Saturday
December 3, 2016

Posts by jerry

Total # Posts: 385

Stat & Prob.
Show that if Cov(X,Y)=0, then the correlation coefficient satisfies p(X+Y, X-Y)=Var(X)-Var(Y)/ Var(X)+Var (Y)
December 1, 2016

healthcare stats
You currently lease scanning equipment at a cost of $2,750 per quarter and two copy machines at $150 each per month plus $0.01 per page copied. You estimate you will copy a total of 30,000 pages a year per copier. What will you need to budget annually for this leased equipment?
November 8, 2016

Physics
Which are in static equilibrium? 1. A box sliding down a ramp. 2. A baseball after being hit. 3. A box sliding along a horizontal surface. 4. A perfectly upright freely spinning top 5. A freely swinging simple pendulum 6. A spinning astronaut floating out in deep space. 7. A ...
October 30, 2016

PHYSICS
a 75kg parent and a 22kg child meet at the center of an ice rink. they place their hands together and push hard enough to slide apart. a. is the force experienced by the child more than, less than, or the same force experienced by the parent? I said they experience the same ...
October 11, 2016

Algebra
Boris is driving to Memphis. Suppose that the distance to his destination (in miles) is a linear function of his total driving time (in minutes). Boris has 58 miles to his destination after 21 minutes of driving, and he has 42.6 miles to his destination after 43 minutes of ...
September 11, 2016

algebra
How would you enter the equation y + x2 = -1 into your calculator in order to graph it?
June 14, 2016

Math
What is 9 minus 3 decided by 1third plus 1 equals
May 21, 2016

Biology - Help!
Based on your knowledge of eukaryotic gene regulation, what series of events would explain the generation of the "pre-activated" state for the full set of B-globin like genes (epsilon, gamma, delta, and beta) in the earliest embryo?
May 9, 2016

chemistry
the density of an aqueous solution containing 10.0% by mass ethanol is 0.984 g/ml. calculate molality and molarity. what volume of the solution would contain 1.15 g ethanol ?
May 4, 2016

Algebra
.6351
March 30, 2016

math
Tim Tele received a $380 discount loan to purchase a DVD player. The loan was offered at 18% for 60 days. Find the interest in dollars and the proceeds for the following problem.
March 22, 2016

Physics
Car A travelling at 13 m/s [N] is 190m behind car B which is travelling at 9.0 m/s [N]. At this moment car A starts to accelerate at 6.0 m/s^2 [N] to catch up with car B. After 1.0s, car B also starts to accelerate at 2 m/s^2 [N]. How long will it take car A to catch up with ...
January 23, 2016

L/A
ok but ill never use jiskha again. :( thanks for nothing
January 12, 2016

L/A
These questions are from the book Rain Reign. Explain Rose's father's childhood. How might his childhood impact his relationship with Rose?
January 12, 2016

Language Arts
These questions are from the book Rain Reign. Explain Rose's father's childhood. How might his childhood impact his relationship with Rose?
January 12, 2016

Math
Sorry, I couldn't resist.
January 12, 2016

Math
TAnk you
January 12, 2016

math
3x^4-4/(x+2)^3
January 5, 2016

Biology
List down 20 acids with their property and identify them by saying polar or non polar and acidic charge or basic charge
January 5, 2016

Math
Each triangle is a 30-60-90 triangle, and the hypotenuse of one triangle is the longer leg of an adjacent triangle. The hypotenuse of the largest triangle is 8 centimeters. What is the number of centimeters in the length of the longer leg of the smallest triangle? Express your...
December 29, 2015

Algebra I
You have decided to try and convince your parents to let you get your own cell phone. After finding out that the flat monthly rate for unlimited minutes $35.00, which you can afford, you offer to pay the cost yourself. However, just before you place your order, you see an ...
December 13, 2015

Social Studies (Help!)
OH. So it was for more land and riches, not to avoid other groups.
December 7, 2015

Social Studies (Help!)
Could it also be because they wanted to avoid the English and Dutch colonies?
December 7, 2015

Social Studies (Help!)
I know, but what was their reason for going west. Remember that this takes place during the mid-1600's.
December 7, 2015

