# thomas

Newest questions and responses by thomas-
## english

main idea of A Screamingly Good Science Lesson

*asked on February 6, 2019* -
## Differential Equations

Hello, I am needing help to find the general solution to: dy/dt + y = te' Thanks!

*asked on January 27, 2019* -
## math

Tommy had a bag of 100 balloons.he took out 2 red balloons and 1 blue balloon for each party favor.He created 12 party favors how many balloons did Tommy have left

*asked on October 4, 2018* -
## History

In Uncle Tom's Cabin, (the book) did blacks have a racial caste system? Please explain.

*asked on August 5, 2018* -
## Pre Calculus

Find The Area Bounded by the given curves. How would I set this up to solve? x=2, x=5, y=1/x, y=1/x^2

*asked on April 28, 2018* -
## math

Jose owns 40 shares of stock A whose price increased by $0.75 per share. He also owns 100 shares of stock B whose price decreased by $0.20 per share. What is the total change in the value of Paul’s stock (A and B together)? Please help solve

*asked on April 19, 2018* -
## physics

A spiral spring has a lenght of 14cm when a load of 4N is hung on it.A force of 6N extends the spring by 4cm.calculate the unstretched lenght of the spring.

*asked on March 9, 2018* -
## math

A spider has eight legs in all. If a boy in a class three was asked by his elder brother to count the total number of legs of seven goats, thirteen fowls and four spiders, how many is he supposed to get after counting?

*asked on January 17, 2018* -
## English

How would "In a Station of the Metro" change if the bough was bright and lively rather than wet and black?

*asked on January 11, 2018* -
## Math

Which statement justified the given ordered pair as a solution to the system of equations (-1, -13), (y=3x-10), (y=-2x-15)

*asked on January 10, 2018* -
## Math

Rationalize the denominator of (3 * cube root of 12 - 8) / (cube root of 9 - cube root of 6). Please show steps and the full process to rationalize.

*asked on October 19, 2017* -
## Math

What would (4sqrt(3)-2sqrt(5) be multiplied by to get a product of (4sqrt(3))^3 - (2sqrt(5))^3?

*asked on October 11, 2017* -
## Math

A spinner turns 7077 degrees. The spinner would have ended up at the same spot if it had turned only what degree? A) 77 B) 2197 C) 4377 D) 4917 E) 5537

*asked on September 21, 2017* -
## math

The average monthly temperatures in New Orleans, Louisiana, are given in the following tables: MonthJFMAMJ°C 16.5 18.3 21.8 25.6 29.2 31.9 MonthJASOND°C 32.6 32.4 30.3 26.4 21.3 18.0 What characteristics of the function correspond to the constants a, b,

*asked on September 1, 2017* -
## math

sin2x − cos2x − tan2x = 2sin2x − 2sin4x − 1/ 1 − sin2x for x = 45

*asked on August 30, 2017* -
## Chemistry

What is basic like NaOH,from the following? 1)CH3NH2 2)(CH3)2NH 3)(CH3)3N 4)[N(CH3)4]^-(OH^-) 5) 2,4,6-aniline What is the reason?

*asked on July 25, 2017* -
## Chemistry

We are asked to write the three products of the reaction between CH3COOH and NaHCO3(given one is a gas) They would be, 1)CH3COO^-(Na)^+ 2)CO2(g) And what would be the third product? As NaHCO3 is acidic would that be Na2CO3? Because CH3COO^-(Na)^+ is a weak

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

A single sphere of water is created by joining 1000 of water spheres of radius r and charge (+Q).If the potential of the small and big spheres are w and v respectively, find v/w. My thoughts : The masses of the spheres are proportional to the third power

*asked on July 23, 2017* -
## Science

Why do earthquakes appear near the San Andreas Fault?

*asked on June 1, 2017* -
## Math

What is the area of a triangle 4.5,4, and 3.

