Sunday
April 20, 2014

Posts by MAry


Total # Posts: 3,172

Derivative
with respect to x f(cos x) if f'(x)= 1/x find (f(cos x))' i got tan x sec x this is wrong. please explain. thank you

Chemistry
A scuba diver takes a 2.3 balloon from the surface, where the pressure is 1.1 and the temperature is 28, to a depth of 35 , where the pressure is 4.5 and the temperature is 14.

Chemistry
Thanak you so much for your help, DrBob222

Chemistry
Oh, sorry. I meant to say that solution y has a 10 times higher OH- concentration compared to solution x. I hope it makes sense now. :-) Mary

Chemistry
Solution x has a pH of 4.35. Solution y has 10- times high [OH-] compared to solution x. Solution z has a pH 4.0 units higher than that of solution x. calculate the ration of [H3O+] between solutions x&y and between x&z. What is the pH of solutions y and z? classify each solut...

Math
Find the HCF 1) 7x and 9 : nothing 2) x^2(x-4) and x(x-4) : its (x-4)? 3) 6b and 2b^3 : 2b ,? 4) 6(x-1)^2 and 16(x-7)(x-1) : x-1 , 5) 18y,27y, 9xy^2 : 9y 6) 5a^2 and 25a : 5a 7) 6abc, 8ab, 12bc : 2b 8) 9a^2b and 18ab^2 : 9ab

English
The team ______ won the game is my favorite. which word correctly completes the sentence above? a. which b.whom c. who d. that

science
in the digestive tract, mouth is bolus to a. stomach is to chyme b. gallbladder is to insulin c. small intestine is to carbohydrate d. esophagus is to peristalsis

....
hans uses a wheelchair. although he has a ramp to get in his house he finds it difficult to get his wheelchair up the ramp. which modification would make it easier for hans to get in his house? a. increase the length of the ram b. increase friction between the wheels and the r...

....
in the digestive tract, mouth is to bolus as a. stomach is to chyme b. gallbladder is to insulin c. small intestine is t carbohydrates d. esophagus is to peristalsis

English
hans uses a wheelchair. although he has a ramp to get in his house, he finds it difficult to get his wheelchair chair up the ramp. which modification would make it easier for hans to get in his house? a. increase the length of the ramp b. increase the friction between the whee...

HSC/514
I have to choose a healthcare organization and discuss the accountability, internal and external factors I know how to do the assignment. I need to know how to find the names that would have the information available online. what would I google for?

English
The students felt fairly prepared for whatever tests their instructors might give them, after years of studying , however difficult the test might be which group of words is misplaced in the sentence above? a. however difficult they might be b. the students felt fairly prepare...

science
water freezes in the crack in this boulder and expands. over time, pieces of the boulder will break off. what type of weathering effectis this an example of? a. wedging b. hydration c. carbonation d.reduce pressure

science
two waves are traveling through the a container ofnitrogen . the amplitude of the first wave is .3 cm and the amplitude of the second wave is .9 cm. what is true about the two waves? a. the energy of the first wave is less than the second wave. b. the energy of the first wave ...

Statistics
0.833 grams per mm

Statistics
0.833 inches per gram

early childhood
which of the following is best suited to a formative assessment of progress 1. muscular strength snd endurance 2. body fat analysis 3. flexibility 4. qwareness of self and space

Social Studies
What would be abolished if the limits of the Constitution did not restrict officials?

algebra
correction ..... 1/R=1/R1+1/R2+1/R3

algebra
express R as rational expression 1/R=1/R2+1/R2+1/R3 R FOR R1=5 OHMS R FOR R2=4 OHMS R FOR R3=10 OHMS

..
if you already had the chiken pox you can be arournd a person with the disease without no fear of becoming sick. what feature of the immune system explains this? a. acquired immunity b. cell- mediated immunity c. humoral immunity d. primary immune system

science
which structure is common to both prokaryotic and eukaryotic cells ? a. mitochondria b. cell membrane c. endoplasmic reticulum d. pladtids

math
a satisfaction survey is administered to 568 people. seventy- one people were unsatisfied with the product. which statement is true? a. 1 out of every 8 clients was unsatisfied b. 6 out of 8 clients were satisfied c. 1/4 pf the clients were unsatisfied d. 2/3 of the clients we...

