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Ellie

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I am having a really rough time figuring out how this expected value was found in this Chi Square problem.272 flies had long
1. 1 answer
2. 521 views
Consider a child standing on a beach who gets hit by a wave. The child weighs 30 kg, and the portion of the wave that hits the
1. 1 answer
2. 1,121 views
Some stoves use the heat produced by current flowing through a conductor. If the heating element (conductor) has a resistance of
1. 1 answer
2. 837 views
A sailboat is heading directly north at a speed of 16 knots (1 knot = 0.514 m/s). The wind is blowing towards the east with a
1. 1 answer
2. 993 views
what is an equivalent fraction to 10/4 that starts with 90?
1. 3 answers
2. 515 views
what is an equivalent fraction for 7/6 that has a numerator of 84
1. 4 answers
2. 1,080 views
1. 2(x-3)=2xA. One solution B. No solutions C. Infinitely many solutions 2. 3(y-3)=2y-9+y A. One solution B. No solutions C.
1. 2 answers
2. 537 views
There were 20 at a round table at dinner, each of whom shook hands with the person on his or her immediate right and left.At the
1. 2 answers
2. 730 views
Discuss the social reforms that shaped the nation in the 1800s. What do you think have been the lasting impacts of the Reform
1. 7 answers
2. 1,739 views
From a point A, 30 meters from the base of a building B, the angle of elevationto the top of the building C is 56 degrees. The
1. 1 answer
2. 1,372 views
If a population of fruit flies doubles every 3 days. What is k, the proportionality constant?How would I solve this problem?
1. 1 answer
2. 752 views
Consider the Bohr energy expression (Equation 30.13) as it applies to singly ionized helium He+ (Z = 2) and an ionized atom with
1. 1 answer
2. 1,636 views
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 5 excited state. The atom returns to
1. 0 answers
2. 952 views
Determine the ratio of the relativistic kinetic energy to the nonrelativistic kinetic energy (1/2mv2) when a particle has a
1. 0 answers
2. 608 views
Why would you round to nearest 100 rather than nearest 10?
1. 1 answer
2. 402 views
8(7-3*9)/8+245
1. 1 answer
2. 343 views
If f(x)=3x^2 -2x -3, let g(x)=f^-1(x). Find the slope of g(x)=f^-1(x) at the point (5,2).a.) g'(5)=1/10 b.) g'(5)=1/5 c.)
1. 1 answer
2. 430 views
A step-up transformer is used on a 100 V line to increase the potential difference to 1200 V. If the primary has 120 turns, then
1. 3 answers
2. 946 views
A 67.6 ohms resistor is connected in parallel with a 103.8 ohms resistor. This parallel group is connected in series with a 20.8
1. 1 answer
2. 701 views
The width of a rectangle is 3 units less than the length. If the area is 70 square units, then find the dimensions of the
1. 1 answer
2. 1,022 views
An ocean liner leaves New York City and travels 25.1 degrees north of east for 110km. How far east and how far north has it
1. 1 answer
2. 1,769 views
Build a table to estimate lim sin(1/x) as x approaches zero. Use multiples of pi.I built a table, but do not understand why this
1. 1 answer
2. 536 views
Graph f(x)= { 4 if (0<x<4){ 5 if (4<(or equal to)x<(or equal to)10) and use the graph to evaluate the lim as x--> 4 of { 4 if
1. 1 answer
2. 389 views
The Fibonacci sequence was first discovered during a study of rabbits. If newborn rabbits become adults in one month, each pair
1. 4 answers
2. 1,477 views
In the complete combustion of C3H8 (propane), how many liters of CO2 are produced from 10 liters of O2?
1. 2 answers
2. 1,479 views
Four charges are placed at the four corners of a square of side 15 cm. The charges on the upper left and right corners are +3
1. 1 answer
2. 911 views
Three lights all go on one changes every 5 sec one every 6 sec one every 8 sec when will they all go on together
1. 1 answer
2. 309 views
What is the least common multipulls 5 6 8
1. 2 answers
2. 441 views
Three lights go on together first changes every 5 sec second every 6sec third every 8 sec when is the next time they go on
1. 1 answer
2. 462 views
Which of the following series diverges?a) 5 + 10 + 15 + 20 +... b) 45 + 15 + 5 + 5/3 + ... c) 3/4 + 3/16 + 3/64 +.. d) 1/2 + 1/4
1. 1 answer
2. 445 views
What is the heat required in kilocalories to convert 2 kg of ice at 0°C completely into steam at 100°C?-80 Calories -1440
1. 2 answers
2. 4,074 views
The value of a particular investment follows a pattern of exponential growth. You invested money in a money market account. The
1. 3 answers
2. 1,841 views
Calculate the linear speed of a bicycle with 26-inch wheels being pedaled at a rate of 200 revolutions per minute. Express your
1. 4 answers
2. 1,103 views
(The number of times a bicycle tire rotates in a given time period is directly related to the distance traveled in that time
1. 2 answers
2. 927 views
The temperature in your house is controlled by a thermostat. The temperatures will vary according to the sinusoidal function:f(x
1. 1 answer
2. 1,319 views
The intensity of sound is x W/m2 at a distance of 5 m from the source. What is the intensity of the sound at a distance of 20 m
1. 1 answer
2. 1,869 views
Solve the equation for 0≤ x ≤ 180 given tan(x) sin^2(x)=2tan(x)How do I do this? Thank you and Merry Christmas! :)
1. 3 answers
2. 481 views
After one hour in flight, an airplane is located 200 miles north and 300 miles west of the airport. What is the magnitude of the
1. 1 answer
2. 1,965 views
The length of a day in Philadelphia, Pennsylvania, is given by the sinusoidal function, f(t), which represents the number of
1. 1 answer
2. 1,081 views
The length of a day in Philadelphia, Pennsylvania, is given by the sinusoidal function, f(t), which represents the number of
1. 1 answer
2. 1,737 views
Explain how the transformations of the functions f(x)=15sin(x) and f(x)=sin(x)+15 differ.I see that f(x)=sin(x)+15 experiences a
1. 2 answers
2. 683 views
1.) INDUSTRIAL REVOLUTION:Why is there such a massive gap in the world today between rich and poor nations? 2.) IMPERIALISM: How
1. 5 answers
2. 1,326 views
1.) Use sigma notation to describe the sum of the first ten terms of the arithmetic sequence.20+18.5+17+15.5+14+12.5+11+9.5+8+6.
