# Posts by alejandra

Total # Posts: 81

**Math**

How many buses with the school need if only 40 students can ride on each bus

*August 29, 2016*

**Math**

5 units

*June 17, 2016*

**Algebra 1**

The perimeter of a rectangle is 300 feet the width of the rectangle is 10 feet more than the length what is the width of the rectangle ?

*May 16, 2016*

**Science**

Consider the following food chain: hawk - rabbit - clover. Each species will contain a different amount of calories in its body (clover: 10 calories, rabbit: 500 and hawk: 1200). Each species has a different daily caloric requirement (clover: sunlight, rabbit: 100 calories, ...

*May 5, 2016*

**Science**

Consider the following food chain: hawk - rabbit - clover. Each species will contain a different amount of calories in its body (clover: 10 calories, rabbit: 500 and hawk: 1200). Each species has a different daily caloric requirement (clover: sunlight, rabbit: 100 calories, ...

*May 5, 2016*

**physics**

A 4.53 kg particle has a velocity of vx = 3.98 m/s and vy = −3.16 m/s. Find the magnitude of its total momentum. Answer in units of kg · m/s

*November 20, 2014*

**economics 6**

Annual per capita consumption of milk is 21.6 gallons (Statistical Abstract of the United States: 2006). Being from the Midwest, you believe milk consumption is higher there and wish to support your opinion. A sample of 16 individuals from the mid western town of Webster City ...

*September 7, 2014*

**economics 5**

At Western University the historical mean of scholarship examination scores for freshman applications is 900. A historical population standard deviation = 180 is assumed known. Each year, the assistant dean uses a sample of applications to determine whether the mean ...

*September 7, 2014*

**Chemistry**

How many grams of bromine are required to react completely with 37.4 grams aluminum chloride?

*March 21, 2013*

**Chemistry**

How many grams of bromine are required to react completely with 3704 grams aluminum chloride?

*March 21, 2013*

**Pre-Algebra**

what type of association would you expect betwee a persons age hair length?

*March 19, 2013*

**algebra**

jordan has two numbers that have the sum of 64. those same two numbers have a difference of 42. what are the numbers?

*January 10, 2013*

**chemistry**

0.2688 of a monoprotic acid neutralizes 16.4mL 0f 0.08133 M KOH. Calculate the molar mass of the acid in units of g/mol

*November 27, 2012*

**Physics**

1.The units on both sides of the equals sign, expressed in SI base units, must be the same. 3.Ns (mv=Ft) 4.N.s 5.N/C

*October 17, 2012*

**social studies**

list examples of sumerian literature

*September 6, 2012*

**physics**

eric has a mass of 60 kg. he is standing on a scale in an elevator that is accelerating downward at 1.7m/s^2. what is approximate reading on the scale?

*December 15, 2011*

**us history**

How important are Edison's inventions in American life today?

*November 26, 2011*

**us history**

Why did railroads and the telegraph expand together?

*November 26, 2011*

**geometry**

given triangle ABC is congruent to triangle PQR, AB = 38 .QR = 28 and PQ = 5x+8 . find x value

*November 1, 2011*

**geometry**

18 is the answer

*November 1, 2011*

**CHEMISTRY**

A sample of C3H8 has 2.64 x 10^24 atoms. How many carbon atoms does the sample contain? What is the total mass of the sample?

*September 24, 2011*

**Chemistry**

A sample of C3H8 has 2.64 x 10^24 atoms. How many carbon atoms does the sample contain? What is the total mass of the sample? I don't even know where to start i mean it seems like a really simple question but the prof hasn't been through this topic. Im working a bit ...

*September 24, 2011*

**science**

whats a meteorite?

*March 1, 2011*

**geometry**

If AD is 10 units AB is 8 units AC is 12 is units ED is 4.5 units and if AED is 100 degrees what is the measure of DC

*February 10, 2011*

**Algebra**

I do not Know

*February 1, 2011*

**math (comparing ratios)**

the question says →4 feet to 4 inches and i have to do it in simplest form

*February 1, 2011*

**4th grade**

24

*December 13, 2010*

**3rd grade math**

Marlon has 4 cards, Jake has 4 cards, and Sam has 3 cards. Can you write a multiplication sentence to find how many cards they have in all? Explain

*November 28, 2010*

**statistics**

The caffeine content of a cup of home-brewed coffee is a normally distributed random variable with a mean of 115 mg with a standard deviation of 20 mg. (a) What is the probability that a randomly chosen cup of home-brewed coffee will have more than 130 mg of caffeine? (b) Less...

*October 24, 2010*

**Physics**

A 4.52 kg block slides down a smooth, fric- tionless plane having an inclination of 31◦ . The acceleration of gravity is 9.8 m/s2 . Find the acceleration of the block. Answer in units of m/s2.

