# chris

Newest questions and responses by chris-
## probability

As in an earlier exercise, busy people leave the park according to a Poisson process with rate λ1=3/hour. Relaxed people leave the park according to an independent Poisson process with rate λ2=2/hour. Each person, upon leaving the park, makes a decision

*asked on November 27, 2018* -
## probability

When you enter the bank, you find that there are only two tellers, both busy serving other customers, and that there are no other customers in queue. Assume that the service times for you and for each of the customers being served are independent

*asked on November 27, 2018* -
## probability

Consider three lightbulbs each of which has a lifetime that is an independent exponential random variable with parameter λ=1. The variance of the time until all three burn out is: = Recall that the variance of an exponential with parameter λ is 1/λ2.

*asked on November 27, 2018* -
## math

Add the following vectors using the Component law. a. 9 m/s [N30°E] and 2 m/s [N 60°E]. b. 3 N in a direction 15° south of west and 4 N in a direction 12° east of south.

*asked on November 13, 2018* -
## Math

The vertices of a sandbox are P(12, 14), Q(12, 17), R(16,17), and S(16,14). The coordinates are measured in feet. What is the perimeter of the sandbox?

*asked on October 23, 2018* -
## Thesis topic

Hi what are the research gaps if i am goign to make an undergraduate thesis about children in conflict with the law? pls help

*asked on September 22, 2018* -
## Physics

a ball is released from the top of a 67.0 m high building. At the same instant a second ball is shot straight up from the ground with an initial speed of 20.0 m/s, directly below the point where the first ball was dropped. Ignore air drag and calculate a.

*asked on August 13, 2018* -
## Physics

Earth is a spherical body, of radius 6,376 km, which completes a full rotation about its axis in 24.0 h. how long (in hours) should the day on Earth be so that a person at the equator is able to float freely above the ground?

*asked on August 13, 2018* -
## Physics

A square plate has a side length of 1.20 m. A 24.0-N ~ m torque is applied about an axis perpendicular to the plate through its center. If it experiences an angular acceleration of 6.25 rad/s2, calculate the mass of the plate.

*asked on August 13, 2018* -
## Physics

A firecracker travels straight up at 75.0 m/s and explodes into two pieces. The smaller piece carries one third of the firecracker’s mass and shoots off horizontally at 48.0 m/s west. Determine the speed and direction of the other piece directly after

*asked on August 13, 2018* -
## Probability

Assume you take the bus to campus. About every 5 times (1 in 5) you take the bus in the morning it is full when it comes to your stop and it takes no more passengers. This means that you have to wait for the next available bus. To your surprise, 3 days in

*asked on August 12, 2018* -
## Math

I'm looking for a example for 1 to 2 ratio sentence

*asked on August 8, 2018* -
## Check my calc please

Use the graph of f(t) = 2t + 2 on the interval [-1, 4] to write the function F(x), where f(x) = x∫-1 f(t) dt a. F(x) = x^2 + 3x b. F(x) = x^2 + 2x - 12 (my answer) c. F(x) = x^2 + 2x - 3 d. F(x) = x^2 + 4x - 8

*asked on July 2, 2018* -
## Calculus check

Help me check my calculus 1. The graph of f '(x) is continuous, positive, and has a relative maximum at x = 0. Which of the following statements must be true? a. The graph of f is always concave down. b.The graph of f is always increasing. c. The graph of

*asked on July 2, 2018* -
## Calculus

Can someone help me check my answers 1. Find the range of the function f(x) = x∫-6 √36-t^2 dt - [-6, 0] - [0, 6] - [0, 9π] (my answer) - [0, 18π] 2. Use the graph of f(t) = 2t + 2 on the interval [-1, 4] to write the function F(x), where f(x) =

*asked on July 2, 2018* -
## Calculus

The differential equation dy/dx = (y-2)/(y-1) I.produces a slope field with horizontal tangents at y = 2 II.produces a slope field with vertical tangents at y = -1 III.produces a slope field with columns of parallel segments A. I only B. II only C. I and