1. 1 answer
2. 967 views
From an hour with Abuelo: which paragraphs represent the exposition in Abuelo's story?paragraphs 8–10 paragraphs 10–12
1. 14 answers
2. 3,548 views
I have two questions:1. You want to make an investment in a continuously compounding account earning 18% interest. How many
1. 1 answer
2. 1,722 views
You want to make an investment in a continuously compounding account over a period of two years. What interest rate is required
1. 1 answer
2. 917 views
---- are nutrients that are needed for growth and repair of the body's tissues.Carbohydrates Fats Fibers Proteins
1. 1 answer
2. 1,738 views
Which of the following foods is usually highest in protein? AppleChicken Bread Candy bar
1. 8 answers
2. 2,949 views
I need help understanding these, please. Thanks!1. A 2 kg body moves with constant velocity when a force of 10 N is applied.
1. 2 answers
2. 893 views
The manager of a band recommends that the band sell its CDs for $8.75. The band decides to sell the CD for p dollars.A) Write an
1. 2 answers
2. 944 views
Which if the following is a mandatory standard? (1 point)1) Food Labels 2) National Health and Safety Standard 3) dietary
1. 2 answers
2. 1,791 views
The Norman window illustrated below has a semicircular section on top of a rectangle. The radius of the semicircle is x. The
1. 2 answers
2. 726 views
Mrs Raja and Mrs lee have some eggs to sell. If mrs raja sells 30 eggs per day and mrs lee sells 15 eggs per day , mrs lee will
1. 2 answers
2. 803 views
Convert the rectangular coordinate (-8,i (square root of 3) into polar coordinates.How do I do this?? I tried every way I knew
1. 2 answers
2. 579 views
write the complex number -5 in polar form.I don't get how to do this because arctan of b/a would be 5/0 which is a fraction with
1. 1 answer
2. 560 views
Analyze the validity of the following argument:Sally argues, "Mom, your rules are way too strict! Melissa's mother lets her stay
1. 2 answers
2. 496 views
#1.) Write (1-i)^10 in a+bi form.#2.) Write (1+i)^20 in a+bi form. How do I do these? Thanks!
1. 2 answers
2. 545 views
change the polar equation r=5/1+cos(theta) to rectangular form.How do I do this? Thank you! :)
1. 4 answers
2. 12,662 views
A man walks for 5 km/hr for 1 km and 7 km/hr for next 1 km. What is his average speed for the walk of 2 km?-5.8 km/hr -6.0 km/hr
1. 2 answers
2. 643 views
Three ways Cyrano in the play Cyrano de Bergerac show his panache?
1. 5 answers
2. 605 views
A factory produces bicycles at a rate of 100+0.4t2−0.7t bicycles per week (t in weeks). How many bicycles were produced from
1. 0 answers
2. 803 views
Imagine that the asteroid A that has an escape velocity of 50m/s. If asteroid B has twice the mass and twice the radius it would
1. 4 answers
2. 3,203 views
If 22 mol of benzene are completely reacted with molecular oxygen, how many moles of carbon dioxide will be produced?
1. 2 answers
2. 563 views
calculate the average kinetic energies of CH4 and N2 molecules at 273k and 546k
1. 1 answer
2. 1,417 views
Points P and Q are tries toom points on segment AB. If AQ =7x+6 and PQ= 3x+5, find all possible values for the length of AB.So
1. 1 answer
2. 454 views
A 4.43 gram sample of phosphorus was burned in air to produce 10.15 g of an oxide. What's the empirical formula of this
1. 2 answers
2. 560 views
how many moles of atoms are contained in7.654 x 10^32 atoms of Ga ? Thank you!