*October 16, 2010*

**algebra**

i have a homework problem that i don't know how to do it the question to the problem says: Find the value of expression.identify the property used in each step and the problem is:7(10-1x3)

*October 14, 2010*

**physics**

A 3.0 kg block is pushed along a horizontal floor by a force F of magnitude 19 N at an angle θ = 30° with the horizontal. The coefficient of kinetic friction between the block and floor is 0.25.(a) Calculate the magnitude of the frictional force on the block from the ...

*October 2, 2010*

**math**

they burried him six feet down and eight feet up

*December 16, 2009*

**changes in matter**

What happens whensodium chloride and silver nitrate react in a replacement reaction?

*March 1, 2009*

**5TH GRADE**

ALGEBRA. EQUATIONS FIND N. 3,7,14,15,17,46,N RANGE:43 MODE:N MEDIAN:15 MEAN:N

*September 30, 2008*

**5th grade math**

EQUATION FIND N. 3,7,14,15,17,46,N RANGE:43 MODE:N MEDIAN:15 MEAN:N

*September 30, 2008*

**Spanish**

THE MEANING OF ACTRIZ IS TO ACT.

*September 30, 2008*

**Sapnish 2**

SON

*September 29, 2008*

**Spanish**

SON LA ONCE Y MEDIA DE LA MANANA.

*September 28, 2008*

**Literature**

answer to # 3 is novel

*April 18, 2008*

**math**

Does anyone know how to clear the table on a TI-84 graphic calculator?

*February 28, 2008*

**math**

lcm is hard for me can you give all the anwers to my homework please

*November 26, 2007*

**chemistry**

atoms of the same element with different atomic masses are called isotopes. I don't do these fill in the blank problems without limit. You need to do some work before posting many more. Of give us some indication that you are doing more than just filling in blanks.

*February 13, 2007*

**chemistry**

the number of protons in the nucleus of an atom is called the.... atomic number

*February 13, 2007*

**physics**

what are the units of wavelengh They can be any length units, but it is common to use meters for radio waves, centimeters for microwaves, micrometers for infrared, and nanometers or Angstroms (10^-8 cm) for visible and ultraviolet light. Regardless of what I wrote in my ...

*December 7, 2006*

**physics**

what are the 4 main kinds of long-distance communication? I have no idea what you mean here, in physics. Can you explain?

*November 10, 2006*

**active physics**

from the question we just did, how much force is neede to stop in 20 seconds! OK. think it through. If it's going at 10 m/s, and then it stops, what is it's change in velocity? is it 10 Yes, now it takes 20 seconds, so what is its acceleration (actually deceleration)? ...

*November 2, 2006*

**active physics**

a=change in velocity/time, is this the formula i use for this question: a car takes 5 seconds to speed up from 10 m/s to 60 m/s. what is the acceleration? yes! so what do i do from there? If it goes from 10 to 60, what is it's CHANGE in velocity (speed)? is it 50 Yes...so ...

*November 2, 2006*

**active physics**

a 25 mewton force pushes against a 5 kg. mass. what is the acceleration??? what formula do i use?? F=ma

*November 2, 2006*

**PHYSICS HELP**

how would you change both the tension and the lenght and keep the pitch the same? oh. i think this question is a bit too vague. what does the apparatus look like? otherwise it seems like you could do whatever you wanted to the string (e.g., attaching a weight to one end of the...

*October 30, 2006*

**physics**

explain how you can change the length of a vibrating string.

*October 30, 2006*

**physics**

explain how you can change the tension of a vibrating string. you can probably change the tension by keeping the rate of the vibration constant and shortening the length of the string.

*October 30, 2006*

**MATH**

i need help filling this out! 4x-10=32-3x 4x-10+____=32-3x+22 ____-10+____=32+_____ ___=___ ___=___ x=___ ok you need to solve for x. remember the rule, whatever you do on the left side, you do to the right side and vice versa. on the second step, they add 22 to the right side...

*October 24, 2006*

**science**

i need help to fill in the blank: if lava has a high content of the mineral__________, it makes a volcano erupt explosively http://www.sciencedaily.com/releases/2003/11/031128083028.htm

*October 17, 2006*

**science i need help**

what is the realtionship between the focus and the epicenter? the focus is the depth of an earthquake, the epicenter is the center of the earthquake.

*October 15, 2006*

**science**

do earthquakes occur in areas without identified large faults? The key words you use are "identified" and "large." As far as I know, earthquakes occur at fault lines, whether or not they have been identified or are large. Since this is not my area of ...

*October 12, 2006*

**science plz help**

do earthquakes correlate with identified large faults? do earthquakes occur in areas without identified large faults? Yes.

*October 12, 2006*

**earth science i need help**

what is the relationship between the focus and the epicenter of an earthquake? http://www.sciencecourseware.org/VirtualEarthquake/ earths early atmosphere formed during the early archean era. Which gas was generally absent fro mthe atmosphere at this time

*October 4, 2006*

**solution of an equation**

can someone please give me an example of a solution of an equation An equation is a statment with the equal sign = in it. If we have y=2x+3 and we're asked to find x when y=7 then we would have to solve 7=2x+3 The solution of that equation is x=2. Was there a specific ...