Social Studies (Help!)
Why did New France stretch so far to the west?
December 7, 2015

Social Studies (Help!)
Thank you!
December 1, 2015

Social Studies (Help!)
OHHHHHHH. Was it because they didn't want to get their colony taken over by the Spanish, so they kept their colony hidden for this reason?
December 1, 2015

Social Studies (Help!)
No
December 1, 2015

Social Studies (Help!)
Still don't see it
December 1, 2015

Social Studies (Help!)
So why did they want to hide their colony?
December 1, 2015

Social Studies (Help!)
The English settlement of Virginia, or the Jamestown colony. And during the early 1600s
December 1, 2015

Social Studies (Help!)
Why did the English want to hide their colony from Spaniards? Please help!!!!
December 1, 2015

Math
A flowerbed is 3 3/4 meters long and 2 meters wide. Uncle James wants to build a border around the flowerbed. The width of the border is 1/2 meter. The cost of building the border is $20 per square meter. How much does Uncle James have to pay to have the border built. 3.75+3....
November 16, 2015

Math
If it takes a old and hot tap 6 mins to fill a bath and on their own it takes the hot tap 100 secs more than the cold tap to fill bath. How long will it take the cold tap on its own to ill the bath
November 8, 2015

Math
Ten in each hundred 110 111 etc 210 211 etc 90
November 8, 2015

Chemistry
how much limestone would be required to change the ph value from 4 to 4.5 in 20000 cubic of water?
November 7, 2015

math
saac's law says, T(t) = Ta + (Ts - Ta)e^kt where Ta is the room temp Ts is the temp of the object and t is the time T(6) = 72 + (173-72)e^(6k) 137 = 72 + 101e^6k 101e^6k = 65 e^6k = 65/101 6k = ln(65/101) k = ln(65/101)/6 = -.073455541.. (put in calculator's memory) so...
October 24, 2015

Math
How many 5 foot tiles are needed to completely cover a 40 foot square wall?
October 19, 2015

Math
a shop has one pound bags of peanuts for $2.00 and three-pound bags of peanuts for $5.50 if you buy 5 bags and spend $17, how many of each size bad did you buy?
September 29, 2015

English
They sustained life threatening injuries in the forest fire, their names, ironically, are included on the list of suspected arsonist. How would you correct the sentence structure error? a. separate the two clauses with a colon b. join the two independent clauses with a ...
September 24, 2015

science
yes you are correct. the equation for photosynthesis: 6 CO(2) + 6 H(2)O + energy --> C(6)H(12)O(6) + 6 O(2) ^ the above equation basically says Carbon Dioxide + Water + energy ---yields---> glucose + oxygen the carbon dioxide gets reduced to glucose (gain H+ atoms) while...
September 24, 2015

science
true
September 24, 2015

Math
Consider a market where supply and demand are given by QXS = -14 + PX and QXd = 85 - 2PX. Suppose the government imposes a price floor of $38, and agrees to purchase any and all units consumers do not buy at the floor price of $38 per unit. a. Determine the cost to the ...
September 15, 2015

Algebra 2
I have to add this rational expression but I keep on ending up with 2 different answers each time I try to solve the expression. 2/x + 1/2x My answer is 4x+1/2x; but I also got 5/2x. Which one is correct and why?
September 12, 2015

Algebra 2
Someone please help me. Cycle Paths, Inc. makes bicycles, tricycles, and unicycles. Last week they made 88 more bicycles then unicycles, and five times as many tricycles as unicycles. If they made 40 more bicycles then tricycles, how many unicycles did they make?
August 23, 2015

physical sciences(chemistry)
Natasha holds the two ends of a string in her hands and then moves her hands up and down so that a wave travels from one end of the string to the other end. In which case will she have a standing wave along the string?
July 6, 2015

College Algebra
Two pipes can be used to fill a pool, working together the two pipes can fill the pool in six hours. The larger pipe can fill the pool in three hours less time than the smaller pipe can alone. Find the time to the nearest tenth of an hour it takes for the smaller pipe working ...
May 19, 2015

Philosphy - Dream Interpreations
Just any interpretation of what a venomous snake bite represents in a dream would be helpful. Thanks
April 29, 2015

