# Todd

Most popular questions and responses by Todd
1. ## chemistry

How many kilojoules are required to melt 15g of ice at 0 degrees C, and raise the temperature of the liquid that forms to 85 degrees C?

2. ## Math

A trash company is designing an​ open-top, rectangular container that will have a volume of 135 ft^3.The cost of making the bottom of the container is​ $5 per square​ foot, and the cost of the sides is​$4 per square foot. Find the dimensions of

3. ## Physics

I don't completely understand what this question is asking: Three people are standing on a horizontally rotating platform in an amusement park. One person is almost at the edge, the second one is (3/5)R from the center, and the third is (1/2)R from the

4. ## ela PLE IVE ME RIGHT ANSWERS I REALLY NEED HELP

2. IN ONOMONIAPEIA WHAT dose the speaker mean to convey with the following lines Splash/splatters/scatters/spurts a. the water is not running b. the water is running regularly c. the water is running slowly d. the water is running irregularly 4. identify

5. ## Chemistry

Comment on the relative acidities of h3po4 and the h2po4 ion? I don't understand what this question is asking? Would H3PO4 is a strong acid and will completely dissociate into ions in aqueous solution suffice?

6. ## math

A small plane is flying a banner is 144 square feet. The width of the banner is 1/4 the length of the banner. What are the dimensions of the banner?

7. ## Chemistry

"A voltaic cell is constructed by immersing a strip of sillver metal in a 1.0 MAgNO3 solution and a strip of cadmium metal in a 1.0M Cd(NO3)2 solution. The circuit is completed by a wire and a salt bridge in the usual way. a. Write the balanced overall

8. ## PHYSICS

An alpha particle (which has two protons) is sent directly toward a target nucleus containing 80 protons. The alpha particle has an initial kinetic energy of 0.79 pJ. What is the least center-to-center distance the alpha particle will be from the target

9. ## chem

A solution of ammonia and water contains 3.80×1025 water molecules and 5.80×1024 ammonia molecules. How many total hydrogen atoms are in this solution?

10. ## physics

A person sitting in a chair (combined mass 80kg) is attached to a 6m long cable. The person moves in a horizontal circle. The cables angle is 62 degrees below the horizontal. What is the persons speed? Note: the radius of the circle is not 6m. I really

11. ## Applied statistics for business and economics

Only 0.02% of credit card holders of a company report the loss or theft of their credit cards each month. The company has 15,000 credit cards in the city of Memphis. Use the Poisson probability tables to answer the following questions. What is the

12. ## Physics

Fairgoers ride a Ferris wheel with a radius of 5.00 {\rm m} . The wheel completes one revolution every 31.5 s What is the average speed of a rider on this Ferris wheel? If a rider accidentally drops a stuffed animal at the top of the wheel, where does it

13. ## World history

How did the status of slaves in African society contrast with the Americas? What rights and opportunities were available to slaves in African but limited or prohibited in the Americas ?

14. ## Math

Find f if f′(x)=2/x,x

15. ## Physics

1.There are four charges, each with a magnitude of 2.5 µC. Two are positive and two are negative. The charges are fixed to the corners of a 0.29 m square, one to a corner, in such a way that the net force on any charge is directed toward the center of the

16. ## statistics

Find the standard deviation, Sigma, for the binomial distribution which has the stated values of n and p. Round your answer to the nearest hundredth. n = 639; p = 0.7

17. ## algebra

Marlene drive 540 miles to visit friend. drive for 3 hours then stopped for gas, then drive 4 more hours stopped for lunch. how many more hours do I drive if my average speed for trip is 60 miles per hour ? How would I write an equation?

18. ## math

3.which one of these is a rational number a 150 b. 441 c. 200 d. 250##

19. ## statistics

every year thousands of students take the SAT'S. Recent trends show that the scores on the verbal section follow an approx. normal distribution with mean of 350 and stand. deviation of 110 A)a student is chosen at random. it is noted that only 8% of

20. ## Math

Monica stepped outside and began to think how fast she is moving even when she is standing still. Assume that the earth is a sphere with a radius of 3960 miles and Monica is at a latitude of 13∘N. What is Monica's speed due solely to the rotation of the

21. ## Math

Write 5+7+9+11+13+15+17 in sigma notation.

22. ## Maths

A tank with 520L of water begins to leak at a rate of 2L per day, At the same time, a second tank is being filled at a rate of 1L per hour, starting at 0L. How long does it take for the tanks to have the same volume?

