alejandra
Popular questions and responses by alejandra
statistics
The caffeine content of a cup of homebrewed 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 homebrewed coffee will have more than 130 mg
asked on October 24, 2010 
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?
asked on December 15, 2011 
5TH GRADE
ALGEBRA. EQUATIONS FIND N. 3,7,14,15,17,46,N RANGE:43 MODE:N MEDIAN:15 MEAN:N
asked on September 30, 2008 
anyone plz check if its right
(4q+2)(2q3) if i simplify it will it be 2q+5? correct You can drop the parentheses and rearrange the terms to get (4q+2)(2q3)=4q2q + 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!
asked on September 13, 2006 
Math
How can you use an array to find partial products for 4 times 36
asked on January 13, 2020 
Chemistry
How many grams of bromine are required to react completely with 37.4 grams aluminum chloride?
asked on March 21, 2013 
us history
Why did railroads and the telegraph expand together?
asked on November 26, 2011 
math (comparing ratios)
the question says →4 feet to 4 inches and i have to do it in simplest form
asked on February 1, 2011 
chemistry
the number of protons in the nucleus of an atom is called the.... atomic number
asked on February 13, 2007 
physics
explain how you can change the length of a vibrating string.
asked on October 30, 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
asked on September 28, 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.
asked on 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
asked on September 9, 2006 
world history
identify the economic role of the groups identify the groups place in the social hierarchy describe challenges faced by the members in the group describe the potential benefits of belonging to that group the groups are: serfs, nobles, clergy,
asked on January 2, 2019 
Math
How many buses with the school need if only 40 students can ride on each bus
asked on August 29, 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 ?
asked on 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,
asked on 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,
asked on 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
asked on 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
asked on 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
asked on September 7, 2014 
Chemistry
How many grams of bromine are required to react completely with 3704 grams aluminum chloride?
asked on March 21, 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?
asked on 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
asked on November 27, 2012 
social studies
list examples of sumerian literature
asked on September 6, 2012 
us history
How important are Edison's inventions in American life today?
asked on November 26, 2011 
geometry
given triangle ABC is congruent to triangle PQR, AB = 38 .QR = 28 and PQ = 5x+8 . find x value
asked on 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?
asked on 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
asked on September 24, 2011 
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
asked on November 28, 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.
asked on 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(101x3)
asked on 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
asked on October 2, 2010 
changes in matter
What happens whensodium chloride and silver nitrate react in a replacement reaction?
asked on March 1, 2009 
math
Does anyone know how to clear the table on a TI84 graphic calculator?
asked on February 28, 2008 
math
lcm is hard for me can you give all the anwers to my homework please
asked on 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
asked on 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
asked on December 7, 2006 
physics
what are the 4 main kinds of longdistance communication? I have no idea what you mean here, in physics. Can you explain?
asked on 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
asked on 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)?
asked on 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
asked on 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
asked on 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.
asked on October 30, 2006 
MATH
i need help filling this out! 4x10=323x 4x10+____=323x+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
asked on 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
asked on 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.
asked on 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
asked on October 12, 2006 
science plz help
do earthquakes correlate with identified large faults? do earthquakes occur in areas without identified large faults? Yes.
asked on 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
asked on 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
asked on 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
asked on 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
asked on 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
asked on 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
asked on 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?
asked on 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
asked on 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
asked on 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 reread DrBob222's post. It
asked on 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.
asked on September 11, 2006 
math
4.2 cm=___m 0.042
asked on 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
asked on September 11, 2006 
math
how many decimeters are there in: a meter: a decameter: a kilometer: 10 100 10000
asked on September 11, 2006 
math
how many centimeters are there in: a decimeter: a meter: a hectometer: 10 100 10000 10 100 10000
asked on 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
asked on 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
asked on September 9, 2006

History
This is late but in case anyone needs the answer I think it’s D
posted on September 3, 2019 
World history
What conditions fostered the rise of absolute monarchs in Europe?
posted on August 21, 2019 
Algebra
I know this is probably old but Incase anybody needs the answer it’s 2^4x
posted on May 31, 2019 
science help.. pls help me dr.bob22 or damon
It is JJ THOMPSON
posted on February 11, 2019 
world history
i tried getting answers from my book but i wasnt able to get any BECAUSE I DONT UNDERSTAND ANYTHING im so lost, this is about "medieval christian europe" if thats any help lol
posted on January 2, 2019 
Math
its yes you just simplify it and both come out with 1/4
posted on November 30, 2017 
PreAlgebra
what type of association would you expect betwee a persons age hair length?
posted on September 20, 2016 
Math
5 units
posted on September 8, 2016 
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
posted on October 9, 2014 
4th grade
24
posted on November 8, 2012 
math
84
posted on February 9, 2012 
math
12
posted on February 9, 2012 
geometry
18 is the answer
posted on November 1, 2011 
math
they burried him six feet down and eight feet up
posted on October 20, 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
posted on October 6, 2011 
science
whats a meteorite?
posted on March 1, 2011 
Algebra
I do not Know
posted on February 1, 2011 
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??
posted on August 25, 2010 
Literature
answer to # 3 is novel
posted on November 17, 2009 
Spanish
SON LA ONCE Y MEDIA DE LA MANANA.
posted on September 30, 2008 
Sapnish 2
SON
posted on September 30, 2008 
Spanish
THE MEANING OF ACTRIZ IS TO ACT.
posted on September 30, 2008 
5th grade math
EQUATION FIND N. 3,7,14,15,17,46,N RANGE:43 MODE:N MEDIAN:15 MEAN:N
posted on September 30, 2008