math
which number solves the equation for x 1/3:x=1:3 a. 1/9 b. 1 c. 3 d. 9

math
which would be the approximate metric equivalent to 7 inches? a) 0.63 mm b) 1.4 m c) 12 dm d) 18 cm

math
a new physician saw 841 clients during the first year of her practice and 1,072 the second. which represents the percentage increase in client volume? a. 22% b. 27% c. 78% d. 127%

math
six hundred and thirty miligrams is equal to how many grams? a) 0.063 g b) 0.63 g c)63 g d) 630,000 g

math
a pudding recipe for 50 people calls for 4 cups of sugar. each bag of sugar contains 6 cups. how many bags of sugar will be needed to make this recipe for 300 people? a. 4 bags b. 13 bags c. 24 bags d. 50 bags

English
I need help

English
p w s a f m l x copy the letter string above on a piece of paper. cross out the second and last letters. replace all vowels with the letter C. Insert an O before the second C. cross out the first and third letters. Double the second letter. which letter sequence remains on you...

math
collecting cans and bottles for recycling. the ratio is 8 cans to 9 bottles. If you collected 240 cans how many items did you collect in all. Explain to me how you get the answer, please!

science
the team____ won the game is my favorite a. which b. whom c.who d. that

science
which rna basr sequence wod produce the amino acid sequence : Valine Proline Alinine a.GCGCGUUG B. GUGCCUGCG C. GUUCCCACU D. GCUCUUGCU

science
which rna base sequence would produce the animo acid sequence: Valine ALanine

....
p w s a f m i x copy the letters above on a piece of paper. cross out the second and last letters. replace all vowels with letters. double the second letter which letter sequence remains on your page? a. ssfmoi b.cffmmc c.sffmoc d.fscfmc

algebra
i am to consider the line -x-3y=2 what is the parallel line slope and the perpendicular line slope

Critical Points
find values for a, b, and c so that the function f(x) = x^3 + ax^2 + bx+ c has a critical point at (1,5) and an inflection point at (2,3). I got a as -6, but I don't know what b and c are. For b and c I just have b + c= 10. I do not know how to proceed thanks

Minimum on a Closed Interval
What is the minimum value of the function g(x)= 1/x * sin (pi *x) on the interval [1,2]? I got -2/3. Is this right? thanks.

Absolute Extrema
Thank you both! I appreciate it. :)

Absolute Extrema
Find the minimum and maximum values of the function f(x)= 2/3 sin pix on the interval [1,2] (domain). I got (1.5, -2/3) as the minimum and no maximum on the interval. Is it correct? Thank you.

English
Oops I meant nor for number 8. Sorry! :/ It goes 'either, or' and 'neither, nor'.

English
4) I think instead of nor use neither. 8) I would personally phrase it as: Neither my brother or I can go swimming. I'm just basing these corrections off of how I would speak it (native speaker). Hope this helps. :)

math
L can represent Lori and M for Maria. L + M = 10 L= M + 4 M + 4 + M = 10 2M + 4= 10 2M= 6 M= 3 L= 7

English
3) Just make sure that the noun closest to the blank matches the verb form! So here it should be plural since the noun right before the blank is 'Kirk', one person. (remembers) 5) It would be 'is'. Beef and broccoli is the name of the dish. It is easy to get co...

Derivative
given that f, g, and h are differentiable functions f(g(h(x))) = x what is h'(x) in terms of f, g, f', g', and h'? I plugged in equations on my own like h(x)= x^4 g(x) = 4th root of x f(x)= x^2 i need more assistance on how to proceed thnx

science
yes form of carbon

social studies
amendments in bill of rights, freedom of speech, press, liberty, and pursuit of happiness, etc.

math
minimum area for square is either 9*9= 81 or 15*15=225. 81 is less so 81 sq. inches each tile has a side length of 9 inches and you'd have a box of nine rows and nine columns of tiles like this __ |__| so each end has nine tiles * 9 inches per tile, so that's 81 inches...

