Saturday
December 3, 2016

Posts by Marissa

Total # Posts: 310

physics
At the moment car A is starting from rest and accelerating at 5.0 m/s2, car B passes it moving at a constant speed of 45m/s. How long will it take car A to catch up with car B?
January 17, 2013

Chemistry
1.49 M
December 7, 2012

math
There are 5 yellow cards, 4 red cards, and 1 purple card. He draws a card at random, replaces it, and draws a second card. What is the probability that both cards will be red?
November 25, 2012

SS8R - paragraph help!
I think it good.
November 5, 2012

math
I am not sure but I think it is 50,400 dollars a week. 60 minutes in one hour 24 hours in one day 7 days in week (5x60)=300 300x24= 7200 7200x7=50,400
November 5, 2012

Maths
x+2x+3x=180 add them. 6x=180 divide 180/6= 30
November 2, 2012

spanish
dark haired/skinned
October 29, 2012

Health
Gonorrhea is spread through contact with the ________. A. Anus, Penis, Mouth, Skin B. Penis, Anus, Mouth, Vagina C. Vagina, Skin, Penis, Anus D. Mouth, Penis, Vagina, Fingers I think it's B?
October 27, 2012

p.e.
a scull is to rowing as a -------- is to yachting.
October 25, 2012

Calculus
Assuming that f and g are functions differentiable at a (though we do not know their formulas). Prove that f +g is differentiable at a using the definition of the derivative.
October 15, 2012

Physics
A dog running in the +y-direction at 6.0 hears its owner call from behind, and 2.7 later it's running at the same speed in the opposite direction. Calculate the dog's change in velocity. Calculate the average acceleration
October 12, 2012

Calculus
F(x)=|x-5| evaluate the following limits lim x->5- ( f(x)-f(5))/(x-5) lim x->5+ ( f(x)-f(5))/(x-5)
October 10, 2012

physics
A wire tooth brace used by orthodontists. The top-most tooth is protruding slightly, and the tension in the wire exerts two forces at 16 º angle on this tooth in order to bring it back into alignment. If the forces have the same magnitude of 19.5 N, what is the magnitude ...
September 14, 2012

physics
A 316-kg boat is sailing 12.0° north of east at a speed of 1.60 m/s. 39.0 s later, it is sailing 36.0° north of east at a speed of 4.00 m/s. During this time, three forces act on the boat: a 31.4-N force directed 12.0° north of east (due to an auxiliary engine), a ...
September 14, 2012

Physics
Two arrows are shot vertically upward. The second arrow is shot after the first one, but while the first is still on its way up. The initial speeds are such that both arrows reach their maximum heights at the same instant, although these heights are different. Suppose that the...
August 31, 2012

Health
I believe the correct answer is C. increase;reduce?
August 30, 2012

Health
I put D down and got it wrong.
August 6, 2012

Physics
A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.9 s later. If the speed of sound is 340 m/s, how high is the cliff? i know you use the equation y=(initial velocity)(time) + (1/2)(acceleration)(time^2) but I'm having problems putting all...
July 2, 2012

Science
What happens to approximately 60% of the energy released during the complete oxidation of glucose? A) It is used to synthesize more ATP. B) It is reused to supply the energy for anabolic reactions. C) It is stored in the body as fat. D) It is lost by the body in the form of heat
June 21, 2012

science
In a micelle, why do you find the fatty acid chains of the of the phospholipid molecule are on the inside of the bilayer?
May 26, 2012

vulindlela
I believe that the correct answer is B. Physical activity.
May 22, 2012

Calculus
How do you use imlicit differentiation to differentiate e^(xy)? I have the problem "use implicit differentiation to find dy/dx. e^(xy)+ x^2 - y^2 = 10. I've gotten to the point whereI have d/dx(e^(xy)) + 2x - 2ydy/dx = 0, but I can't go any further because I don&#...
May 22, 2012