*asked on July 2, 2018* -
## Social Studies

What Washington industries have experienced the most growth in recent decades because of technological innovation? Select all that apply. (4 po coal mining video games computer software fish hatcheries food canning genetic engineering grape farming lumber

*asked on June 7, 2018* -
## chem

A student uses (2.1000x10^-1) grams of oxalic acid dihydrate. Her titration required (2.63x10^1) mL of NaOH to reach the endpoint. What is the M of her NaOH solution. Put in scientific notation w/ 3 sig figs. How would you do this through dimensional

*asked on June 7, 2018* -
## Parametrics

A bowling ball is rolled down and alley with a constant velocity of 1.4m/sec. at an angle of 86deg. To the starting line. The position of the person throwing the bowling ball can be represented by the point (0,0). Where is the ball after 8 seconds?

*asked on May 16, 2018* -
## Math

A passbook savings account has a rate of 8%. Find the effective annual yield if the interest is compounded quarterly.

*asked on May 14, 2018* -
## Math

Kim and Mario wish to have $30,000 available for a kitchen remodel in 3 years. How much money should they set aside now at 7% compounded monthly in order to reach their financial goal? Round your answer UP to the nearest cent.

*asked on May 14, 2018* -
## math

Linda had started with 1 yard of fabric and used 5/8, how much fabric would be left

*asked on May 9, 2018* -
## Learning another language

Whats a good site to learn German? if anyone could help thanks

*asked on May 1, 2018* -
## American Goverment

.Use of the Internet for grassroots organizing, political commentary, and fund-raising has become a standard due to developments in the __________ presidential campaigns. a.1996 b..2000 c.2004 d.2008 C. 2004?

*asked on April 25, 2018* -
## American Goverment

In the pluralist model, bargaining among groups is carried on by: a.one leader. b.few leaders. c.many leaders. d.voting. D

*asked on April 25, 2018* -
## Math

Geometric And Arithmetic Sequences a store manager plans to offer discounts on some sweater acording to this sequence: $48, $36, $27, $20.255,... What would be the price of a sweater after 8 discounts? Is this an arithmetic or geometric sequence?

*asked on April 23, 2018* -
## Physics

In Pittsburgh, children bring their old jack-o-lanterns to the top of the Carnegie Science Center for the annual Pumpkin Smash and compete for accuracy in hitting a target on the ground. Suppose that the building is 23m high and that the bulls-eye is a

*asked on April 11, 2018* -
## Physics

Can I get help with these questions? The beautiful Multnomah Falls in Oregon are approximately 206m high. If the Columbia river is flowing horizontally at 2.90m/s just before going over the falls, what is the overall velocity of the water when it hits the

*asked on April 11, 2018* -
## English

Write a sentence using the word: programme to show the meaning.

*asked on March 24, 2018* -
## englies

Using a “Cuase-and-Effect Chain” explain why leaves change color and fall from the tree. Used details from the story.

*asked on January 29, 2018* -
## Physics

When sugar is poured from the box into a bowl , the rubbing of the sugar grains create a static charge that repels the grains , and causes the sugar to go flying out in all directions. If each of two grains acquires a charge of 3.0x10^-11 C at a separation

*asked on January 26, 2018* -
## Math

One day 176 people visited small art museum. The ratio of members to nonmembers that date was 5 to 11. How many people who visited the museum that day were nonmembers ?

*asked on January 5, 2018* -
## HS english 1

Please help i have tried a lot of other sites and they couldnt help me. Question (essay style): Read this excerpt from Little Brother and answer the following questions in complete sentences using proper grammar and punctuation: Marcus manages to flag down

*asked on November 20, 2017* -
## Chemistry

Ca+N-->Ca3N2 -What is limiting reagent? -Mass of calcium nitride formed when 50.0g of calcium reacts with 50.0g of Nitrogen? -Excess? CAN SOMEONE DOUBLE CHECK MY ANSWERS: Calcium is limiting reagent. Mass of Ca3N2: 68.4g Ca3N2 Excess: 38.4N left over.