23. ## MATH

MIKE HAS 2 MATS THAT ARE IN THE SHAPE OF TRIANGLES THE SCALE FACTOR OF THE 2 TRIANGULAR MATS IS 7/9 WHAT IS THE RATIO OF THE PERIMETERS?

24. ## Algebra

Write an equation of the direct variation that includes the point (–3, –9). Direct variation can be expressed with this equation: y = kx Using your point, let's find k. -9 = -3k 3 = k Equation: y = 3x Thanks it makes sense

25. ## Physics

A bullet with a mass of 4.0 g and a speed of 650 m/s is fired at a block of wood with a mass of 9.7×10−2 kg. The block rests on a frictionless surface, and is thin enough that the bullet passes completely through it. Immediately after the bullet exits

26. ## calculus

Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.

27. ## science physics

1.) What is the Magnitude of the electrostatic force on a +5 C charge 1.75 m to the left of a -2.5 C charge? (show your work) 2.) In What direction does the force on the +5 C charge act? 3.)Calculate the magnitude of the electric field of the -2.5 C charge

28. ## Physics

Nitrogen gas is introduced into a large deflated plastic bag. No gas is allowed to escape, but as more and more nitrogen is added, the bag inflates to accommodate it. The pressure of the gas within the bag remains at 1 \rm atm and its temperature remains

29. ## Physics

A 95 kg rowboat is initially at rest, until it is pulled toward the dock with a rope with a tension of 30.0 N. The dock is higher than the boat, and the rope makes an angle of 25° at the place where it meets the boat. What is the acceleration of the boat?

30. ## Physics

A 90 kg astronaut and a 1100 kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.24 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with

31. ## Chem

Identify the conjugate acid-base pairs in the following reactions. (a) NH4+(aq) + OH-(aq) NH3(aq) + H2O(l)

32. ## statistics

Do students tend to improve their SAT mathematics (SAT-M) score the second time they take the test/

33. ## Physics

A 1.10 kg} block of wood sits at the edge of a table, 0.790 m above the floor. A 1.10×10−2 kg} bullet moving horizontally with a speed of 725 m/s embeds itself within the block. What horizontal distance does the block cover before hitting the ground?

34. ## Maths

Nina, Shanti and Belle run a 1000 m race at a constant speed. When Nina crossed the finish line first, she was 200 m ahead of Shanti and 400 m ahead of Belle. When Shanthi crossed the finish line, how far ahead of Belle was she?

35. ## Chem.

If 229 g of Pb(NO3)2 and 190 mL of 1.68 M aqueous NaI are reacted stoichiometrically according to the balanced equation, how many grams of Pb(NO3)2 remain? Round your answer to 3 significant figures. Pb(NO3)2(aq) + 2NaI(aq) → PbI2(s) + 2NaNO3(aq)

36. ## statistics

Every year thousands of students take the SAT'S. RECENT TRENDS SHOW THAT THE SCORES ON THE VERBAL SECTION FOLLOW AN APPROX. NORMAL DISTRIBUTION WITH MEAN 550 AND STANDARD DEVIATION OF 110 68.26% OF THE STUDENTS WHO TAKE THE SAT VERBAL SCORE BETWEEN ______

37. ## calculus

Choose the correct quantity to fill in the blank: Integral_______ dx = (ax2 - a2)4 + C.

38. ## Stats

Use this table to answer the questions. Height (in inches) Frequency 50-52 5 53-55 8 56-58 12 59-61 13 62-64 11 1. Identify the class width. 2. Identify the midpoint of the first class. 3. Identify the class boundaries of the first class. 4. Give the

39. ## physics

Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 52 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall. Answer in units of m/s2.

40. ## algebra

The speed of a passenger train is 16 mph faster than the speed of a freight train. The passenger train travles 300 miles in the same time it takes the freight train to travel 220 miles. find the speed of each train

41. ## Algebra

A bag of M&Ms contains 12 red, 11 yellow, 5 green, 6 orange, 5 blue, and 16 brown candies. What is the probability that if you choose 2 M&Ms from the bag (one after the other) without looking, you will choose 2 yellow ones?

42. ## Economics

The demand curve for a monopoly is: 1. the MR curve above the AVC curve. 2.above the MR curve. 3.the MR curve above the horizontal axis. 4. the entire MR curve.

43. ## Chemisty

I need a recap of how to do the question below. I just need the basic guidelines: The enthalpy change for the reaction 2H2(g)+O2 > 2H2O is -571.6kJ. Determine the enthalpy change for the decomposition of 24.0g H2O.