Calculus I
Okay, thanks guys!
May 21, 2012

Calculus I
Find the derivative of y=ln((1+e^x)/(1-e^x)) I know that the derivative of y=ln(1+e^x) would be (e^x)/(1+e^x), but I'm not sure what to do with the 1-e^x on the bottom here. Can someone help please? Thanks!
May 21, 2012

Chemistry help PLEASE!!!
The solubility of AgCl(s) in water at 25 C is 1.33x10^-5 M and its deltaH of solution is 65.7 kJ/mol . What is its solubility at 60.1 C ? Please explain how to solve for this!!
April 20, 2012

fourth grade math
if two dice are rolled together,which outcome is more likely-dots totaling 12 or dots totaling 7? explain you anser.
April 12, 2012

Math
Delia works from 8:00 a.m. to 4:30 p.m. and has one hour each day for lunch. How much does she earn for a five-day workweek at $4.80 per hour?
March 1, 2012

social studies
Were cassette tapes famous when they first came out?
February 28, 2012

math
Just pick 3 mid sized cars.
February 20, 2012

algebra 2
The answer is y=2x+7. First put it in point slope form then solve it into slope-intercept form. Use the same slope because having parallel lines means the same slope.
February 10, 2012

biology
A dominant gene A produces wire-haired texture in dogs. Its recessive aamllele a produced smooth hair. Cross the heterozygous wire-haired dog with homozygous smooth-haired dog. List the genotype and phenotype ratios of all the possible offspring.
January 21, 2012

Geometry
the answer to this queston is acute! :)
January 20, 2012

physics
A small cart weighs 15.0 N.  If a constant force of 25 N is  used to move the cart horizontally across the desk, A]  What will be the acceleration of the cart? B]How far will the car move in 1.0 second
December 12, 2011

Physics Help Please
Issac has to do 1000J of work on a 5kg box, and all the work he did simply went into lifting it above the ground. How high above the ground will the box be when all the work has been done?
November 28, 2011

physics
a football punter accelerates from rest to a speed of 8 m/s during the time in which his toe is in contact with the ball (about 0.21 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?
November 20, 2011

physics
a bag of sugar weighs 5.00 lb on earth. What would it weigh in newton on the moon, where the free fall is one-sixth that of the earth?
November 20, 2011

physics
a 8.0 kg object undergoes an acceleration of 2.2 m/s squared.what is the resulting force acting on it?
November 20, 2011

physics
a football punter accelerates a football from rest to a speed of 7 m/s during the time in which his toe is in contact with the ball (about 0.18 s). If the football has a mass of 0.50 kg, what average force does the punter exert on the ball?
November 20, 2011

physics
While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 225 m east, 160 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.
October 24, 2011

nursing
What are ways you provide education to patients in your work place regarding chromic diseases?
October 22, 2011

Nutrion
What types of pathogens? What habits in your food preparation practices do you think might cause these pathogens to grow? What habits can you change in your life to reduce your risk of foodbourne illness?
October 20, 2011

nutrition
Review the nutrition quality of the items, using what you know about daily values, and ingredients (one of the products must have a health claim). Write a 300-500 word essay on what you have learned.
October 20, 2011

nursing
List three key staff of a public health department other than the community or public health nurse.
October 19, 2011

Math
The GCf of my numerator and denominator is 3. I am equivalent to 2/5
October 16, 2011

Spanish-8th grade
This is in regard to my earlier post about the conversation- Thank you for all your help.Thank you for your patience too Could you recheck this? I don't understand about who talks much-my number 10 but I think you put it at #9You said it was the brother not the person but ...
October 12, 2011

Spanish -Sra Please recheck
Thank you for all your help.Thank you for your patience too Could you recheck this? I don't understand about who talks much-my number 10 but I think you put it at #9You said it was the brother not the person but I'm confused why it states me and then habla-doesn't...
October 12, 2011

Spanish 8th grade
I have to read this and answer these questions for homeowrk-I'm not sure if I did this correctly. Could you please check-I put the reading and then questions and my answers under it-thank uyou for checking-I'm really not sure about my answers-I'm a little confused ...
October 12, 2011

