Jacky
Most popular questions and responses by Jacky
Science
Which of the following is not an atom found in household bleach (Na0CL)? 1) Sodium (Na) 2) Chlorine (Cl) 3) Hydrogen (H) 4) Oxygen (O) My answer it's 4 correct me
asked on January 22, 2016 
Language Arts Checking answer
Identify the independent clause in the following sentence. Before electric lighting was invented, people used candles to light their homes at night. a. Before electric lighting was invented b. people used c. people used candles to light their homes at
asked on January 21, 2016 
algebra 1
Which of the following points are solutions to the system of inequalities shown below? Check all that apply. y>4x + 2 y
asked on January 5, 2015 
chemistry
A scuba diver takes a 2.3 L balloon from the surface, where the pressure is 0.90 atm and the temperature is 28 ∘C, to a depth of 20 m , where the pressure is 3.0 atm and the temperature is 15 ∘C. What is the volume of the balloon at this depth?
asked on April 17, 2019 
physics
The Earth’s radius is about 6380 km. The space shuttle is orbiting about 275.0 km above Earth’s surface. If the average speed of the space shuttle is 23500 km/h, find the time required for it to circle Earth.
asked on November 11, 2012 
geometry honors
Can you prove ABCD is a parallelogram based on the given information? Explain. Given: x = 5, y = 4 Prove: ABCD is a parallelogram. The image consists of a quadrilatera ABCD with their sides AB, BC, CD, DA as 3x + 12, 7y  8, 6x  3 and 5y respectively.
asked on January 8, 2015 
STAT
Suppose adults in a particular town drive a mean of 65 mph with a standard deviation of 15 mph. Using the normal curve table, a.What percentage of adults drive below 35 mph? b.What percentage of adults drive below 68 mph or above 85 mph? c.What percentage
asked on October 29, 2013 
STAT
The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. 1)How many students would you expect to have weight between 162 pounds and 178 pounds? 2)What is
asked on October 12, 2013 
Science
Which of the following is pure substance? Chocolates milk Orange juice Seawater Hydrogen peroxide I'm not sure what's the right answer!!
asked on January 22, 2016 
physics
A cart starts from position 4 (which is 20m above ground) in the figure below with a velocity of 11 m/s to the left. Find the speed with which the cart reaches positions 1, 2, and 3. Neglect friction. speed at position 1 m/s? speed at position 2 m/s? speed
asked on February 27, 2012 
math algebra
Gray Glaze requires 15 hours to put a new roof on a house. His apprentice, Anna Gandy, can record the house by herself in 20 hours. After working alone on a roof for 6 hours, Gary leaves for another job. Anna takes over and completes the job. How long does
asked on November 19, 2016 
chem
What volumes of 0.53 M HNO2 and 0.46 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.55? HNO2
asked on March 14, 2010 
Math (Assignment due today)
Assume 11 males audition, one of them being Winston, 4 females audition, one of them being Jackie, and 5 children audition. The casting director has 3 male roles available, 1 female role available, and 2 child roles available. (1)How many different ways
asked on June 28, 2016 
STAT
Assume that women’s heights are normally distributed with a mean given by µ = 64.6 inches and standard deviation given by σ = 2.2 inches. What area under the normal curve corresponds to the probability that a woman’s height is between 63.7 inches and
asked on October 12, 2013 
english
In this discussion, you will post issues related to motivation and learning. Refer to the texts in this section, other texts you have read, and your personal experience and knowledge to support your ideas. Begin your discussion by addressing the following
asked on January 29, 2015 
!!MATH!!
A decroative floor pattern has one red square tile surrounded by 12 blue tiles. Write and evaluate an expression to show how many total tiles (red and blue) are needed if there are 15 red tiles. Then make a table showing the total number of tiles if there
asked on September 30, 2011 
STAT
The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. How many students would you expect to have weight between 162 pounds and 178 pounds? What is the
asked on October 12, 2013 
Science
Explain why pentane has a significantly higher vapor pressure than 1butanol?
asked on January 30, 2014 
Math, calculus III
A particle moves along the path from the origin to (0, 2, 1) to (1, 2, 1) to (1, 0, 0) and back to the origin under the influence of the force field F = z2i + 2xyj+ 4y2k. Calculate the work done by direct calculation and by using Stokes’ Theorem
asked on September 18, 2017 
chemistry
how many moles of acid must be added to the blood to bring the carbonic acid/hydrogen carbonate ratio from 1:2 to 1:10?
