

Precalculus
The arc corresponding to a central angle of 35 degrees in a circle of radians 10 feet measures _____ feet. Round your answer to two decimal places.

Precalculus
I have no idea to even know how to start it.

Precalculus
The legs of a right triangle measure 5 inches and 7 inches. If theta is the angle between the 5-inch leg and the hypotenuse, sin theta=_____. A. .71 B. .81 C. .07 D. .58

Precalculus
Dr. Black is standing 20 feet from a streetlamp. The lamp is making his shadow 5 feet long. He estimates that the angle of elevation from the tip of his shadow to the top of the streetlamp is 30 degrees. To the nearest foot, the streetlamp is about _____.

Precalculus
A 60-foot tree casts a shadow 85 feet long. The sine of the angle of elevation of the top of the tree to the sun is approximately ___. A. .82 B. .75 C. .58 D. .33

geometry
what is the area of the base of a rectangular pyramid with a length of 2.75 inches and a width of 2.75 inches? Also what is the area of a face (lateral) with a length of 2.75 inches and a width of 2.75 inches?

Math
When the price of paper increases from $250 to $257 per ton, the quantity supplied increases from 350 to 390 tons per day. The price elasticity of supply is:

math
how do I calculate how much square foot is blue if 1/2 is painted

algebra
how to convert to standard form by completing the square on x and y. 9x^2+4y^2-72x+16y+124=0

trig
Karen earns 43 dollars per week working pt at a bookstore. she makes one dollar more for each book she sells. the amt A, in dollars that Karen earns in a week ifshe sells b books is given in the function A(b) =43 + b how much does she earnin a week if she sells 22 books?

chemistry
How many moles of solute are in the following solutions? Part A 250mL of 0.26M acetic acid, CH3CO2H 2.90L of 0.31M NaOH 980mL of 3.5M nitric acid, HNO3

phoenix
Select the approximate values of x that are solutions to f(x) = 0, where f(x) =- 8x2+5x+3. I don't know if i did it correctly but my answer is (1.00,-0.38

Business Management
What kinds of queries would be useful to Woodcraft, assuming that it wants to improve its sales, relationship with its customers, or other aspects of its business? Describe what information you might want to select from the database in the form of a query, and list the ...

Math
The breaking strength (in pounds) of a certain new synthetic is normally distributed, with a mean of 125 and a variance of 25. The material is considered defective if the breaking strength is less than 113.5 pounds. What is the probability that a single, randomly selected ...

English
The in-text citation go in the reference

English
Ms. Sue can you tell me which one right. I am confuse. Ms. Writeacher-March 2003. "Education globalization and international action".(Braslavsky) Prospect, 13. Retrieved February 16,2007 Mr. Reed-(Braslavsky, March, 2003)

English
I just want to know if i have these correct for in-text citation. January 2005. Globalization: “A portrait of exploitation, inequality, and limits” (Dunklin) Prospect, 27. Retrieved January 15, 2008 September 1977. “Body Politics: Power, Sex” (Nancy) Non-...

English
Ms. Sue can you tell me which one right. I am confuse Ms. Writeacher-March 2003. "Education globalization and international action".(Braslavsky) Prospect, 13. Retrieved February 16,2007 Mr. Reed-(Braslavsky, March, 2003)

English
Confuse- Ms. Writeacher say it suppose to look like this? March 2003. "Education globalization and international action".(Braslavsky) Prospect, 13. Retrieved February 16,2007 Mr. Reed-(Braslavsky, March, 2003)

English
Thank you so much. Ms.Writacher

English
Is it suppose to look like this? March 2003. "Education globalization and international action".(Braslavsky) Prospect, 13. Retrieved February 16,2007

English
Can you please explain what is in-text citation for this-- Braslavsky, C. (March 2003). Education, globalization and international action. Prospects, 1-3. Retrieved February 16, 2007,

Math
Could someone help with this problem, I have tried numerous of times to solve it. Thank you. Achieve $225,500 at 8.55% compounded continuously for 8 years, 125 days.

Statistics
Pop. Mean =87 Standard deviation=8 Sample size=64

American Government
The GOP broke new ground with the selection of which of the following as the chair of the republican national committee?

