# Posts by megan

Total # Posts: 1,194

Physics
VERTICAL SPRING A spring of negligible mass, spring constant k = 89 N/m, and natural length l = 1.4 m is hanging vertically. This is shown in the left figure below where the spring is neither stretched nor compressed. In the central figure, a block of mass M = 2 kg is attached...

Social Studies
THANKS

science
9.8m/ss

Physics
Two identical cars (m = 1350 kg) are traveling at the same speed of 28.1 m/s. They are moving in the directions shown in the drawing. What is the magnitude of the total momentum of the two cars?

physics
170dB

elementary functions
f(x)=x(squared)+x-3. compute the difference quotient: (f(x+h)-f(x))/h

Physics
How long does it take T-Rex to reach its food 200m away assuming that he starts from rest and accelerates at 4.00 m/s2?

physics
Sheena can row a boat at 3.13 mi/h in still water. She needs to cross a river that is 1.10 mi wide with a current flowing at 1.75 mi/h. Not having her calculator ready, she guesses that to go straight across, she should head 60.0° upstream. (a) What is her speed with ...

K=[fe3+][OH-]^3

math
factor (m/4 + n/3)(3m/4 - 2n/3) Is this the answer? if not, what did I do wrong? 3m^2/16 + mn/12 - 2n^2/9

math
solve for c: 3/4(2c+3)+3/5(8c-2)=9c

math
a ship leaves a port at 6 am traveling due east at 12mph. another ship leaves a port 11 am traveling due north at 15 mph. how far apart are they at 11pm to the nearest tenth mile?

math
When I went kite flying the other day, I let out an entire roll of string (400 feet). If when the string pulled tight formed a 40 degree angle with the ground, about how high was the kite?

math
Two metal alloys, containing 26% copper and 54% copper are to be mixed together to get 210 oz that is 30% copper. How much of each should be used?

Stats
Two dice are tossed. What is the probability that the sum of both dice is a prime number? this is the answer i have ; Presuming two fair, 6-sided dice, each numbered 1 through 6: You can achieve one of the following results on any given roll: 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12...

Economics
What do you think are the pluses (advantages) and minuses (disadvantages) when firms have market power? Be sure to explain your answer from a consumer and a firm’s point of view. why did ESPRIT closed all stores in the U.S. Include a few of these word Diseconomies of ...

Economics
What do you think are the pluses (advantages) and minuses (disadvantages) when firms have market power? Be sure to explain your answer from a consumer and a firm’s point of view. why did ESPRIT closed all stores in the U.S. Include a few of these word Diseconomies of ...

Chemistry
What is the normality of a solution which contains 4.03-g of sodium carbonate in 300.-mL of solution?

Social Studies help needed
THANKS @smart one :)

government
which provides evidence that political parties are not as strong as they once were? A. the increasing number of independents B. the lack of straight-ticket voting C. increased spending on campaigns D. increased numbers of registered Democrats

Governmnet
which of the mass media has the most impact on american politics? A. television B. the internet

Math
There are 6 members in a club and only 4 computers.Club meets for 60 minutes. Each member wants equal computer time. How much time should each student have?

math
Fred arrives at the subway station every day at a random time and takes the first train that arrives. If he takes the A train, which arrives each hour on the hour, he ends up at the fitness center. If he takes the B train, which arrives every hour 15 minutes after the A train...

math
A small grill can hold two hamburgers at a time. If it takes 5 minutes to cook one side of a hamburger, what is the shortest time needed to cook both sides of five hamburgers? 30 15 20 25

I agree with Ms. Sue. Negative number play seems to be the problem with the incorrect problems.

Chemistry
How do you find the equilibrium constant of: B + O2 <-> BO2 ??

Calculus
A rectangle in the first quadrant has one vertex as the origin, and other vertex on the curve y= -x^2 -2x +4. If the rectangle has one side lying on the x-axis, find the largest possible area of the rectangle.

Calculus
A rectangle in the first quadrant has one vertex as the origin, and other vertex on the curve y= -x^2 -2x +4. If the rectangle has one side lying on the x-axis, find the largest possible area of the rectangle.

Statistics 7
A doctor wants to estimate the HDL cholesterol of all 20 to 29 year old females. How many subjects are needed to estimate the HDL cholesterol within 2 points with 99% confidence assuming s-17.8 based on earlier studies. Suppose the doctor would be content with 90 % confidence...

A doctor wants to estimate the HDL cholesterol of all 20-29 year old females. How many subjects are needed to estimate the HDL cholesterol within 2 points with 99%confidence assuming s=17.8 based on earlier studies? Suppose the doctor would be content with 90% confidence. How ...