*asked on November 17, 2017* -
## math

a recent survey of 8 randomly selected social networking sites has a mean of 13.1 million visitors for a specific month. the standard deviation is 4.1 million find the confidence interval of the true mean

*asked on November 13, 2017* -
## Chemistry

H2SO4+2NaOH->2H2O+Na2SO4 How many molecules of water are produced when 12g of sodium sulfate are created? Is this answer correct: 75Lx6.02^23= 452molecules H2O

*asked on November 11, 2017* -
## Chemistry

H2SO4+2NaOH->2H2O+Na2SO4 1.) How many grams of H2SO4 are needed to produce 135L of water? 2.) How many molecules of water are produced when 12g of sodium sulfate are created?

*asked on November 11, 2017* -
## Language arts

I need help on researching hurricanes can you help me thanks.

*asked on November 4, 2017* -
## Science

i need help i need to find 3 ways to conserve fish

*asked on November 1, 2017* -
## MATLAB

Consider the following approximation: f′(x) ≈ Af(x − 2h) + B f(x − h) + C f(x) + D f(x + h) + E f(x + 2h). 1) Determine the values of the constants A, B, C, D, and E so that the approximation is as accurate as possible. What is the order of the

*asked on October 15, 2017* -
## Physics

A rail gun uses electromagnetic energy to accelerate objects quickly over a short distance. In an experiment, a 2.00 kg projectile remains on the rails of the gun for only 3.500e-2 s, but in that time it goes from rest to a velocity of 4.00×103 m/s. What

*asked on October 2, 2017* -
## Algebra

What do A & B stand for in algebra can some one please explain this to me because I'm really confused:/

*asked on September 29, 2017* -
## Science

What is the goal of technology A.to understand the natural world B.to improve how devices operate C.to improve how people live D.to understand how systems operate My answer A

*asked on September 14, 2017* -
## Math

Consider the two savings plans below. Compare the balances in each plan after 7 years. Which person deposited more money in the plan? Which of the two investment strategies is better? Yolanda deposits $550 per month in an account with an APR of

*asked on August 17, 2017* -
## Math

At age 25 someone sets up an IRA (individual retirement account) with an APR of 4%. At the end of each month he deposits $85 in the account. How much will the IRA contain when he retires at age 65? Compare that amount to the total deposits made

*asked on August 16, 2017* -
## Math

Find the savings plan balance after 2 years with an APR of 9% and monthly payments of $250 Can someone help me? Idk if im right but do I multiply $250 by 9% an then divide?

*asked on August 12, 2017* -
## Math

Suppose a man is 30years old and would like to retire at age 65 Furthermore, he would like to have a retirement fund from which he can draw an income of $50,000 per yearlong dash—forever! How can he do it? Assume a constant APR of 5%. He

*asked on August 10, 2017* -
## Math

Consider the two savings plans below. Compare the balances in each plan after 7 years. Which person deposited more money in the plan? Which of the two investment strategies is better? Yolanda deposits $550 per month in an account with an APR of

*asked on August 10, 2017* -
## Math

Find the savings plan balance after 33 years with an APR of 9% and monthly payments of $200

*asked on August 8, 2017* -
## Math

Sal and Cal both work for the same company making $55,000 each in annual salary. Sal deposits 5% of her salary to her 401k plan and the company matches 25 cents for each dollar contributed to the 401k up to the 5%. Cal deposits nothing into his

*asked on August 8, 2017* -
## math

Suppose that $4,000 is invested in a 6-month CD with an APY of 1.6 What is the corresponding APR?

*asked on August 5, 2017* -
## American History

How were American politics and society shaped by the Cold War?

*asked on July 27, 2017* -
## Life orientation

Impact of risk behaviour. Social and emotional

*asked on July 21, 2017* -
## American History

How does Goldwater's conservative vision for America compare to Johnson's "Great Society"?

*asked on July 18, 2017* -
## American History

What were some of the social and political changes of the 1960s?

*asked on July 18, 2017* -
## Religious Studies

Was Jesus trans?