Spanish-8th grade
We're learning direct object pronouns so I had to replace the "sellos" in the first sentence-did I do it correctly? Tú coleccionas sellos. Tú los coleccionas.
October 12, 2011

math
What is the standard notation for 3 to the 3rd power
October 3, 2011

algebra
simplify 14a^8y^3-7a^4y^5+28a^12y^2/7a^4y
June 30, 2011

Math-Calc
The lim as x goes to 0- for cos(x)/sin(x). I know the answer is negative infinity but I don't really understand why.
June 8, 2011

Calculus
A rectangle is inscribed with its base on the x axis and its upper corners on the parabola y= 12 - x^2. What are the dimensions of such a rectangle with the greatest possible area?
June 1, 2011

Science
I'm in 6th grade and I need help for my science project. I don't even know what to do. Any fun science projects for 6th graders?
May 21, 2011

lit
is this sentence punctuated correctly ?My grandfather's favorite quotation is E.E. Cummings's, "The most wasted of all days is one without laughter."
May 10, 2011

physics
Two charges are separated by a distance d = 5 m. The charge q1 has a charge of q1= 7.0 µC (microcoulombs) and q2 has a charge of q2= 6.8 µC. What is the force between the charges?
May 1, 2011

accounting
8000
April 20, 2011

Math- Calculus
Let f be a function such that f(-1)=3 and f'(-1)=6 let h(x)=x^5f(x) evaluate h'(x) at x=-1
April 19, 2011

math
If the true population standard deviation was known to be 3.0, then approximately what minimum sample size would you need in a simple random sample if you want a 95% confidence interval for the mean to have a margin of error of .5 or less?
April 14, 2011

math
Find a polynomial f(x) with leading coefficient 1 and having the given degree and zeros. Each polynomial should be expanded from factored form, simplified and written in descending order of exponents on the variable. For example: (x+5)(x-2) should be given as the answer x^2 + ...
April 12, 2011

algebra
if the discriminant of (5u^2)+bu+2=0 is 41, what are all the values of b
March 24, 2011

6th grade Math
Thank you!
March 2, 2011

6th grade Math
9 + 5k = 45 + 2K the sample shows operation S9 to come up with 5K=36+2k assuming subtract 9 from the 45 sample shows K=12 how did they come up with that?
March 2, 2011

geometry
Find the area of a rectangle that has one side measuring 10 cm. and a diagonal measuring 26 cm.
February 14, 2011

Physics- Exercise 10
A 500kg pig is standing at the top of a muddy hill on a rainy day. the hill is 100.0m long with a vertical drop of 30.0m. the pig slips and begins to slidedown the hill. What is the pig's speed at the bottom of the hill? Use the Law of conservation of Energy.
February 3, 2011

Physics
while on the moon, the Apollo astronauts enjoyed the effect of a gravity much smaller than that on earth. if Neil Armstrong jumped up on the moon with an initial speed of 1.51 m/s to a height of 0.700m, what amount of gravitational acceleration did he experience?
February 3, 2011

Chemistry
I'm sorry I'm just really confused by ionization energies and the heat of formation. Could you explain how to set up this problem? Use the data (kJ) for ionization energies, electron affinities and heats of formation to find the lattice energy of Fe3O2(s) according to ...
January 27, 2011

English
The forth one is correct and that is it. The other examples are extremely grammatically incorrect.
December 22, 2010

Algebra1
How would i get the problem to become 3x+5x=17+7...do i add like terms?
December 12, 2010

Algebra1
0.32
December 12, 2010

Algebra1
2x-7+x=11-5x+6
December 12, 2010

11th grade
a rock is dropped from a 20.0m bridge falls into the river below. a.)at whqat velocity does it strike the water? b.)how much time did the rock take to reach the water?
December 12, 2010

physics
when Chris slams a basketball he has a vertical leap of 1.46 meters. what must his initial vertical velocity be in order for him to reach this height?
December 9, 2010

6th grade
Thank you very much for your help. I had the same answer. I'm trying to explain the reciprocal to my daughter, she is worried that her teacher will say the answer is wrong.
December 9, 2010