asked on April 19, 2010 
Chemistry
Need Help On This Question.! Potassium chloride reacts with bromine forming potassium bromide plus chlorine. If 500g of potassium bromide are produced, how many grams of potassium chloride reacted?
asked on December 4, 2010 
Physics
A bicyclist is riding at a tangential speed of 13.9 m/s around a circular track with a radius of 38.4 m. If the magnitude of the force that maintains the bike’s circular motion is 378 N, what is the combined mass of the bicycle and rider? Answer in units
asked on January 29, 2013 
STAT
The weights of the 100 students in an introductory statistics class are normally distributed, with a mean of 170 pounds and a standard deviation of 5 pounds. How many students would you expect to have weight between 162 pounds and 178 pounds?
asked on October 12, 2013 
physics
A roller coaster has a loop the loop with a loop radius of 14.5 m. What is the minimum speed that the cart must have so that unconstrained riders do not fall out when the cart is upside down at the top of the loop? What condition on the riders is met at
asked on November 9, 2011 
math help & correction
Problem #1 Is this correct or wrong? Find the slope of the line passing through the points(1, 1)and(1, 2). Write the equation of the line. For this one I KEEP GETTING Y=  (3)/(2)x2.5 Problem #2 Find the yintecept and slope of 7x+9y=72 My answer:
asked on March 31, 2007 
Physics
Find the magnitude of the gravitational force a 65.4 kg person would experience while standing on the surface of Earth with a mass of 5.98 × 1024 kg and a radius of 6.37 × 106 m. The universal gravitational constant is 6.673 × 10−11 N · m2/kg2.
asked on January 29, 2013 
PHYSICSS!!!!!
At t = 0, a particle moving in the xy plane with constant acceleration has a velocity of vi = (3.00 i  2.00 j) m/s and is at the origin. At t = 2.00 s, the particle's velocity is v = (6.60 i + 4.00 j) m/s. Find the acceleration of the particle at any time
asked on November 4, 2008 
Science
Predict change in temperature for 1butanol, CHSCH2CH2CH2OH, if same experiment were using 1butanol?
asked on January 30, 2014 
STAT
Given a sample size of 18, with sample mean 660.3 and sample standard deviation 95.9, we are to perform the following hypothesis testing: Null Hypothesis H0 : µ = 700 Research Hypothesis H1 : µ ≠ 700 •What is the test statistics? •At a 0.05
asked on October 13, 2013 
senn high school
Write a 12 paragraph on a topic of your choice using at least 3 of the figurative language we have reviewed so far.After your paragraph ,list the types of figurative language you used ?
asked on July 4, 2012 
senn high school
Please wite a paragraph (5sentences)to show you comprehend what analogies and idioms are.Use at least one analogy and one idiom in the paragraph?
asked on June 29, 2012 
math
the serface of our earth is 20'c for every km, k below the surface the tempature increses by 10'c. let t represent the tempature in 'c 1a write an equation that represent the relationship between disatnce k and t tempature 1b. what is the slope and and
asked on October 17, 2009 
chemistry
Why can't lead chloride be directly prepared by adding hydrochloric acid?
asked on July 15, 2015 
STAT
A researcher is examining the relationship between color preference and gender. A sample of 30 men and 30 women is obtained and each person is asked to identify his/her preference between two choices of paint colors for a new student lunge. For this
asked on October 12, 2013 
economic
explain the importance of the following terms in the u.s. free enterprise systerm;(A) profit motive, (B) voluntary extange, (C) private property rights, and (D) compition
asked on September 24, 2012 
chemistry
You have a sample of magnesium chloride. If there are 3.90 mol of Cl, how many moles of magnesium atoms are there?