63. ## Algebra

12(74y - (6+5Y - 8Z) = Please show work

Does anyone know the old formula to calculate a hourly raise from a percentage; I totally forgot. The employee makes $10.50 an hour and is receiving a 1.1% increase. asked on March 10, 2011 65. ## chemistry The Ka of stearic acid is 1.3 x 10^-5. what is the Kb of stearate? asked on November 15, 2010 66. ## Physics You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point? asked on June 30, 2010 67. ## grammar Language—Making Language Nonracist and Nonagist His grandmother really enjoys spending the afternoon at the center for senior citizens. This sentence i feel is right am i missing something. His grandmother really enjoys spending the afternoon at the asked on July 11, 2006 68. ## Algebra Four times the sum of 9 and some number is 60. What is the number? asked on December 6, 2016 69. ## math a new statue with a circular base is being unveiled. The statue's base has a radius of 8 ft. What is the area of the base? Round to the nearest whole number. Use 3.14 for p. asked on March 11, 2016 70. ## physics three antinodes witha peak to peak displacement of 3 cm are observed on a vibrating string of length l and linear density the hanging mass is m what is the velocity of the propagation of transverse waves of the string asked on July 25, 2013 71. ## Finance A company has total assets of$8,500,000 and its total turnover of 2.35 times. If the return on assets is 9 percent, what is its profit margin? Please help with a formula?

Find the sum of each infinite series, or state that the sum doesn'nt exist 1/7+5/14+25/28+

73. ## Statistics

Tony’s father, an accountant, has been listening to Tony tell him about Type I errors and α = .05. He responds: “.05? That means you’re making an error one time in twenty! If I made errors 5 percent of the time I’d be out of a job so fast it would

____= 8+2?

75. ## math

I have 8 ones and 2 hundreds. I am between 270 and 280. what number am I?

76. ## math

i have fewer ones than tens. the value of my tens is 30.what two numbers can i be

77. ## Calculus

x^2-5/x lim x=0^+

78. ## calculus

Just doing example questions to better understand. Find all first and second partial derivatives for the function u= xy^2+x^2y

79. ## PHI 103

In the truth table for an invalid argument

80. ## geometry

An airplane descends 3.5 miles over a horizontal distance of 25 miles. How far did the plane actually travel?

84. ## rainwater

What would cause rain water puddle to turn black in color

85. ## Algebra

12(74y - (6+5Y - 8Z) = Please show work

86. ## physics

Outside air generally contains some water vapor (typically 1-2% by mass). Does it take more, less, or the same heat to raise the temperature of 1kg moist air than is needed to raise the temperature of 1kg dry air by the same amount?

The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet–Pstore >.10 B.

The company offers two types of sales: 1. Internet sales; 2. Store sales. The marketing research manager believes that the Internet sales are more than 10% higher than store sales. The null hypothesis would be: A. Pinternet–Pstore >.10 B.

89. ## Physics

Block A and block B (see figure below) are forced together, compressing a spring (with spring constant k = 2220 N/m) between them 2 cm from its equilibrium length. The spring, which has negligible mass, is not fastened to either block and drops to the

90. ## Phy

You shoot an arrow into the air. Two seconds later (2.00 {\rm s}) the arrow has gone straight upward to a height of 32.0 m above its launch point. What is the initial velocity and how long did it take for the arrow to reach 16.0 m above the launch point?

91. ## busniess

What are the four functions of management?

92. ## Public Relations

I am promoting a new product for General Motors in my pr class. I need an objective for this product. Will my objective be one sentence or how will I write it, give me an example please.

93. ## statistics

A new treatment for AIDS is to be tested in a small clinical trial on 15 patients.The proportion p^ who respond to the treatment will be used as an estimate of the proportion p of (potential)responders in the entire population of AIDS patients. If in fact

94. ## Algebra

simplify the following expression 10x - 12x

95. ## Algebra

solve for w w -8 = 9

96. ## environmental science

pros and cons of at least three alternative methods for maximizing food production

97. ## Maths

A single ordered data set includes the following data. 2, 4, 5, 6, 8, 10, x. What is the largest possible value of x if it is not an outlier?

98. ## Maths

If the area of a square is reduced by a factor of 4, how have the sides changed?

99. ## Maths

A,B,C are collinear points and AB=BC. If A is the point (4,5) and B is the point (1,-1) find the coordinates of C.