1. 1 answer
2. 434 views
How many moles of atoms are contained in 5.60 grams of Sulfur? Can someone help me understand how to work out other problems
1. 2 answers
2. 1,099 views
Larry and Gary are discussing whose garden has the most area to plant flowers. Larry claims that all they have to do is walk
1. 1 answer
2. 1,968 views
How can I find the area of an angle?" How do you respond?
1. 1 answer
2. 378 views
Jordan throws a golfball straight up from the top of a building 50 meters high. The initial speed of the golfball is 20 m/s and
1. 1 answer
2. 488 views
Which anions have the largest and smallest radii? Thank you!!
1. 1 answer
2. 695 views
Which positive ion (cation) has the smallest radius? Please help! Thanks!
1. 1 answer
2. 434 views
For how many values of n where n is a positive integer less than 10 is n+1/2 an integer?A) None B) One C) Three D) Four E) Five
1. 2 answers
2. 1,004 views
Hi! I know I asked this before, but I still don't understand how to solve the problem:"Since a hydrogen atom consists of one
1. 1 answer
2. 592 views
Since a hydrogen atom consists of one proton and one electron, it should have a mass of 1.763 x 10^-24 grams. Using unit
1. 2 answers
2. 976 views
A metal bar having a mass of 212 g is heated to 125.0°C and then dropped into 375 g of water at 24°C. After a while the
1. 1 answer
2. 983 views
What's the difference among a simple sentence, complex, compound, and compound-complex. I always have a difficult time knowing
1. 1 answer
2. 659 views
The first two terms in the expansion of (1+ax/2)^10 + (1+bx)^10 in ascending powers of x., are 2 and 90x^2Given that a is less
1. 3 answers
2. 854 views
Hello, what is a common theme between the Shakespeare's Romeo and Juliet, To Kill a Mockingbird, and Roahl Dahl's Lamb to the
1. 0 answers
2. 559 views
The temperature at 6,000 m altitude is 11 degrees Celsius. At 4,000 m, the temperature is at 2 degrees Celsius. How much colder
1. 1 answer
2. 475 views
An insect inside a bus flies from the back toward the front at 2 m/a. The bus is moving in a straight line at 2m/a. What is the
1. 1 answer
2. 778 views
a fair coin is tossed in the air 4 times. if the coin lands heads up the first three tosses, what is the probability the coin
1. 3 answers
2. 739 views
Tina solved for the decimal value 0f(3/5*18) and got an answer of 5.4. Four of her classmates argued that her answer was not
1. 3 answers
2. 532 views
a number line below-5 -4 -3 -2 -1 0 1 2 3 4 5 Which of the expressions below represent the distance between -4 and 5 on the
1. 2 answers
2. 3,309 views
a copy machine makes c copies in m minutes according to the equation c=60m. what is the unit rate of copies per minute?I think
1. 6 answers
2. 1,253 views
a copy machine makes c copies in m minutes according to the equation c=60m. what is the unit rate of copies per minute?I think
1. 1 answer
2. 499 views
a park is 3/4 mile long and 1/2mile wide. Which fraction represents the ratio of the parks length to its width?I did it by 3/4
1. 2 answers
2. 2,518 views
The heart shaped card is made by placing a square card and two semicircles together. What is the area of the card.each side of
1. 4 answers
2. 1,092 views
Fe3+ + I1- �¨ Fe2+ + I21. Balance the equation 2. Which element is being oxidized? 3. Which element is the reducing agent?
1. 2 answers
2. 3,000 views
If a pendulum-driven clock gains 5.00 s/day, what fractional changein pendulum length must be made for it to keep perfect time?
1. 0 answers
2. 687 views
At what rate will a pendulum clock run on the Moon, where theacceleration due to gravity is 1.63 m/s2 , if it keeps time
1. 1 answer
2. 5,122 views
A 2.0kg block hang from a vertical spring causes it to stretch by 200cm. If the 2.0kg block is replaced by a 0.50kg mass and the
1. 3 answers
2. 1,251 views
during a match, pat kicks a football onto the roof of the stand. The stand and the path of the ball are at righ angles to each
1. 1 answer
2. 706 views
A crane is lifting a 500kg payload straight up at a constant speed of 0.7ms-1.(a)What is the power output of the crane.
1. 2 answers
2. 1,122 views
During a car crash a 65kg person's head goes from traveling at 50km h-1 to stationary in 0.15s.(a)What is the magnitude of the
1. 1 answer
2. 2,630 views
The Earth has a mass of 5.97 x10^24 kg and the Moon has a mass of 7.36 x10^22kg. The average distance between the center of the
1. 2 answers
2. 1,523 views
An 8g bullet leaves a gun at 700ms-1.(a) what is the maximum height that this bullet could reach (ignoring air resistance)
1. 1 answer
2. 652 views
An 8g bullet leaves a gun at 700ms-1.(a) what is the maximum height that this bullet could reach (ignoring air resistance)
1. 0 answers
2. 552 views
Two 30kg children in a 20 kg cart are stationary at the top of a hill. They start rolling down the 80m tall hill and they are
1. 1 answer
2. 676 views

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