Math
let's use l and w for the variables l= 2w + 1 lw= 66 yds. ^2 (2w + 1) w= 66 2w^2 + w= 66 2w^2 + w -66 = 0 (2w -11 ) (w + 6 ) = 0 2w= 11 or w= -6 w= 5.5 is positive so this is our answer!!! and the length = 2w+1 so simply plug in! l= 2*(5.5)+ 1 l= 12

math
you need 2 formulas to do this volumeof cylinder: pi*r^2*h volume of sphere: 4/3 * Pi * r^3 you wanna find out the cylinder's height since you have the diameter already. plug in; if height is equal to diameter then radius is half the height, therefore solve in terms of hei...

math
You want to cancel one variable Let's cancel the x's. 8 and 3 have a LCM, which is 24 3(8x + 9y= -19)= 24x + 27y= -57 8(-3x + 7y= -24)= -24x + 56y = -192 ------------------------------------- 0 + 83y= -249 83y= -249 y= -3 Plug into the first equation to figure out what...

math help re post
two parts to this problem 1) 2x-4> 0 2) 2x-4 <8 solve each separately 1) 2x > 4 x>2 2) 2x<12 x<6 if x is greater than 2 and less than 6 write it like this: 2<x<6

Derive
Thank you SO much sir. I feel a lot better knowing that I did this right

Derive
Find the derivative of sin(2x + 3y)= 3xy + 5y-2. I have this so far 1) cos(2x+3y) * d/dx (2x+3y)= 3xy' + 3y + 5y' 2) cos (2x+3y) * [2 + 3y']= 3xy' + 3y + 5y' 3) 3y' cos (2x+3y) + 2cos(2x+3y)= 3xy' + 3y + 5y' 4) 3xy' + 5y' - (3y(cos(3x+3y...

chemistry
it is similar to percent increase/decrease formulas. initial amount= 7.26 grams final amount= 8.61 grams percent increase= |8.61-7.26|/ 7.26

math
Calculate first how many pretzels are baked in an hour to make it easier. eight trays of twelve pretzels in them each= 8 * 12= 96 pretzels/hour 96 pretzels/ hour * 8 hours/ day= 768 pretzels/ day

math
Please don't triple post the same question!

math
range= absolute value of highest-lowest values highest= 2.6 degrees lowest= -2.8 degrees range= |2.6- (-2.8)| range= |2.6 + 2.8| range= |5.4| range= 5.4 degrees celsius

Calculus Derivative
I'm still not quite sure how that works out, if you can explain it please? Isn't the derivative of v dv/dt and the derivative of m (since it's a constant) 0?

Calculus Derivative
Can you please explain how you derived the first half of the second line before the '-mv * (...)'? Thank you.

Calculus Derivative
I'm trying to calculate the derivative of this: P= mv/ sqrt(1-v^2/c^2)where m and c are constants, and v depends on t. I know about the chain and product rules but I'm not even sure where to start. :/ Thank you for your help.

Geography
Houston!

....
what is the southernmost city listed on the map a. Richmond b.San Jose c.Detroit d.Houston

Calculus Optimization Problem
Thank you! I solved it out, and I got x=5 and y= 10 with a product of 500. Is this correct

Calculus Optimization Problem
Find two positive numbers whose sum is 15 such that the product of the first and the square of the second is maximal. I came up with this so far: x + y = 15 xy^2 is the maximum derivative of xy^2= 2xyy' + y^2 Now how do I solve this ^ after I set it to zero? I am stuck on ...

science
independent variable affects the dependent and changes the outcome of the experiment. therefore the I.V. is what you CHANGE. D is the answer (paper plastic and glass have different insulation levels so this is what the experiment is testing)

science
mara is preparing an experiment using three cups - one made of paper, one of plastic, and one of glass- as shown below. she plans pouring 50 ml of hot water from a pitcher into each of three cups and recording the temperatures in 5- minute intervals. what is the independent va...

math
which is correct restatement of 32% a. thirty two b. thirty two tenths c. thirty two hundredths d. thirty two thousandths

English
yes at end says.. which letter sequence remains on your page?

English
pwsafmix copy the letter string above on a piece of paper. cross out the second and last letters. Replace all vowels with letter C. insert an O before the second C. cross out the first and third letters. double the second letter. help!

English
______ and______ have been to class a. He, me b. He,I c.him, m d.him, I

English
The students felt fairly prepared for whatever tests their instructors might give them, after years of intense studying, however difficult the test might be. which group of words is misplacef in the sentence above? a.however difficult they might be b. the students celt fairly ...

