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Posts by Martha

Total # Posts: 326

Physics
What is the magnitude of the electric field 0.3 m from a 10-4 C point charge?

pre calculus
24

math
perform the indicated operation and expres your answer in simplest radical form ^3 sqrt 8 / ^4sqrt 8

economics
galacia will produce and export soup and fancia produce and export galacia

calculus
Wiley jumps straight up in the air from the edge of a cliff so that when he comes down he falls off the cliff. The cliff is 40 feet off the ground. His height t seconds after he jumps is s= -16t2 + 12t + 40.What is the maximum height? What is his maximum velocity?

calculus
let f(x) = 2x^5-5x^4 find open intervals on which f is a) increasing b)decreasing Find values of x at which f has c) relative max and min find open intervals d) concave upward e) concave downward c) find the inflection points of f

Physics
How many calories it take to elevate the temperature of 10 gr of water-from 26C to 50C?

MATH
BENNY PLAYS TWO SPORTS. HE PLAYS SOCCER FOR 3/4 OF THE TIME AND PLAYS BASEBALL FOR 30-MINUTES. HOW MANY MORE MINUTES DOES HE PLAY SOCCER THAN BASEBALL? My answer is he plays soccer 7 minutes more. Am I correct. How do I make a diagram for this problem. Thanks

Math
thanks

Math
Ms. Kenny grew 3/5 as many zinnias as Mr. Hadam. If Ms. Kenny has 12 zinnias, how many zinnias do they have in all. I calculated that they have 20 zinnias total. Am I correct. Thanks

Jr. Math
thanks

college algebra
solve x^6 - 64 = 0

College Algebra
solve the equation for r: S= (rL-a)/(r-x)

math
how would you fidn the area of a square if you know one side is 4 feet long

Math
2336.8

physics
Landing with a speed of 87.7 m/s, and traveling due south, a jet comes to rest in 939 m. Assuming the jet slows with constant acceleration, find the magnitude and direction of its acceleration. Magnitude of acceleration

math
a convenience store sells 1650 items,are of 12/25 junk food

Physics
Assuming that the Earth is spherical and recalling that latitudes range from 0° at the Equator to 90° N at the North Pole, how far apart, measured on the Earth's surface, are Copenhagen (55.67° N latitude), and Rome (41.90° N latitude)? The two cities lie ...

math
The equation of a parabola is y=(x-5)^2-4. Is the point (5,-6) on this parabola?

math
Find the value of C that will make 25x^2-40x+c a perfect trinomial.

math
Nine cards are numbered 1-9. what is the probability of drawing a number greater than 6 or an odd number. I know the answer is 2/3 but I don't know how you find the probability when it says "greather than 6 OR and odd number"... how do you calculate the OR?

math
Given a right triangle ABC, if the measure of angle B=30 degrees, the measure of angle C=90 degrees, and AB=5cm, find AC

Chemistry - Equilibrium
You have an unknown concentration of ammonia. When you add 15.0mL of a 0.400 M HCl solution to 50.0mL of the ammonia solution, the pH of the solution becomes 8.75. What is the concentration of the original ammonia solution? [Kb (NH3) = 1.8 x 10^-5]

math
only 5% of the carbon-14 in a small wooden bowl remains , how old is the bowl? Hint, half-life for carbon –14 us 5730 years

math 125
solve the system 2x-3y-z=-8 x-y--z=-2 -4x+3y+z=6

physics
A certain spring stretches 5.0cm when a load of 40N is suspended from it. How much will the spring stretch if 46N is suspended from it(and it doesn't reach its elastic limit)?

math
how would you solve: (t-2)(3t-1)(4t+3)-(2-t)(2-t)(t+5)

biology
Can someone please explain to be the concept of - Rate of exchange is proportional to a cells surface area and ... the amount of exchange material is proportional to a cell's volume. (the topic we are learning is called "Animal form and function")

Languages
How do you say the word "love" and "kind" is many languages. (the language doesnt matter, a list would be great)

algebra
2w -4 = l 2w +2l = 172 plug in for l and find w. then plug in w to find l then a=lw

Pre-Algrebra
1. first distribute 2(m+3) = 2m + 6 then add like terms together 3m + 6 = 78 then sub. 6 3m= 72 last divide by 3 m=24

History- spanish
thanks

History- spanish
i already searched that under google and most of the sites only showed and described a certain painting of his. And no i couldn't find it. It doesnt say this birthname was anything different than Jose antonio Velazquez so is that it??