asked on February 28, 2010 
unscrambling a French word associated with art
unscramble tertcueas (it's in french and the beginning is les...) This might work: http://www.ssynth.co.uk/~gay/anagram.html Be sure to click the circle by "French," and be sure to uncheck the box before "Include singlecharacter words (a and I)"  !! =)
asked on February 8, 2007 
Math, calculus III
A fluid has constant density ρ and velocity v = zi + (y2 + 2y)j − 2xk. (a) Calculate the particle paths (fieldlines). (b) Calculate the mass flux through the boundary of the region x2 + y2 ≤ 4 and 0 ≤ z ≤ (4−y) by direct calculation and by
asked on September 18, 2017 
math
We did not find results for: a conical tank with its vertex down is 12 feet high and 12 feet in diameter at the top. water is being pumped in at the rate of 8 feet cubed per minute. find the rate at which the water level is rising when the water is 4 feet
asked on November 12, 2014 
Physics
The mass of a certain neutron star is 1 × 1031 kg (5 solar masses) and its radius is 5500 m. What is the acceleration of gravity at the surface of this condensed, burnedout star? The value of the universal gravitational con stant is 6.67 × 10−11 N ·
asked on January 29, 2013 
phsyics
A brick of mass 1.5 kg slides down an icy roof inclined at 30.0° with respect to the horizontal. (a) If the brick starts from rest, how fast is it moving when it reaches the edge of the roof 1.75 m away? Ignore friction. m/s ? (b) Redo part (a) if the
asked on February 27, 2012 
9th grade (math)
im learnin about y=mx+b 1.describe the line you think each equation represent Y=x, y=5, x=3 2. The equation of a line is y=mx+2. determione the value of m when the line passes through each point D(12.5) s(1.3) e(2.6) a(5.1)
asked on October 17, 2009 
engineering
In a Direct Shear Test please help. 1)How do we determine the spacing between the two parts of shear box? What would happen if it is not set properly? 2) The shear and normal stress can be calculated with the corrected area considering the movement of
asked on December 1, 2013 
9th grade (math)
pennies are kept in a jar the mass of the jar is 20 g the mass of each panny is 5g le t the varible p represent the total mass of pennis and the jar. let the variable n represent the number og pennys. 1a. write an equation that represent the relation ship
asked on October 17, 2009 
9th grade (math)
the surface of our earth is 20'c for every km, k below the surface the tempature increses by 10'c. let t represent the tempature in 'c 1a write an equation that represent the relationship between disatnce k and t tempature 1b. what is the slope and and
asked on October 17, 2009 
math,algebra
can someone help me i've tried different numbers but i can come out to factor this: 2b^2+6b216=0 why don't you divide the equation by 2 to get b^2+3b108=0 now by trial and error, can you find two factors of 108 that have a difference of 3? (b9)(2b+24)
asked on March 26, 2007 
math,help
Can someone help me understand the following in terms that i can understand because i've read the book,definitions i've done research and i am new with this and i still don't understand.The teacher is hopeless at explaining that's why i am here for help.
asked on March 21, 2007 
STAT
The score on a test are normally distributed with a mean of 75 and a standard deviation of 6. If the professor wishes to give A’s to the top 4%, what would be the cutoff score be for A’s?
asked on October 12, 2013 
STAT
Given a sample size of 18, with sample mean 660.3 and sample standard deviation 95.9, we are to perform the following hypothesis testing: Null Hypothesis H0 : µ = 700 Research Hypothesis H1 : µ ≠ 700 •What is the test statistics? •At a 0.05
asked on October 12, 2013 
Physics
A ball is thrown vertically upward with a speed of 26.1 m/s from a height of 2.1 m.How long does it take to reach its highest point? The acceleration of gravity is 9.81 m/s2. Answer in units of s
asked on November 11, 2012 
Physics
Sally travels by car from one city to another. She drives for 36.5 min at 90.7 km/h, 13.3 min at 120 km/h, and 57.4 min at 45.6 km/h, and she spends 16.3 min eating lunch and buying gas. Find the total distance traveled. Answer in units of km
asked on November 11, 2012 
finance
indexing exemption for inflation. each year, the internal revenue service adjusts the value of an exemption based on inflation ( and rounded to the nearest $50.00). in a recent year, if the exemption was worth 3,100 and inflation was 4.7 percent, what
asked on May 1, 2012 
government
Which statement about the senate is true?
asked on March 31, 2010 
business
Mr. S, a dealer of musical instruments, persuades me to buy an electronic organ, orally promissing that I can return the organ if I cannot learn how to play it. I signs a standard written form contract, which does not include this provision. I will not be
asked on April 18, 2008 
Electrons circuits
Hi everyone! I'm new in here. Recently I bought a movement monitor which detects micro movement. If the sensor does not detect a movement in 20 seconds, the buildin speaker will beep until the sensor detects a movement. I'm using it for my project and I
asked on April 4, 2008 
Social groups
How do virtual groups differ from in person primary and secondary groups? What qualities do virtual and inperson groups share? I understand people join primary groups to satisfy their personal needs of belonging and fulfillment. Could the differences
asked on September 20, 2016 
Science
Does ΔT from evaportation increase or decrease with increasing molecular mass? Explain why?
asked on January 30, 2014 
Science
Using concept of Surface Tension, explain why does the detergent cause the effect observed?
asked on January 30, 2014 
STAT
The Cox family has 4 boys. •What is the probability of a 4child family having 4 boys? •What is the probability that the next child of the Cox family will be a boy, given that they have already 4 boys in a row?
