Saturday
January 21, 2017

# Posts by Tanya

Total # Posts: 325

statistics
A maker of tires for cars has a multitude of data to support the fact that the lifetime of their tires follows a normal distribution with a mean of 42,100 miles and a standard deviation of 2,510 miles. Find the probability that a randomly selected tire will have a lifetime of ...
May 9, 2008

Algebra
Use the formula h= -16t^2+250t to model the height 'h' in feet of a model rocket 't' seconds after it has luanched. Determine when the rocket will reach a height of 900 feet.
April 15, 2008

Stat help
An article claimed that the typical supermarket trip takes a mean of 22 minutes. suppose that in an effort to test this claim, you select a sample of 50 shoppers at a local supermarket. the mean shopping time for the sample of 50 shoppers is 25.36 min. with a standard ...
April 3, 2008

Statistics...help
An article claimed that the typical supermarket trip takes a mean of 22 minutes. suppose that in an effort to test this claim, you select a sample of 50 shoppers at a local supermarket. the mean shopping time for the sample of 50 shoppers is 25.36 min. with a standard ...
April 3, 2008

i have no idea! The real estate assessor for a country government wants to study various characteristics of single family houses in the country. A random sample of 70 houses reveals the following: the mean is 1759, standard deviation is 380 and 42 houses have central air ...
April 3, 2008

religious studies
Who was Jesus'most beloved desciple?
February 15, 2008

Mathematics!
The answer is one yard behind the starting line. This is so because if Yolonda runs 10 miles per 10 seconds and Yoko runs 9 miles per 10 seconds that means Yoko will need Yolanda to be 1 yard backwards.
January 8, 2008

English
Where should quotation marks be place in the sentence below? Study your spelling, said Dad.
November 12, 2007

Managerial Economics/Math
a copy company expand production. Is 20 workers sharp copiers. Two months ago, firm added copiers, output increases 100,000 pages day. One month ago, added worker, productivity increased 50,000 pages da
October 3, 2007

14 line 10 syllable poem
Example of a ten syllable line I want a dinosaur for my birthday. now break the sentence apart to ten syllables. I want a di no saur for my birth day. 1 2 3 4 5 6 7 8 9 10
October 2, 2007

14 line 10 syllable poem
I think this might help. I had to do this in college. Think back when you learned syllables as a kid. You took a word and clapped you hand to each syllable to figure out how many were in each word. Ex. School. As you say it,the word does not have a break in it any where so it ...
October 2, 2007

how would you make a 4% percent paraformaldehyde solution? Work: starting from 20% (diluted with PBS) V1C1=V2C2 (100)(20)=(x)(4) x=500 so add 496 ml of PBS (accounting for 4% paraformaldehyde) or would you add 500ml of PBS Thank you
September 16, 2007

chemistry
how would you make a 4% percent paraformaldehyde solution? Work: starting from 20% (diluted with PBS) V1C1=V2C2 (100)(20)=(x)(4) x=500 so add 496 ml of PBS (accounting for 4% paraformaldehyde) or would you add 500ml of PBS Thank you
September 16, 2007

I need to do very good on this and i have to find 4 events before ferdands murder that led up/contributed to the start of world war 1. And i have to give specific examples. Please help me out!!!! It would mean so much
September 15, 2007

chemistry
Too make a 4% solution of paraformaldehyde from a 20 % solution. C1V1=C2V2 (20)(10ml)= (4)(x) x= 50ml so I would need to add 45ml of PBS and 4ml of the paraformaldhyde. Is that right.
September 9, 2007

chemistry
I wanted to double check how to go about creating a 1% solution and a 4% solution. I know that it is 1 part to 99 and 4 part to 96. so I add 1ml of solution and then water and the same for the four percent. I wanted to know if you also had any good site to understand making ...
September 6, 2007

dangling modifiers
If your baby does not like cold apple juice, it should be heated. That isn't really a dangling modifier because "it should be heated" comes directly after "juice." However, to make the sentence clearer, you could say, Apple juice should be heated if ...
July 13, 2007

spanish
What is the tourism like in El Salvador? Thank you for using the Jiskha Homework Help Forum. Here are some sites for you to visit: 1. http://www.lonelyplanet.com/worldguide/destinations/central-america/el-salvador 2. http://www.puntamango.com/tours_cultural.asp 4. http://www....
May 15, 2007

social studies
Can someone please help me with this question?: What is the United States doing to improve Iraq's infrastructure? Trying to pay citizens there to rebuild it as fast as some of the other citizens destroy it. Guess who is paying? So, the US is paying citizens of Iraq to ...
December 16, 2006

math
Find the zeroes of the function y=3x^3-3x So I factored that to y=3x(x^2-1) but am not sure about the zeroes. I know that 0 and 1 are zeroes, but am not sure how to get a zeroe from x^2. Thanks. Factor it again to get 3x (x+1)(x-1) The zeroes are where any factor is zero, ...
December 14, 2006

human physiology
Acetylcholine is known to increase the contractility of smooth muscle. And norepinephrine is known to decrease the contractility of smooth muscle. Oxytocin is a hormone that causes uterine contractions. Correct? I did an experiment with a lab rat. We removed the ovaries and ...
December 11, 2006

chem
why do good oxidizing agents easily reduce? Good (strong) oxidizing agents are easily reduced. What you said I think differs slightly from that. If they are strong oxidizing agents, they easily oxidize other ions and in doing so the oxidizing agent is reduced. If this isn'...
December 4, 2006

personal knowledge
I was just wondering if it would make any difference if one were to use calcium bromide solution instead of sodium bromide solution. It depends on what you are using if for.
December 3, 2006

English
I need help finding action-packed words... and several other things cause the mid-term marks are gonna be tomorrow so I gotta boost my mark up before I fail... Action-packed verbs are those that are very specific and vivid -- that is, they give the reader a "living" ...
November 8, 2006

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