History- spanish
What was Jose Antonio Velazquez's birth name? I do not know if that is his birth name

science
I have a test tomorrow and i need to be able to say what type of bacteria something is in their agar colonies. I am having a hard time diffirentiating between bacillus cereus and bacillus subtilis. does anyone have any good websites that would help? or know any tricks?

science
what does oxytetracycline contain that would destroy bacillus cereus

Physics
The Victoria Falls is the tallest waterfall on Earth measuring 108 meters at its highest point. How long will it take for a single drop of water to fall over its edge into the chasm below? Please check answer, if I am doing it incorrectly help me set it up. the last person who...

PHYSICS
The Victoria Falls is the tallest waterfall on Earth measuring 108 meters at its highest point. How long will it take for a single drop of water to fall over its edge into the chasm below?

english
I have a four page paper I have written for a scholarship. It is still in its rough draft. Would anyone be willing to proof read it?

Misc.
is there a site online that i can find it?

Misc.
How do you know what township you are in?

chemistry
treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?

chemistry
treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?

chemistry
treatment of a 0.3203g sample of impure soduim chloride with an excess of AgNo3 resulted in the formation of 0.7331g of AgCl. how many grams of sodium chloride were in the sample? What is the weight percentage of NaCl in the sample?

Literacy
Which Boolean operator limits your search so that each term input must be in the same document

Math
At the school store, colored pencils are reduced from $2.40 a box to $2.00 a box. What is the percent of decrease?

bio
thanks the peptidoglycan is pretty clear. but, do you think you could explain the difference between an exon and intron?? in more simple terms

bio
What are introns and exons? also what is a peptidoglycan( i hope i spelled that right)

science
hello! I need good sites that can help me with my physics class! do you have any ideas??

Physics
An airplane flies due north at 220 km/h with respect to the air. There is a wind blowing at 65 km/h to the northeast with respect to the ground. What are the plane's speed and direction with respect to the ground?

economics
Market demand is given as QD = 200 – 3P. Market supply is given as QS = 2P + 100. Each identical firm has MC = 0.5Q and ATC = 0.25Q. What is each firm’s profit?

economics
A monopolist faces market demand given by P = 200 – Q. For this market, MR = 200 – 2Q and MC = 3Q. What quantity of output will the monopolist produce in order to maximize profits?

geometry
what is the value of x , if one lenght is 16, and the other one is 23

Chemistry
How much energy (in kcal) is needed to convert 53.2 g of water at 55.0 C to steam at 100.0 C

Physics
Two teams are having a rope pulling contest. Team A is pulling with a force of 2400 N at 135 and team B is 1550 N at 315. What is the resultant force?

help please:)
the answer is c

Algebra
Thanks! That's what I thought

Algebra
Hello, I have been trying a few ways to do this problem and am not having success. The sum of four consecutive odd integers is -212. Write an expression for the second, third and fourth odd integers. Use these expressions to write, and solve an equation to find the four ...

professional communication
explain the importance of five sentence starters that you can use in a professional presentation?

physics
A car moves at a constant speed of 24m/s. How long (in minutes) will it take to travel 15.0 km?

physics
a ball is released from rest and rolls down a slope. It covers 7.5m in 12.4s. Find the average speed of the ball in m/s and km/hr.

physics
A distance runner moves at a constant pace of 4.1m/s. how far (in m) does he move in 30 minutes?

statistic
solve the problem :score a test are normally distributed with a mean of 68.2 and a standard deviation of 10.4 estimate the probablility that among 75 randomly selected students, at least 20 of them score greater than 78

College chemistry
is dispersion force the strongest IM for Cl2

Math
Part of 26000 invested at 4% interest and the rest at 2% interest yields 680.00

grammar
Although the abscess was incised and drained in the emergency room and cultures were obtained, which grew coag-positive staphylococcus.

grammar
5.After lengthy discussion, it was decided the patient would continue to be treated in the hospital. Is there any conjuction in this sentence.

life orientation
i dnt knw dat is y im asking plz help

Life orientation
Dnt knw them,i have choosen the topic of pollution.can u plz give me those answer

English Honors - Tale of Two Cities
Hello, I can't figure out the significance of the quote in Tale of Two Cities: "Drive him fast to his tomb". I know it signifies the beginning of the revolution but I'm not sure why.

physics
Two charged spheres are 8.00 apart. They are moved, and the force on each of them is found to have been tripled

Physics
A certain coiled wire with uneven windings has the property that to stretch it an amount s from its relaxed length requires a force that is given by , so its behavior is different from a normal spring. You suspend this device vertically, and its unstretched length is 19.0 cm. ...

