1. Chemistry
How is Surface catalyst(heterogeneous) and homogeneous catalyst different? I'm in 10th grade chemistry and I don't understand it.
Please help me with these factorise algebra questions!!! 1. 9c squared + 30c + 25 - 4d squared 2. 12 + 89 - 4a squared 3. -5x squared + 27x - 10 4. If A= 15x squared - 20x +11 and B= 1 + 9x+ 5x squared, then A-B when factorised is...
3. 5th math
what is the least common multiple (LCM)for 15 and 45? There are 16 girls in a class of 36 student. which expression could be used to determine the number of boys (b) in the class? please! help i think this too hard for 5th grade math. this suppose to be for 10th or college ...
a 5.0 kg bowling ball is rolling down the lane at 4.0 m/s. what is the kinetic energy of the bowling ball?
log (x-9) - 109x=log 19
as you are driving your car on the freeway, your tires are rotating at a rate of 920 revolutions per minute. The diameter of each tire is 24 inches. What is the total feet traveled per minute?
Lack of iron in the photic zone of the open ocean restricts the size of plankton populations. Iron is what kind of factor for marine plankton?
Lack of iron in the photic zone of the open ocean restricts the size of plankton populations. Iron is what kind of factor for marine plankton?
a tree casts a shadow that is 20 feet long. the angle of elevation from the end of the shadow to the top of the tree is 66 degrees. Determine the height of the tree to the nearest foot.
Lack of iron in the photic zone of the open ocean restricts the size of plankton populations. Iron is what kind of factor for marine plankton?
Which planet has the gravitational force that is closest to Earth's gravitational force?
scientist needs 5L of 12% solution. She has on 10% and 17% solution. How much of each does
At a preview of a movie,6 people out of 500 walk out. suppose that 600,000 people see the movie. estimate the number of people who walk out
Find a pattern fot this sequence. Usde the pattern to show the next two terms. 1,2,6,24,120,___,___?
mary has a bag which contains 5 green marbles, 7 red marbles, and 9 blue marbles. without looking what is the probability of her pulling a red or a green marble
Number of pages of a 5 page articile left to read if you read p pages.
17. algebra
In 1992, the life expectancy of males in a certain country was 61.6 years. In 1995, it was 65.2 years. Let E represent the life expectancy in year t and let t represent the number of years since 1990. The linear function E(t) that fits the data is... E(t)=_____t + _______ (...
18. Algebra
In 1992, the life expectancy of males in a certain country was 68.3 years. In 1998, it was 71.1 years. Let E represent the life expectancy in year t and let t represent the number of years since 1992. The linear function E(t) that fits the data is... E(t)=_____t + _______ (...
I have to write an insightful handwritten reflective response via essay about a passage in a novel. The passage is about 3 sentences. It is a summer reading book. How many pargraphs do i need and help with layout of essay.
Using a dictionary look up and then list four definitions of the word nice that you would use in a paragraph to develop this topic sentence: "The word nice is surprisingly ambiguous."
A radio station's signal has a radius of 100 miles. If you drive at a constant speed of 40 miles an hour, nonstop, directly across the diameter of the signal, how long can you listen to the station before the signal fades?
The difference between two numbers is 25. The smaller number is 1/6th of the larger number. What is the value of the smaller number?
hi can you help me with this problem please, thank you.----------------- If the speed of an experimental car is decreased by 8km/h it completes a 140 km trip in 2 hours more than had it been traveling at its usual speed. Determine its usual speed.
hi can you help me with this problem please, thank you.----------------- If the speed of an experimental car is decreased by 8km/h it completes a 140 km trip in 2 hours more than had it been traveling at its usual speed. Determine its usual speed.
hi can you help me with this problem please, thank you.----------------- If the speed of an experimental car is decreased by 8km/h it completes a 140 km trip in 2 hours more than had it been traveling at its usual speed. Determine its usual speed.
what happens when a population or group of living things is divided into two separate groups in two separate environments ?
The slope intercept is 1/3 and the y intercept is 4xsquaredk. What is the slope intercept form.
five marbles in a jar are green. the odds against choosing a green marble are "4:1" how many marbles are in the jar
I have to right an iambic pentameter poem on a pilgrim such as a plumber or a goat farmer. I've been working on it for days but just came to the assumption that I CAN'T RIGHT POEMS. I've tried using quotes from Dantes inferno and rewording them but it didn't really help since ...