*asked on June 28, 2017* -
## Math

i am a 6 digit number 8 ones, 5 hundreds 2 thousands, 19 ten thousands. What is the answer?

*asked on June 27, 2017* -
## Math

Teach me the method for this question: if a car travels 180km on 18 litres of petrol, then on a full 40litre - tank it should travel.

*asked on June 18, 2017* -
## Math(Calculus)

Im having a real difficult time solving this question. Find the absolute extrema of the function. h(x) = e^x^(2) - 4 on [-2,2] Absolute maximum value: at x = Absolute minimum value: at x =

*asked on April 26, 2017* -
## physics

An electron is located at the origin. A proton is located at (2, 0). Find the electric field direction at (1, 1).

*asked on April 14, 2017* -
## History

How has the united states used economic pressure to promote the spread of democracy

*asked on April 12, 2017* -
## math

NEED HELP NOW TALKING TEST NOW HELP!!! Triangle ABC is an equilateral triangle. how many lines of symmetry does triangle ABC have? a 0 b 1 c 3 d 6

*asked on March 24, 2017* -
## Physics

Physics lab need help with sources of error. In our lab, we had to use carbon tape and a spark timer to find out the maximum velocity and maximum acceleration of a high school student. I'm having a hard time to find sources of errors. Any ideas or insights

*asked on March 17, 2017* -
## Math

To find the difference of 7 - 3 5/12 how do you rename the 7?

*asked on March 3, 2017* -
## Math check

What is 6 5/6 - 5 1/2 This is my answer:1 2/6 or simple form: 1 1/6

*asked on March 3, 2017* -
## Math

Why is it necessary to rename 4 1/4 if you subtract 3/4 from it

*asked on March 2, 2017* -
## Science

What do we mean when we say, "The speed of the car is 90 km/h."?

*asked on February 28, 2017* -
## Math

On a centimter dot grid, draw all pissible rectangles with area of 12 sq cm and sides whose length s are whole centimeters. Label the lengths of two adjacent sides of each rectangle.

*asked on February 10, 2017* -
## Physics

3 identical point charges Q are placed at the vertices of equilateral triangle (length of each side is equal to 2m) if Q=60uC, what is the magnitude of Electrostatic force on any one of the charges.

*asked on February 9, 2017* -
## math

Laura inherits $30,000 and decides to invest part of it in an education account for her daughter and the rest in a 10-year CD. If the amount she puts in the education account is $5,000 more than twice the amount she puts in the CD, how much money does

*asked on February 5, 2017* -
## 6 th grade

Bill's average score for 10 test was 88. If his lowest score, 70, is not counted, what was his average for the remaining test?

*asked on February 1, 2017* -
## Maths

Breed of 580 mils per hour drive from 21 1/2 hours

*asked on January 27, 2017* -
## science

Conversion of energy from one form to another usually releases what

*asked on January 26, 2017* -
## Math

If the 15th and 16th term of an arithmetic sequence are 99 and 92 respectively then the 5th term is? Studying for math final and I cannot figure this out

*asked on January 17, 2017* -
## math

If Larry worked 411/2 hours this week and spent 1/3 of his time hauling material, how much actual time did Larry spend hauling

*asked on December 30, 2016* -
## Bio

if you knew makeup of a specific proteins in a cell , how would you determine the particular dna code that coded for them

*asked on December 21, 2016* -
## Criminal Justice CRJ 220

What is an example of thinking in an exclusive way, which may inhibit the process of intellectual growth and moral development?

*asked on December 16, 2016* -
## Algebra II

Bill's Sporting Goods makes baseballs and softballs. In a given week they can manufacture no more than 70 balls. When setting equipment, they have to make at least 20 baseballs and at least 10 softballs. They make 6$ for each softball sold and 5$ for each

*asked on December 13, 2016* -
## Algebra

Can you please help me with this problem: The x-intercept of a line has a value of -7/6 and a y-intercept of 7. Another line has a slope that is twice the slope of the first line an a y-intercept that is 15 more than the first lines' y-intercept. What is

*asked on December 10, 2016* -
## Statistics (Math 210)