Advance Accounting
How do I prepare a consolidated elimination worksheet when the parent purchases all of subsidiary's bonds on open market?

Math
Solve for X. X^3=27 x = 3 because 3 * 3 = 9 and 9 * 3 = 27. Correct? -------------------------------------- [x]= 16 X = 4^3 because 4 * 2 = 8 and 8 * 2 = 16. Correct? -------------------------------------- (x-2)^4=16 I need help on this one!

Basic math
Compute. 3/2 - 4 1/3 The answer I got was 4 2/1.

theory of dressmaking
what is disposal of fullness

Math
You have 48 yellow blocks and 40 green blocks. What is the greatest number of identical towers that you can build using all 88 blocks?

math
show how 30/56 is smaller than 5/7 and 6/8

9th grade Math
i need help with my homework

Math
Place the digits 2, 4, 5, 6, and 8 in the boxes to obtain (a) the greatest difference (b) the greatest product I came up with A. 865 - 24 B. 865 * 42

Math
E89QEH

Math
Six cards numbered 1 through 6 are placed in a hat. One card is taken from the hat. The unit's digit of the sum of the numbers on the remaining cards are 9. What was the number on the card taken from the hat?

Family day care regualtions educational levels
Put this in order from begining to last associates degree 40 hour training bachelors degree cda degree or FCCPC associates thanks

Math
Using the digits 0, 2,3 ,4 5, 6 make the largest 4 digit in terms of value that you can.

ALGEBRA2
COULD YOU PLEASE CLARIFY "EXPANDED VERTICALLY BY A FACTOR OF 3"? THANK YOU SO MUCH.

social studies
I THINK THEY WISH TO CONVERT ALL PEOPLE TO THEIR RELIGION, BUT PLEASE NOTE I AM NOT 100% POSITIVE ON THIS AND I DON'T WANT TO SPREAD ANY FALSE RUMORS! I SINCERELY WISH YOU THE BEST OF LUCK IN YOUR HOMEWORK ENDEAVOR!

LIMIT(CALCULUS)
YOU MIGHT WANT TO TRY PLUGGING IN THE TWO, AND THEN OF COURSE THE REST OF THE SOLUTIONS WILL BE GREATER THAN THE ONE YOU PUT THE TWO INTO. I SINCERELY HOPE THAT HELPS! *PLEASE NOTE I'M NOT 100% POSITIVE ON THIS! THIS IS JUST A SUGGESTION! I WISH YOU THE BEST OF HOPE!

college physics
Find the height from which you would have to drop a ball so that it would have a speed of 8.4 m/s just before it hits the ground.

statistics/probability
describe the sample space for a spinner with four equal sections of blue, red, green and yellow.

chem 121
We did a lab separating out the components of a mixture. One of the lab questions is "The weight of naphthalene was obtained by weighing the collected solid. Was this an accurate weight of the naphthalene present in the original sample?" I don't know how to ...

Science
A boy walks a total distance of 210 km due North. His starting position is at 20 km and his final position is 34 km. If it takes him 3 hours and 20 minutes to make this trip, what is his total velocity? What is his speed?

math
if $1747.56 is including HST, what is that price without the HST?

History
Describe Sumerian religious practices

civics
who are some good citizens? for example terry fox or mother teresa. i need people other than them

science
2.64*10^-5

science
A 0.513 M solution of a weak base has a pH of 11.4. What is the Kb of the base?

chemistry
A 0.010 M solution of aspirin, a weak monoprotic acid, has a pH of 3.3. What is the Ka of aspirin?

math
what precent of 3.5 is 7.2? show your work please.

us history
is there any one out there to help me

us history
a time line tracking the major themes/paradigm shifts in American History from the Columbus's voyages through the Mexican-American War (1846-1848).

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