Philosphy - Dream Interpreations
It may sound weird because its written in first person, but its an assignment. But thanks anyway
April 29, 2015

Philosphy - Dream Interpreations
I recently just had a dream when I was alone in my room enjoying myself and suddenly about 4-5 to what I perceived as venomous snakes, each with a vivid and distinct coloring design, appeared from the trashcan in the room and start slithering around. As I made feeble and ...
April 29, 2015

chemistry
How many moles are their in 10.6 L os SO2 ?
April 20, 2015

Physics
In the Daytona 500 auto race, a Ford Thunderbird and a Mercedes Benz are moving side by side down a straight-away at 67.5 m/s. The driver of the Thunderbird realizes he must make a pit stop, and he smoothly slows to a stop over a distance of 250 m. He spends 5.00 s in the pit ...
January 23, 2015

Life Span Development
According to Selman’s stages of friendship, stage 4 requires an individual’s increasing ability to balance
December 16, 2014

Math
(6/x^2+5x+6) + (9/x+3) express answer in reduced form What i attempted is to factor out the bottom half of the first fraction to 6/(x+2)(x+3) the second half i'm guessing would be to multiply each side by the x+3? making it a (6x+18/(x+2)(x+3)) + 9 or would i write it as 6...
December 8, 2014

Math
the series a_n doesn't have a limit. prove that the series (1/n) doesnt go to 1. use the definiton of lim: for every epsilon>0......
November 12, 2014

AP Calculus
Are infinite discontinuities removable? Also, please help me with this question: f(x)=x^2+4x+3 / x^2-9 has one removable discontinuity and one vertical asymptote. Find and identify the x-value for each. I found the asymptote at x=3, but please help for the discontinuity. Thanks!
October 28, 2014

Science--Help.
U got all the answers right
September 23, 2014

us history
how does American colonization effect the society of the united states
September 18, 2014

physics
Part 1/2 A cyclist maintains a constant velocity of 7 m/s headed away from point A. At the.aome.initial time, the cyclist is 240 m from the point A. What will be his displacement from starting point after 65 s ? Answer in units m Part 2/2 Qhat will be his position from point A...
September 13, 2014

physics
A blue ball is thrown upward with an initial speed of 22.8 m/s, from a height of 0.8 meters above the ground. 2.8 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 10.9 m/s from a height of 29.3 meters above the ground. The force of ...
September 8, 2014

FINANCE
how long would it take an investment to halve in value if it depreciates at a rate of 12,5% per annum on a straight line method?
September 3, 2014

Geometry
Thank you very much Steve.
June 11, 2014

Geometry
a four sided garden plot has an irregular shape. the second side is 12 feet longer than the first. the third side is 24 feet longer than the second. the fourth side is 36 feet longer than the third. if the perimeter of the plot measures 136 feet, what is the length of the ...
June 11, 2014

Math
Assume that it costs Apple approximately C(x) = 36,100 + 100x + 0.01x^2 dollars to manufacture x 30-gigabyte video iPods in a day. How many iPods should be manufactured in order to minimize average cost? What is the resulting average cost of an iPod? (Give your answer to the ...
June 4, 2014

Math
Wow thank you so much!!!!
June 4, 2014

Math
Solve the optimization problem. Minimize F = x^2 + y^2 with x + 2y = 15. Thank You for the help!!
June 4, 2014

Math - Business Calc.
Ahhh okay my bad. Thank you!!!
June 4, 2014

Math - Business Calc.
Damon, thank you! But i tried entering it in but it said it was wrong. Also it wants the answer in inches cubed (in^3)
June 4, 2014

Math - Business Calc.
Chocolate Box Company is going to make open-topped boxes out of 5 × 17-inch rectangles of cardboard by cutting squares out of the corners and folding up the sides. What is the largest volume box it can make this way? (Round your answer to the nearest tenth.) Thank You ...
June 4, 2014

math help plzzz!!!!!!!!!
-8<1-3(x-2)<13
May 28, 2014

math help plzzz
Solve the inequality then graph the solution set on real number line. (2/5x)>7 2(x+7)-4>5(x-3)
May 27, 2014