Stats help
A poll conducted in 1972 asked 1003 people, " During the past year, about how many books did you read either all or part of the way through?" Results of the survey indicated that x-bar=18.9 books and s=1 9.9 books. A)Construct a 95% confidence interval for the mean ...

Stats help
MathGuru, how do i determine the z-score for this one?

Stats help
A poll conducted in 1972 asked 1003 people, " During the past year, about how many books did you read either all or part of the way through?" Results of the survey indicated that x-bar=18.9 books and s=1 9.9 books. A)Construct a 95% confidence interval for the mean ...

STATSHELP
Got it thanks!

STATSHELP
Thanks!!!!!!!!!

STATSHELP
A poll was conducted that asked 1015 people how many books they had read in the past year. Results indicated that x-bar= 12.3 books and s=16.6 books. Construct a 95% confidence interval for the mean number of books people read. ____, _____ PLEASE HELP ME!!!!!!!!!!!!

STATISTICS
THANK YOU!

STATISTICS
Determine the point estimate of the population mean and margin of error for the confidence interval. Lower bound is 15, upper bound is 27. A)The point estimate of the population mean is ________. B) The margin for error for the confidence interval is _______. HELP

Statistics
THANK YOU

Statistics
A researcher wishes to estimate the proportion of adults who have high-spped internet access. What size sample should be obtained if she wishes the estimate to be within .02 with 90% if A) She uses a previous estimate of 0.48? B) She does not use any prior estimates? Please ...

Square root is just a fancy word for a number multiplied by its self. So you can also look at a very large multiplication table and look at 5 x 5 and 25 x 25 and so on.

stats
From previous records, a shipping company knows that the cost to deliver a small package within 24 hours is \$15.50. The company charges \$17.95 for shipping, but guarantees to refund the full charge if the delivery is not made within 24 hours. If the company fails to deliver ...

Stats
Recall that in the week 2 assignment, a certain company hired three new managers from a pool of seven men and five women. All three hires were women, and the men complained of gender bias. Compute the theoretical probability that a fair selection process (in which each person ...

math
If you randomly select one jar containing two cherry candies, two liquorice candies, and one peppermint candy, What is the probability of selecting a cherry candy? 1/6 1/5 1/3 2/5

science
Meiosis is reproductive process that produces four haploid sex cells from one diploid cell and ensures offspring will have the same number of chromosomes as the parent organisms.

science
Asexual reproduction is a type of reproduction----fission, budding, and regeneration---in which a new organism is produced from one organism and has DNA identical to the parent organism. Sexual reproduction is a type of reproduction in which two sex cells, usually an egg and a...

Math
Thanks

Math
I know that I am saying this is how I am going to explain it. There is an answer choice it has: choice a)n/18 = 252 Choice b) 252/n = 18 Choice c) 18=n/252 Choice d) 252= 18/n Which is correct?

Math
Because I don't know how to post answer choices in FRACTION form???????

Math
All of my answer choices are in fraction form....

Math
Pam gave 252 water balloons to the people who came to a summer party. Each person received 18 balloons. Which equation can be used to find n, the number of people who came to the party?

Precalculus
Jessica deposited \$785 into an account that pays 6.2% interest compounded continuously. How long will it take until Jessica has \$1000?

Statistics
IQ score are normally distributed with a mean of 95 and a standard deviation of 17. If the sample size is n=36 find the mean and standard distribution of sample mean

Science
How do the oceans support life? How have the oceans and their marine life changed through time?

Chemistry
Okay so I'm having a brainfart here. I'm doing a titration problem and have got to the point of: 3.6x10^9 = (.01218-x)/(x)(.00316+x) I don't know how to proceed from there and use the quadratic formula as silly as it sounds. Any help would be appreciated!

Math
So then the equals 3.3 ???? that's not an answer choice

Math
One week, Mrs. Peterson went to her health club on Monday, Wednesday, and Friday. Each day she went to the club, she jogged on the treadmill for 3/5 hour, lifted weights for 1/4 hour, and then cooled down by stretching for 1/4 hour. On Saturday, she rode her bike for 3/4 hour...

Algebra 1
4. What is the value of the 11th term in the sequence? -1 , 5 , 11 , 17 , 23 , ...

physics
Calculate the mass needed in order to suspend the leg shown in the figure(Figure 1) . Assume the leg (with cast) has a mass of 14.0 , and its CG is 34.0 from the hip joint; the sling is 81.5 from the hip joint.