Stories can mean different things to different readers. State a meaning you find in “The Pedestrian,” and then discuss how the story’s setting is relevant to that meaning. This is my question, I am confused as to what they mean by meaning. Could someone explain?
Write an essay comparing Baldwin's account of the Titanic with Rosenthal's account of his visit to Auschwitz.In your paragraph, explain how the tone and purpose of each essay is different. Support your argument with at least one example from each essay.
what is the mathematical relationship between the total charge in the nuclei and the total charge of the nuclei in the products.
The sum of three numbers is 301. The second number is 3 less than twelve times the first number. The third number is 4 more than seven times the first number.
why do religions that have common geographic origins tend to share common code of behavior and views of the nature and reason for existence?
I'm writing an essay for English class. I was just wondering if somebody could read over this sentence and tell me whether or not it sounds alright. Everybody wants to be happy, but we often forget how easy it can be to attain hold of that happiness due to tragedies in our lives.
two cars are driving toward each other from opposite directions if one is driving 55mph the other is driving 60 mph and the cars are 500miles apart how long before they pass each other? round to the nearest tenth of an hour.
37. 10th grade algebra not ms.sue
a 68 mile trip uses 2 gallons of gas. how many gallons would you use on a 110 mile trip? round to the nearest tenth of a gallon.
mary takes 3 hours to mow the yard. it takes sally 5 hours. how long would it take with them mowing it together? give the exact decimal answer.
two cars are driving toward each other from opposite directions if one is driving 55mph the other is driving 60mph and the cars are 500 miles apart how long will it be before they pass each other? round to the nearest tenth of an hour.
suppose the bases of the rectangle and triangle in the building above are doubled to 40ft,but the height of each figure remains the same.How is the force of the wind against the side of the building affected?
What congressmen had sons who fought in the Vietnam War? What were the names of the Congressmen & sons? There were 28 total, 19 who saw combat. I found that info on one web site. I looked through many other sites, and can not find their names.
Where can I find a complete description about North American racial ideologies from 1500 to 1830 and their effects on Latin American Racial ideologies? Does this mean the transition from slavery to freedom?
Please help me. I just finished the Road by Cormac McCarthy and I really need help. I am so confised by this book, and I have to find the Plot, Setting and how it affects the story, Characters and how they differ, Literary devices used in this book, and quotes from the text to...
A specific structure in a single-celled organism.How the structure is involved in the survival of the organism?
Im 16 years old im not actually really doing well in school. I cut way too many classes till this point have 5 overall credits. My guidance consuler told me that i have to take another year and this upcoming summer school i can't go cause i have way to many cuts. I really want...
Im 16 years old im not actually really doing well in school. I cut way too many classes till this point have 5 overall credits. My guidance consuler told me that i have to take another year and this upcoming summer school i can't go cause i have way to many cuts. I really want...
you find an unusual organism growing on the bark of a dying tree . Under a microscope , you observe the cells are eukaryotic , have cell walls , and do not contain chloroplasts . Into what kingdom . Would you place this organism ? Explain your decisions ?
what was one reason that some italian cities developed into major commerical and cultural centers during 13th and 14th centuries? 1.- UNIFIED CENTRAL GOVERNMEMT 2.-ISOLATION ECONOMIC POLICES 3.-GEOGRAPHIC LOCATION 4.-SYSTEM OF SOCIAL EQUALITY
1.the flame of the candle or other burning matter always towards upward direction.why? 2.when the photos is taking by looking to the camera and later when the photo printed, why the photo always seems to look at the direction wherever we move around to it?
We're doing a lab report on the hardness of water, and one of the calculations is "The EDTA reacts with the hard water ions in a 1:1 mole ratio. Calculate the molarity of the ions present in 20 mL of water tested." How would you do this?
Lorenzo's model train is 1/87 the size of the original train. He measures the engine of the model train and finds that it is 2.5 inches tall. What is the height of the real engine to the nearest foot?
How do you do this proof? "In circle O, line segment ABC and line segment ADE are secants. Prove that angle ADC is congruent to angle ABE. This is the diagram: img523.imageshack.us/my.php?image=diagra​m3.jpg
What is a Specialized form of informal english used by Traesmen among themselves? A boorrowed word which has been made to resemble English has been what??? Threee Major North American Dialects are what??