*September 28, 2006*

**math**

give me an example of a verbal model http://www.google.com/search?hl=en&lr=&as_qdr=all&q=+%22verbal+model%22+example&btnG=Search

*September 28, 2006*

**i need help completing this MATH question!**

ORDER OF OPERATIONS step 1. first do operations that accur within_____________. step 2. then evaluate_________. step 3. then do_________and_______from left to right. step 4. finally, do______and_______from left to right. here are your choices in alphabetical order: addition ...

*September 28, 2006*

**I NEED HELP MATH**

i have my input output table but i don't know how to complete the sentence inputx / 0/ 1/ 2/ 3/ outputy/ 0/ 1/ 4/ 9/ the question is: does the table represent a function?juatify your answer. ___,because for each____there__ exactly one____. It will be a function if for each...

*September 26, 2006*

**definition for science**

the definition for longitude(meridians) The easiest thing to do is to look it up in the dictionary. Go to www.dictionary.com or to www.google.com The definition of coriolis Effect

*September 13, 2006*

**anyone plz check if its right**

(4q+2)-(2q-3) if i simplify it will it be 2q+5? correct You can drop the parentheses and rearrange the terms to get (4q+2)-(2q-3)=4q-2q + 2-(-3)=2q+5 definately correct! i don't think that it is that hard if you drop the brackets you can't doubt it!

*September 13, 2006*

**can someone please check if im right : math**

4(3x+7) is this the equivalent expression : 12x+28 Yes it is, that' using the distributive property. ok. how do i get the opposite of an expression example : -10t+21 The opposite? Do you mean the negative or additive inverse of the expression? If so then multiply it by -1...

*September 12, 2006*

**scientific notation**

how can i put 10010 into a scientific notation We want the first digit from the left followed by a decimal then some power of 10 Here it's 1.001 x 10^?? How many decimals did we move to the left?

*September 12, 2006*

**MATH**

how many milligrams are there in a kilogram I give up alejandra. I showed you how to count your way to the answer and you keep posting. We don't give answers but we try to help you understand so you don't need us. Please go back and count your way from milligrams to ...

*September 11, 2006*

**science math**

how many decimeters are there in a decameter Go back to my post and count. Then post your answer here. You can check your answer at google but I will be happy to check it also. 100 decimeters. I'm sure of it! Decimeters

*September 11, 2006*

**math**

i still don't get it im comfused on how many centimeters are there in a decimeter, a meter, and a hectometer 10cm=1dm 100cm=1m 10000cm=1hm There are 100 centimeters in a meter. We know that becase of the prefix centi-. Please re-read DrBob222's post. It explains the ...

*September 11, 2006*

**math:roger plz check if im right**

how many decimeter are there in a meter: .1m a decameter: 10m a kilometer: 1000m Go back to your original post and read what I wrote. Then redo your table.

*September 11, 2006*

**math**

4.2 cm=___m 0.042

*September 11, 2006*

**math**

how many millimeters are there in: a meter: a decaameter: a kilometer: alejandra don't you have some kind of chart to work from? There should be something in your text telling you how to change prefixes somewhere. thats the problem i don't have one and i need help ...

*September 11, 2006*

**math**

how many decimeters are there in: a meter: a decameter: a kilometer: 10 100 10000

*September 11, 2006*

**math**

how many centimeters are there in: a decimeter: a meter: a hectometer: 10 100 10000 10 100 10000

*September 11, 2006*

**science**

whats my height in meters? my height is 5'3" 63 inches x 2.54 cm/inch = 160.0 cm = 1.600 meters You learn to do these by dimensional analysis. We know there are 39.37 inches in 1 meter. First, convert your height to inches so we are dealing with one item instead of ...

*September 9, 2006*

**thx 4 the help roger**

thx 4 the help i got the steps You're welcome and I'm glad you understood the steps. Now use that strategy with your other word problems. Identify what the variable(s) are, convert them to equations, then solve the equations. Always be sure to test your answers to see ...

*September 9, 2006*

**algebra someone please help i cant get it**

he is missing 3 cents to buy an ice cream bar. she is missing 5 cents to buy the same ice cream bar. they combine their money but they are still 1 cent short. how much is the ice cream bar? Check your last post. Please don't double post.

*September 9, 2006*

**algebra**

he is missing 3 cents to buy an ice cream bar. she is missing 5 cents to buy the same ice cream bar. they combine their money but they are still 1 cent short. how much is the ice cream bar? Let x denote how much he has and y denote how much she has. Let p be the price of the ...

*September 9, 2006*

**making dot arrays**

I do tooo i don't know what List all of the numbers up to twenty that can be aranged into arrays with two rows??

*August 21, 2006*

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