6th grade
Isn't this a division problem? I have to divide 1-1/2 into two parts.
December 9, 2010

6th grade
I was told that when dividing a mixed number you write the reciprocal of the second number and then multiply and that will change the answer.
December 9, 2010

6th grade
What steps do we use to change 1-1/2 cups in half?
December 9, 2010

Chemistry
What is the ionization energy (in kJ/mole) of the hydrogen-like ion F8+ ?
December 5, 2010

Math
estimate a 15% tip on a $42.65 check
November 20, 2010

Math
yes
November 20, 2010

Algebra
Write the equation of the prpendicular bisector of the line segment AB with endpoints A(1,1) and B(7,5). Write the answer in slope-intercept form.
November 18, 2010

math
Write the equation of the perpendicular bisector of the line segment AB with endpoints A(1,1) and B(7,5). Write your answer in slope intercept form.
November 16, 2010

economics
Can you help me describe National Debt in 2 paragraphs?
November 15, 2010

Chemistry
Based on the balanced equation, C2H4 + 3O2 → 2CO2 + 2H2O calculate the molecules of H2O formed when 135 molecules of O2 are reacted.
November 7, 2010

Chemistry
three different liquids are used in a manometer. (a) derive an expression for P1-P2 in terms of ro(a), ro(b), ro(c), h1, and h2 (b) suppose fluid A is methanol, B is water, and C is a manometer fluid with a specific gravity of 1.37; pressure P2=121.0 kPa; h1=24.0 cm. Calculate...
November 7, 2010

Social studies
What were the economic, political, and social aspects of New Netherland, New Spain and New France?
October 17, 2010

math
A department contains 12 men and 17 women. How many ways are there to form a committee with 6 members if it must have strictly more women than men? It is strongly recommended that you do this on paper! how do i solve this in the calculator?
October 10, 2010

Physical chemistry
100g of water at 30.0C is mixed with 150g of water at 85.0C. What is the final temperature of th mixture assuming no heat is gained or lost during the mixing process?
October 10, 2010

Physics Please Help
convert grams into kilo grams: 95/1000 = .095 kg x = sqrt MV^2/k x = sqrt .095(3.4)^2/70 x = .12525 x = .13 m x = 13 cm
October 7, 2010

College Chemistry
Balance this equations for redox reactions in basic solution. Fe(OH)3(s) + OCl- ¨ FeO42- + Cl-
September 23, 2010

college
Pretend the program in Senegal had been reducing infant mortality at a rate of 11 % per year. How long would it take for infant mortality to be reduced by 39 %?
September 21, 2010

math
write the multiplication/division fact family for 2, 7, and 14.
September 14, 2010

physics
heather and Matthew walk with an average velocity of .89 m/s eastward. it takes them 44 min to walk to the store. what is their displacement?
September 1, 2010

Business
compensation plans, this book calls it pay plan.
July 7, 2010

Business
why do small businesses need a pay plan?
July 7, 2010

math 5th grade
theo's bedroom measures 12 3/4 ft by 9 2/3 ft.
June 3, 2010

math 5th grade
theo wants to put a dinosaur border around the perimeter of his room. How many rolls of border must he buy if each one covers 10 ft?
June 3, 2010

math 5th grade
two numbers have a product of 3 1/5 and a sum of 3 3/5. One of the numbers is a whole number. find the numbers.
June 3, 2010

math 5th grade
Attendence at the firemans ball has been declining. Each year the number attending is 2/3 of the previous years attendence and the cost of food is 3/4 that of the previous year. In what year will the attendence be less than 1/3 the original attendence?
June 3, 2010

math 5th grade
Of the 2800 cars produced one month,1/14 were chosen to be inspected.1/20 failed the inspection. How many cars failed insperction?
May 31, 2010

math 5th grade
A certain piece of a car's material expands by 1/12 its origial length in extreme heat. If the piece begins with a length of 30 in., how long will it be after it expands?
May 31, 2010

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