Which bond type is soluble in alcohol? Metallic, ionic, polar covalent, or nonpolar covalent bonds? Which bond type has hard, brittle crystals? (I think the second is ionic, but not positive.)
In logarithms, my problem is 2log(subscript 3)n + log (sub 3)5. I know how to add logarithms together, but what do I do with the 2 before the first log?
How many water molecules are in a 1.oo-L bottle of water? The density of water is 1.00 g/mL
Explain the second Industrial Revolution. identify and explain each of the five condititions which allowed the second industrial revolution to take place in america.
58. Instrumental
Can I get some advice on guitars? I'm a 10th grade student looking to purchase a guitar and self-teach. Would you suggest starting off with acoustic rather than electric? Is there a particular guitar you would recommend to a beginner? What about costs? thanks
59. math
Can u please help me with this..this is my sons 6th grade work and im pulling my hair out..i would like to know how to do it so he does not think or his teacher that im an idiot... Thank You So Much -The mystery # is a decimal.. -The digit in the 1's place is less then then ...
The common difference of an arithmetic sequence is 4. The 13th term is 103. Find the general term of the arithmetic sequence.
engineering foundations 2 calculations and converstions question. How do I round off the following numbers to three significant figures? Or can you give me an example of how to round off number 1. 4.65735 m 2. 55.578 s 3. 4555N 4. 2768 kg
in this geometry sequence, i have a 90 degree angle, 135 degree,157.5 degree & i need to know the next angle. please help!
63. 10th math
The sum of the 4th and 8th terms of an AP is 24 and the sum of the 6th and 10th terms is 44. Find the first three terms of AP
64. DrBob222
Im in the 10th grade in Chemistry 1 Honors. Im learning to write a chemical equation. Im confuse on that statement i was given for my homework. The products and reactants are just magnesium Sulfide and magnesium and sulfur? Then why are they talking about yellow crystalline ...
Identify three peace efforts of the late 1800s and rarly 1900s. (1)hoped for a permant end to the scourge of war. (2)a world court to settle dispute betwwen nations. (3)the struggle for women suffrage . tell me is this is right.
66. Math
On Wednesday you drove from home to work at 60 mph and got there in 23 minutes.  On Thursday you drove at 69 mph.  Round answers to nearest 10th.  Use:  R 1 T 1 = R 2 T 2   (double click this to see clearer) Round answer to the nearest 10th and use Unit Abbreviations for ...
67. Math
On Wednesday you drove from home to work at 50 mph and got there in 43 minutes.  On Thursday you drove at 68 mph.  Round answers to nearest 10th.  Use:  R 1 T 1 = R 2 T 2   (double click this to see clearer) Round to the nearest 10th and Use Unit Abbreviations for Units. ...
68. Math Word Problem
Riding on a school bus are 20 students in ninth grade, 10 students in tenth grade, 9 students in eleventh grade, and 7 students in twelfth grade. Approximately what percent of students on the bus are in ninth grade? How do I go about solving this?
69. statistics
10th grade New York public school students taking a standardized English test produced test scores that were normally distributed with a mean of 85 and a standard deviation of 4. Let x be a random variable that represents the test score of a student. Students whose test scores...
A history class is comprised of 6 female and 9 male students. If the instructor of the class randomly chooses 5 students from the class for an oral exam, what is the probability that 2 female students and 3 male students will be selected? Round your answer to 3 decimal places...
71. Samples and Predictions Math
Help please I really don't understand this! 1)Janine wishes to conduct a poll to predict how many students will vote for her for class president. Which polling methods are likely to be biased? Choose all answers that are correct. A. Five people in each of Janine’s classes ...
Choose the answer that shows a correct revision to the following sentence: Why if you did not want to hear it did you ask me what I thought a) Why, if you did not want to hear it, did you ask me what I thought? b) Why, if you did not want to hear it did you ask me what I ...
73. medical Terminology
At a certain marathon race, the winner comes in at a time of 130 minutes. Second place comes in at a time of 135 minutes, and third place comes in at 140 minutes. Starting with third place, contestants come in at regular intervals all the way up to the last successful finisher...
At a certain marathon race, the winner comes in at a time of 130 minutes. Second place comes in at a time of 135 minutes, and third place comes in at 140 minutes. Starting with third place, contestants come in at regular intervals all the way up to the last successful finisher...