Hi there, I am doing my statistics homework and am having trouble with a few problems. I sincerely appreciate any help I receive! :) According to a local chamber of commerce, in 1993, 5.9% of local area residents owned more than five cars. A local car

*asked on December 5, 2016* -
## Statistics (Math 210)

Hi there, I am doing my statistics homework and am having trouble with a few problems. I sincerely appreciate any help I receive! :) A manufacturer claims the standard deviation of salt in their meat is .5. An SRS of 18 samples shows the standard deviation

*asked on December 5, 2016* -
## Statistics (Math 210)

Hi there, I am doing my statistics homework and am having trouble with a few problems. I sincerely appreciate any help I receive! :) A manufacturer claims that the mean lifetime of its lithium batteries if 1200 hours. A homeowner selects 25 of there

*asked on December 5, 2016* -
## Math

Two debts ---- the first of $800 due six months ago and the second of $1400 borrowed one year ago for a term of three years at 6.5% compounded annually ---- are to be replaced by a single payment one year from now. Determine the size of the replacement

*asked on December 4, 2016* -
## Math

The sum of 24 and Vanessa's age is 40

*asked on November 23, 2016* -
## Stats

4 teachers selected from 13 parents and 5 teachers

*asked on November 22, 2016* -
## Arithmetic

If pencils are bought at 70 cents per dozen and sold at 3 for 20 cents, the total profit on 6 dozen is?

*asked on November 16, 2016* -
## Arithmetic

a folding chair regularly sells for $29.50. how much money is saved if the chair is bought at a 20% discount?

*asked on November 15, 2016* -
## science

a bullet is shot from a springfield rifle with a speed of 3,015 ft/s. assuming the bullet moved at a constant velocity, what is the time required for the bullet to strike a target 4,146 meters away

*asked on November 9, 2016* -
## Marh

What is 3 pints to 15 pints?

*asked on November 9, 2016* -
## MATH

An inch on a map represents 200 miles. On the same map, a distance of 375 miles is represented by? A. 1 1/2 inches B. 1 7/8 inches C. 2 1/4 inches D. 2 3/4 inches Thank you for your help.

*asked on November 9, 2016* -
## Arithmetic

a boy sold $88.50 worth of stationery. If he received a 33 1/3% commission, what was the amount of his commission?

*asked on November 7, 2016* -
## arithmetic

on a certain day, the temperature range from -2f to 10f. what is the difference between the high and low temperatures for that day?

*asked on November 7, 2016* -
## Statistics

"Suppose two independent samples have been collected.Based on a sample of 26 from the first population, you observe 14 successes. The second sample of size 26 had 17 successes. What is the critical value for a 85% confidence interval that compares these

*asked on November 5, 2016* -
## Arithmetic

A man paid $42.30 for gasoline in may, $38.60 in June, and $43 in July. What was the average monthly cost for gasoline?

*asked on November 5, 2016* -
## Arithmetic

A man owned 75 shares of stock worth $50 each. The corporation declared a dividend of 8 percent payable in stock. How many shares did he then own? 81 shares but how?

*asked on November 5, 2016* -
## Math

Six gross of special drawing pencils were purchased for use in a department. If the pencils were used at the rate of 24 a week, the maximum number of weeks that the 6 gross of pencils would last is?

*asked on November 5, 2016* -
## math

A dealer bought some bicycles for $4,000. He sold them $6,200, making $50 on each bicycle. How many bicycles were here?

*asked on November 5, 2016* -
## math

A man owned 75 shares of stock worth $50 each. The corporation declared a dividend of 8%, payable stock. how many shares did he then own?

*asked on November 5, 2016* -
## math

A man owned 75 shares of stock worth $50 each. The corporation declared a dividend of 8%, payable stock. how many shares did he then own?

*asked on November 3, 2016* -
## science

kinsey leaves her house to exercise and run straight down a long street for 5.00 meters at a constant rate of 3m/s then turns and run back toward her house for 2 meters what is her average speed in m/s what is her displacement what is her average velocity

*asked on November 1, 2016*