asked on October 12, 2013 
STAT
A certain personality index postulated by Professor Bailey is normally distributed, with a mean of 0.4 and a variance of 0.0004. What is the probability that the Professor Bailey’s personality index of a randomly selected person will exceed 0.44?
asked on October 12, 2013 
STAT
Lucinda used ANOVA to test if there were statistically significant differences between the five conditions of her independent variable. There were 8 participants in each condition. Her obtained Ftest (df between = 4, df within = 30) was F = 10.897/3.72 =
asked on October 12, 2013 
math
standard form numbers are used around the world for....... 1:speed of light i need 3 more situations when you use standard form
asked on January 19, 2012 
algebra
the perimeter P of a square is four times the length of ones side s, or P=4s. Is (1455) a solution of this equation? If not, find a solution that uses one of the given values
asked on November 1, 2011 
math
6x (squared) = 23x+18 help please
asked on May 18, 2010 
high school math
what is (1+2y)(3+5y)
asked on October 31, 2009 
math, basic
how do you write 5 and a half in a fraction not like this because i thought it was 5 1/2 but it was wrong. 5 1/2 is also 11/2, which is considered an improper fraction. I hope this is what you were asking.
asked on April 9, 2007 
math,help
I definately do not understand this problem. If y varies directly with x, and y = 600 when x = 1000, find the constant of variation K. If y is directonally (proportional) to x, then for every value of x there is a value for y multiplied by a constant
asked on March 31, 2007 
math,help
What is the equation i have to use for the following question A roof rises 9.75 ft over a horizontal distance of 15.84ft. What is the slope of the roof to the nearest hundredth? Slope is given by slope=rise/run So what is the rise and what is the run?
asked on March 31, 2007 
Unscrambling
reatstuec in French (begins with les) Thank you for using the Jiskha Homework Help Forum. Sorry but it's too late this evening for me to even think. Usually an exercise like this would use the vocabulary you have been studying. Without knowing your
asked on February 8, 2007 
lauguage arts
what do rats do I need help fast. It looks as if what you need to do is learn how to conduct thorough and effective searches for yourself. That's what research is, and I'm sure that's what your teacher expects you to do  conduct research.
asked on September 14, 2006

physics
I think it's not a true answer😣😣
posted on July 4, 2019 
more physics
IF AN OBJECTS IS OBSEVED TO ACCELERATE
posted on May 2, 2018 
3rd grade math
How to do a standard form?
posted on September 11, 2017 
physics
oitt buat itaaleem kerrrr???
posted on February 20, 2017 
Ap Chemistry
E = hc/λ where h = 6.626 E 34 Js +2.914*10^(18) J = [6.626*10^(34) Js (3*10^8) m/s] / λ so do some mathematical manipulation and isolate λ to get: λ = [6.626*10^(34) Js (3*10^8) m/s] / +2.914*10^(18) J & you can use a calculator to get the final
posted on January 19, 2017 
life orientation
identify 3 human rights violations
posted on April 20, 2016 
chemistry
Why can't lead chloride be directly prepared by adding hydrochloric acid to lead(ous) oxide?
posted on July 15, 2015 
english
Ms. Sue
posted on January 29, 2015 
english
im stuck with what to write, please help me! thanks
posted on January 29, 2015 
world history
was antonio da sangallo poor or wealthy
posted on October 14, 2014 
Problem solving
l pay 900.00 rent for 31 days, l moved in on 13 of august and moving out on 4;th september. how much would l get for 9 days from my landlord. thanks jacky.
posted on August 18, 2014 
STAT
Thanks, Jacky
posted on October 20, 2013 
STAT
Thanks that help a lot. Jacky
posted on October 20, 2013 
STAT
Thanks Reiny. That really help.
posted on October 13, 2013 
Life orientation
Department of environmental affairs
posted on May 7, 2012 
physics
Thank you so much! :)
posted on February 28, 2012 
math
OMG I STILL DON'T UNDERSTAND THT! i have to know how to do it
posted on September 30, 2011 
Pre Calc
Solve for x: 4x+62x1
posted on September 1, 2010 
Calculus (Answer Check)
P1=(3,2);P2=(6,2)
posted on July 21, 2010 
Electrons circuits
I am sorry for my unclear explanation. Actually the monitor is powered by a 9V 100mA adaptor. I am not sure if the voltage drop across the speaker is AC or DC because the voltage keep changing from 0.9V to 1.5V on my voltmeter. Current is around 3.8mA. The
posted on April 5, 2008