English
marco was careful to wash his hands because he did not want to contract a disease what is the meaning of the word contract as it is used in the sentence above? a. a binding agreement between two parties b. reduce in size c. acquired involuntarily d. make a promise

math
an athlete. an run in 6 miles in 51 minutes. at this rate approximately how far could the runner go in 1.5 hours? A. 0.2 miles B. 8.5 miles C. 10.6 miles D. 12.75 miles

math
an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours

math
an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours

math
an athlete can run 6 miles in 51 minutes. at this rate, approximately how far could the runner go in 1.5 hours

Math
A number line starts with 7 and ends with 9.There are 7 marks in between. The letter A is above the 5th mark. What is the value of A as a fraction

chemistry
For a certain change, value of Delta U is -2.37 kJ. During the change, the system absorbs 650 joules. How much work did the system do? Please help! I get 3.02 but is not correct!!

math
what is the probability of drawing 5 queens from a standard deck of cards?

Finance
Your board of directors is thinking of taking out a loan of $500,000 for the corporporation. You have to pay $5,500 per month and $50,000 after 10 years. What annual Rate of Return would you hve to achieve on investments to make this a profitable venture?

FINANCE
What will $10,000,000 be in 12 years if it earns 7% and you add $5,000 at the beginning of every month?

Math
48000 people voted in the last election in the town of Southboro. If only 55% of the registered voters voted in the last election, how many people are registered to vote? I got 87,273 Nik put $264 in a savings account that pays 3% annual interest. How much will he have in his ...

Math
48000 people voted in the last election in the town of Southboro. If only 55% of the registered voters voted in the last election, how many people are registered to vote? I got 87,273 Nik put $264 in a savings account that pays 3% annual interest. How much will he have in his ...

Math
Is 3000 correct for the last one ? 136.40*22 48000 people voted in the last election in the town of Southboro. If only 55% of the registered voters voted in the last election, how many people are registered to vote? I got 87,273 Nik put $264 in a savings account that pays 3% a...

Math
I have the answers but i need to know the steps. Michelle has $60. If her friend Kristin has $300, what percent of kristins money does michelle have? I got 80% To Pass a test Kristin had to get 75% of the answers correct. If there were 84 questions on the test, how many questi...

physics
A sled rider with a combined mass of 50.0kg are at the top of a hill of a 14m above the level of ground below. The sled is given a push providing an initial kinetic energy of 1700J. What is the potential energy at the top of the hill? After the push, what is the total enetgy o...

algebra
I need the answer

algebra
Five (5) years ago, you bought a house for $171,000, with a down payment of $30,000, which meant you took out a loan for $141,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the following information: Esc...

math
Five (5) years ago, you bought a house for $171,000, with a down payment of $30,000, which meant you took out a loan for $141,000. Your interest rate was 5.75% fixed. You would like to pay more on your loan. You check your bank statement and find the following information: Esc...

Epidemiology
Age (Years) Influenza / Pneumonia Deaths (Di) 2007-2011 Population (Pi) from 2007-2011 (2009 used as mid-year) <1 year 7 53,267 1-4 years 4 207,832 5-14 years 5 468,548 15-24 years 14 447,580 25-34 years 27 440,646 35-44 years 40 325,022 45-54 years 92 305,929 55-64 years 1...

Chemistry
I need help with this lab. Write the equation for the decomposition of the hydrate, CuSO4*XH2O. Mass of crucible and hydrate: 93.000g Mass of crucible and pure salt: 91.196g I need to calculate the following: 1. mass of water in hydrate sample(g) 2. number of moles of water in...

Cognitive psychology
What was the varible for Mozart experiment?

social gerontology
what is the meaning associated with dementia

English
Thank You

English
Anyone know any quotes with adverbs in them?

math
what is 5% of $11,000.00 quarterly

History
Anyone Know? Background Information: before Brown v. Board of Education Discussion on Brown v. Board case beginnings. Thesis on Brown v. Board of Education Main Argument on Brown v. Board of Education Short term and Long term Impact on Brown v. Board of Education

Easy algebra
Mike is testing new batteries to determine if the batteries last as long as advertised. The actual life of one of the batteries was only 4 weeks, 2 days, and 13 hours even though the advertisement claimed it would last 3,000 hours. What was the difference, in HOURS, between th...

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