7th grade math
Solve the inequality then graph the solution set on real number line. (2/5x)>7 2(x+7)-4>5(x-3)
May 27, 2014

math
Jesse collected data on the colors of the coats his classmates wore one day in February. He started a circle graph. Which equation will give the angle measure of the section for black?
May 19, 2014

English
Bob what do you mean by Evolutionary mutation? Can you explain that a but more please.
May 6, 2014

English
Thanks a lot! my mind opened up more for this topic, i can see the light.
May 6, 2014

English
What is your opinion of the idea that the dangers we face may lie beyond our understanding? I just need some idea's, please help me out. I'm not that good at writing essays.
May 6, 2014

Algebra
Please help. f(x) -6x-1 and g(x)=4x^2 Select the solution for(f+g)(x). Thank you.
April 5, 2014

Please help!
Hi, I really need help with this one. Determine the equation of g(x) that results from translating the function f(x) = x^2 + 3 upward 12 units Thank you.
April 5, 2014

Algebra
Hello, This one as well. Thank you! Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -8x^2 + 3x + 9.
March 23, 2014

Algebra
Hello, I hope all is well. I am hoping you can help. Select the approximate values of x that are solutions to f(x) = 0, where f(x) = -7x^2 + 6x + 3.
March 23, 2014

Physics
A
February 27, 2014

math
Karen and Wayne need to buy a refrigerator because theirs just broke. Unfortunately, their savings account is depleted, and they will need to borrow money in order to buy a new one. Sears offers them an installment loan at 13% (add-on rate). If the refrigerator at Sears costs...
February 22, 2014

chemistry
was the formation of reactants or products favored by the addition of heat?
February 18, 2014

math
how do I multiply 53.33 100
January 28, 2014

stat
couple plans to have four children what is the probability that three are girls and one is a boy
January 26, 2014

math
elizabert has a box of shirts.1/2 of the shirts are small,2/5of the shirts are medium, and 5 shirts are large. how many shirts are in box?
January 23, 2014

Math
a man has a roll of 200m copper wire, he wires on room using 17m, and the next room using 83m of copper wire. How many meters is left on the roll after he does the two rooms?
January 10, 2014

math
is any multiple of 8 an even number or not
January 9, 2014

Computer Science
Given an undirected graph G = (V,E), does there exist a set D ⊆ V of size k such that every v ∈ V is either in D or adjacent to at least one member of D. Show that DS∈NPC. You may only assume that VC is known to be NP-Complete.
December 4, 2013

Grammar
1.C 2.O 3.C 4.C 5.C 6.C 7.O 8.C 9.O 10.C 11.C 12.C 13.C 14.C 15.C 16.O 17.C 18.C 19.C 20.C
November 11, 2013

Physics
Tom the cat is chasing Jerry the mouse across a table surface 2.4 m off the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 4.8 m/s. Where will Tom strike the floor? The acceleration of ...
November 10, 2013

Computer Science
Suppose X is a random variable and Y = aX + b is a linear function of X. Show that the correlation of X and Y is -1 if a < 0. cor(X,Y) = cov(X,V)/ sqrt(var(X)*var(Y))
October 28, 2013

Computer Science
Anyone?
October 25, 2013

Computer Science
cor(X,Y) = cov(X,V) / sqrt(var(X)* var(Y))
October 25, 2013

Computer Science
CORRECTION: Suppose X is a random variable and Y = aX + b is a linear function of X. Show that the correlation of X and Y is -1 if a < 0.
October 25, 2013

Computer Science
Suppose X is a random variable and Y = aX + b is a linear function of X. Show that the correlation of X and Y is 1 if a < 0.
October 25, 2013

Math
Fred decides that 12+40=62 is NOT a true equation.Is Fred correct?Explain.
October 2, 2013

5th grade math
if kelly gave 1/3 of a pizza to holly and 1/5 to diane how much did she have left?
September 30, 2013

Math
How would you use a number line to round 148 to the nearest ten.Explain.
September 29, 2013

Math
The base length, the screen height and the screen diagonal form a right-angle triangle. Therefore, you can use pythagorean theorem to calculate screen height: sqrt(40**2 - 32**2) = 24.0 Then surface is length by height: 32 * 24 = 768
September 28, 2013

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