76. algebra
An “A” is considered 4.0, a “B” is 3.0, a “C” is 2.0, a “D” is 1.0, and an “F” is 0. In your first semester you received the following grades. Calculate your grade point average English = credits 3.0 Grade = C Biology = credits 4.0 Grade = B Communications...
77. English
Posted by rfvv on Monday, July 13, 2015 at 9:33am. Lesson Plan .... Standards Addressed: General Goal9s): Specific Objectives: ...... ===================== In a leson plan, what is 'Standards Addressed'?•English - Writeacher, Monday, July 13, 2015 at 9:42am Standards are ...
78. math
I have a question I would really appreciate the answer. If 15% of my grade is 74% and 96 is 15% of my grade and 40% of my grade is a 60.5% without the final counting for 30% what is my grade? Please help thank you.
79. Maths
John wants to calculate the sum of a geometric series with 10 terms, where the 10th term is 5 859 37... ... series with 10 terms, where the 10th term is 5 859 375 and the common ration is 5/3. John solved the problem by considering another ... show more ... Using John's method...
"I'd done a car for one of her patients, who told her about me." Which of the following describes the part, "who told her about me." A. nominal clause B. adjectival clause C. infinitive D. gerund phrase Is the answer, B, the adjectival clause describing what patients?
"Well that's sculpture, making a '74 Toyota look like a '63 Corvette, only I didn't think of it that way...I was doing good work, and I was making good money." What is the purpose of the ellipsis (...)? I have it down to two possible answers: A. to prepare the reader for a ...
"On windy days, you can hear its wings beating like a pair of brass cymbals." The part, "beating like a pair of brass cymbals" constitutes which of these? A. nominal clause B. adjectival clause C. gerund phrase D. participial phrase I chose D. participial phrase
Which of the following correctly describes this sentence? It looms menacingly over the road from the roof of a farmhouse, a flying reptile with a seven-foot wingspan. A. Simple B. Complex C. compound D. compound-complex I felt it was a simple sentence.
This is confusing to me: "Truth, Sekhar reflected, is like the sun. I suppose no human being can ever look it straight in the face without blinking or being dazed. He realized that, morning till night, the essence of human relationships consisted in tempering truth so that it ...
85. MATH
there are 400 students at smith Elementary school 1/4 of the students are in fourth and fifth grade, 1/10 of the students are in grade 3, 2/8 are in second grade and 2/5 are in first grade . How many kids are in each grade? (4th and 5th have an equal amount)
86. physics
a woman weighs Fg=650 when standing on a stationary scale. The woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 9 m/s to 1 m/s in a time interval of 1 second. What is the average ...
87. Physics
WOMAN IN ELEVATOR A woman weighs Fg= 650 N when standing on a stationary scale. Now, the woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 8 m/s to 1 m/s in a time interval of 1 s. ...
88. Physics
A woman weighs Fg= 600 N when standing on a stationary scale. Now, the woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 7 m/s to 1 m/s in a time interval of 1 s. What is the average ...
What is one role fats play in keeping your body healthy? A. maintaining healthy skin and nails B. aiding muscle growth C. removing waste D.lubricating joints I believe it's C, but I'm not quite sure. I'm a cyber school student and I can't seem to find the answer in my online ...
90. grammar / english (10th grade)
Two sentences: 1) The race among the three relay teams was close; none of the three; however, is giving up hope of winning. 2) The race among the three relay teams was close; however, none of the three is giving up hope of winning. Which is the correct one grammatically? ...
91. Survey Math
A survey of 240 10th grade students in a local High School found that there were 140 girls and 100 boys in the grade. Of the 140 girls, 100 preferred gym class while 40 preferred art class. Of the 100 boys, 40 preferred gym class while 60 preferred art class. Construct a data ...
92. Stats/math
The deciles of any distribution are the 10th, 20th,...90th percentiles. The first and last deciles are the 10th and 90th percentiles, respectively. What are the first and last deciles of the standard Normal distribution? HOw would i solve this? thank you sooo much!
93. statistics
The grades on the final examination given in a large organic chemistry class are normally distributed with a mean of 72 and a standard deviation of 8. The instructor of this class wants to assign an “A” grade to the top 10% of the scores, a “B” grade to the next 10% of...