Accounting 1
Red Bank Enterprises was involved in the following transactions during the fiscal year ending October 31: 8/2: Borrowed \$75,000 from the Bank of Kingsville by signing a 120-day note. 8/20: Issued a \$40,000 note to Harris Motors for the purchase of a \$40,000 delivery truck. The...

Ecology
It's 3. Alter the environment. The rest are incorrect.

Help!!!
Help!!!

chemistry
Help??

chemistry
It was a very cold day -10 C. Victor went outside to pick up the morning newspaper. He quickly noticed the icicle that formed on the nearby flagpole. Curiosity got the best of him, and he decided to lick the ice on the flagpole. Instantly, Victor's tongue is attached to ...

Math
The total resistance of two circuits in parallel is 18 ohms and one circuit has five times the resistance of the other, find the resistance of each circuit. Use 1/R=1/R1+1/R2. R1 and R2 are two individual resistances. a)Find the smaller resistance b)Find the larger resistance

Math
The total resistance of two circuits in parallel is 15 ohms and one circuit has five times the resistance of the other, find the resistance of each circuit. Use 1/R=1/R1+1/R2. R1 and R2 are two individual resistances. a)Find the smaller resistance b)Find the larger resistance

math
a person can copy the final exam in 28 minutes using a new copy machine. using an old copy machine, it takes 70 minutes. if both machines are used, how long will it take to complete the job

Math
someone can mow his lawn in 48 minutes. if his daughter helps, they can do it in 40 minutes, how long would it take for his daughter to mow the lawn by herself?

physics
The speed of all electromagnetic waves in empty space is 3.00 × 108 m/s. What is the wavelength of visible light emitted at 7.2 × 108 MHz? Answer in units of m

Science
How do mutations lead to cancer?

Science
How do mutations lead to cancer?

Social Studies
The anonomous answer is 100% correct!!!!

Social Studies
I do not know @a but I am doing the test and I will tell you when I am done, hopfully it is right

Social Studies
I do not know a but I am doing the test and I will tell you when I am done, hopfully it is right

Math

Science
Thanks so you add 3+4+2.5=9.5 for distance. 25+40+30=95 9.5km/95min=0.1km/min=6 km/hr. so 6km/hr is the answer to everything or this whole problem?

Science
Help!!!!!!

Science
George walks 3 km on Monday and 4 km of Tuesday and 2.5 km on Thursday. On Monday, he walks 25 mins., Tuesday 40 mins., and Thursday 30 mins. What is his average speed? d= t= help please

chemistry
A catalytic converter combines 2.55 g CO with excess O2. What mass of CO2 forms?

math
I am sorry you are just confusing me by all these numbers!!!!!!!!!!!!

math
So 975\$ is the answer to the whole math problem?

math
Okay.

math
Okay thanks I kind of understsnd it now

math
Thanks Jessica? But I don't know

math

math

math
Would I divide 300 by 2.50?

math
Hello! I am confused on how to do this math problem. Can you please help me or explain how you get this answer please? Miriam orders a shipment of 1, 500 pounds of ice for her supermarket. The ice comes in individual 5-pound bags that cost Miriam orders\$2.50 each. Miriam sells...

Chemistry

Chemistry
Help!!!!!!!!!!!! Fe + CuSO4 --> Cu + FeSO4 2.05g 7.00g 2.46g 151.8g Which reactant was limiting and how does this chemical equation support this? The numbers beneath the names are the masses in grams.

Physics
You first have to find the acceleration of what is given. F1 has force of +8.0N, and box has mass of 4.7kg. F = ma, so 8.0/4.7 is 1.7m/s2. Now to view the other question, you'd use the same equation only this time, you need to use the newly acquired acceleration from above...

math
75%? Who is Jessica?

math
Find the % of Discount Regular Price \$25,000 Sale Price \$22,000

Math
Now how would I do this? This is so confusing. LUNCH You bought 3 pieces of chicken that cost x dollars each, a salad for \$3, and a drink for \$1.

Math
4(y-3)+9-3y I come out and get 4y-12+9-3y What do I do now? I'm so confused! I don't know it !:(

Math
Hello! I am needing some help on Algebra! It is hard ! Can you explain how to Simplify Algebraic Expressions? The easiest way? I have a test over it Friday, and i can't understand it at all! Can you help with these and explain? -12z+4(z-9)+30+z and 4(y-3)+9-3y

chemistry
would the ratio of moles of Cu:moles of CuCl2 differ from atoms of Cu:formula units of CuCl2? Why or Why not?

Spanish
1) B 2)C 3)B 4) B

Science
Hello Steve. I have another question... why is Meiosis important?

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