Anthropology
Agricultural, describing how the group will allocate land & labor.

Math
In a survey of a TriDelt chapter with 50 members, 21 were taking mathematics, 32 were taking English, and 7 were taking both. How many were not taking either of these subjects?

Phyiscs
An autographed baseball rolls off a 0.5m high desk and strikes the floor 0.4m away . How fast was the ball traveling when it hit ?

statistics
candidate #2 received 32% of the votes and candiate #3 received 14% of the votes, WITH a 6 % margin of error. what does this information tell us about the popularity of the candidates? 5

mmale, how many are females?ath
there are 89 students out of 100. 7 out of 8 are

early childhhod
what assists in both bone and blood formation by aiding in the absorption of both calcium and iron?

pre algebra
a total of 400 tickets were sold for the school play, they were either adult tickets or student tickets. there were 50 fewer student tickets sold than adult tickets. how many adult tickets were sold

Physics
A force of 12.7 N pulls horizontally on a 1.4-kg block that slides on a rough, horizontal surface. This block is connected by a horizontal string to a second block of mass m2 = 2.32 kg on the same surface. The coefficient of kinetic friction is µk = 0.22 for both blocks...

Math
john, who is 42 years old, has a nephew age 9. In how many years will the age of his nephew be one fourth john's age?

social studies
Governments must provide some goods and services because: A. Producers cannot limit who uses them B. Only some people wish to use them C. Private companies are unable to make them D. Consumers distrust private suppliers of them I am thinking "C"

business
If you deposit $5000 in a savings account at 5.8% interest per year, how much will you have in 36 years? (Answer to the nearest dollar)

Business
What is cultural diversity? Why do managers need cultural diversity? Is cultural diversity present in your organization (work, school, church, etc.)? How?

Science
Is air a good radiator, insulator, conductor or convector of heat? If three metal spoons are on a table and each at room temperature, what will happen if they touch?

science
Which of the following causes a hot air balloon to rise? Resistance Conduction Convection Radiation

Math
If the stem-and-leaf plot shows kilometers walked by participants in a charity benefit walk. How do I determine how many people participated in the walk and how many of the walkers traveled more than 14 kilometers? I don't want the answer. I just want to know how to work ...

Math
Thank you Steve. I understand now.

Math
KILOWATT-HOURS OF ELECTRICITY USED MONTH KWH USED/ MONTH DWH USED JAN 2,640 JUL 960 FEB 2,190 AUG 1,380 MAR 1,500 SEP 1,110 APR 1,620 OCT 840 MAY 1,440 NOV 1,260 JUN 1,080 DEC 1,820 A. Describe how to find the range of the data set. B. Find the range.

Math
how many pieces of wood measuring 12-inch by 13-inch can be cut from 48-inch by 72-inch piece of wood

7th grade math
7 3x7=21 So, if Larue scored 10 points less than 3 times the number of points that Ross scored, Ross would have scored 7.

Math
Carter got the following scores on Science tests: 78,82,88,90,93. What is the mean deviation?

African History
what is the controversy concerning the racial identity of the ancient Egyptians. What is the significance of this controversy for the history of African Americans? .

gcu
Show that 9300 cal is required to change 15 g of 20° C water to 100° C steam.

phyhics
Show that 480 W of power is expended by a weightlifter when lifting a 60-kg barbell a vertical distance of 1.2 m in a time interval of 1.5 s.

phycis
59. A simple lever is used to lift a heavy load. When a 60-N force pushes one end of the lever down 1.2 m, the load rises 0.2 m. Show that the weight of the load is 360 N.

Government
recent trends in political participation show that people are

fitness
the answer is B, im doing the same test and found the answer in my book just now :)

Coding
Anesthesia services for closed treatment of fracture of humerus; patient is 85 years old, but healthy.

Statistics
If a couple has 4 children and none are from multiple births or twins. With the probability of sons being 50% how many sons would they expect to have?

math ratio
The ratio of parents to students of 4:5. If there are 189 total spectators to the game,how many of them are parents. How many of them are students.

math
y=a-x solve for x

history 11th grade
What are some of the perils of the Amazon Rain Forest

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