*asked on May 22, 2017* -
## Math

In Mike's English class at university there are 178 students, of whom 51 also study history and 44 also study statistics. There are another 85 students who also study history, of whom 25 study statistics also. Another 35 students study only statistics. If

*asked on May 11, 2017* -
## Maths

How many squares in the plane have two or more vertices on dots in this 2x3 grid? All dots are an equal distance from their nearest neighbours. *diagonal squares count* -------------------------------------- I can only get 18, but some of my class members

*asked on April 7, 2017* -
## Math

Following the recent census, State A, with a population of 13.5 million, was allocated 23 representatives. State B, with a population of 12.4 million, was given 16 representatives. Assume one more representative is to be assigned to one of

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

Why would theorists and policymakers from different regions potentially approach IPE differently from one another? Any thoughts? It is said that Marxism is very common in developing countries. In the developed world, we are seeing the protectionism

*asked on March 23, 2017* -
## Math

A test has 12 problems, and each problem is worth 5 marks. Full marks are given for a correct answer, 2 marks are given if there is no answer, and no marks are given for an incorrect answer. Some scores between 1 and 60, are impossible to get on this test.

*asked on March 15, 2017* -
## Math

When wrapping a birthday gift in the shape of a rectangular prism for his mother, Kenji adds an additional 2.5 square feet of gift wrap to allow for overlap.How many square feet of gift wrap will Kenji use to wrap a gift 3.5 feet long, 18 inches wide, and

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

In Alaska Mt.McKinley is 890 meters taller than Mt. Foraker and 1198 meters taller then Mt. Blackburn is 4996 meters. What is the height of Mt. Foraker?

*asked on March 5, 2017* -
## Math

There are 52 white keys on a piano. The lowest key is A. The keys are designated A, B, C, D, E, F, and G in succession, and then the sequence of letters repeats, ending with a C for the highest key. a) If five notes are played simultaneously, in how many

*asked on March 5, 2017* -
## Math 253 algebra

Ann takes 2 hours to wash her car. When her sister helps her, the job takes 5/4 hours. How long does it take Ann's sister to wash the car by herself. ( Note:I created a table and gave ann a 1/2 fraction and her sister a x/1 fraction but got lost from

*asked on March 4, 2017* -
## Maths

One of the formulas to find the area of a triangle is a = r*s. Where the r is the radius of the circle inscribed the triangle, and s being the semi perimeter. (s = p/2) Prove that the same formula works for a square.

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

IF the LCM of two numbers a and b is 40, what is the LCM of 7a^2 and 7b^2?

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

When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down. Suppose the weight of the sky diver is 869 N and the drag force has a magnitude

*asked on January 5, 2017* -
## physics

Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the man is 84 kg, and the mass of the woman is 49 kg. The woman pushes on the man with a force of 58 N due east. Determine the

*asked on January 5, 2017* -
## physics

In a quarter-mile drag race, two cars start simultaneously from rest, and each accelerates at a constant rate until it either reaches its maximum speed or crosses the finish line. Car A has an acceleration of 11.0 m/s2 and a maximum speed of 110 m/s. Car B

*asked on January 5, 2017* -
## math

Only two forces act on an object (mass=3.19 kg), as in the drawing. Find (a) the magnitude and (b) the direction (relative to the x axis) of the acceleration of the object.

*asked on January 5, 2017* -
## physics

An electron is a subatomic particle (m = 9.11 x 10-31 kg) that is subject to electric forces. An electron moving in the +x direction accelerates from an initial velocity of +7.62 x 105 m/s to a final velocity of 2.56 x 106 m/s while traveling a distance

*asked on January 5, 2017* -
## College Physics

Two forces and are applied to an object whose mass is 5.75 kg. The larger force is . When both forces point due east, the object's acceleration has a magnitude of 0.979 m/s2. However, when points due east and points due west, the

*asked on January 5, 2017* -
## math

Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 7.9-kg projectile from rest to a speed of 2.8 × 103 m/s. The net force accelerating the projectile

*asked on January 5, 2017* -
## math

A person in a kayak starts paddling, and it accelerates from 0 to 0.614 m/s in a distance of 0.372 m. If the combined mass of the person and the kayak is 61.0 kg, what is the magnitude of the net force acting on the kayak?

*asked on January 5, 2017* -
## Math

In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 46.6 m/s in a time of 6.82 s. The mass of the car and riders is 6.72 × 103 kg. Find the average net force exerted on the car

*asked on January 4, 2017* -
## RATIOS AND RATES

At a local grocery store, Sabrina spends $3.96 for 2 pounds of blueberries. How much can she expect to pay for 6 pounds of blueberries?

*asked on January 3, 2017* -
## math

Given that the roots of the equation 3x^2+x+2=0 are a and b, show that 27a^4=11a+10.

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

what metal is it if, it is 7.14g/mL => Cast Iron.

*asked on December 28, 2016* -
## Calculus applications

6. The bending moment (M) along a beam is M = WLx/2 -Wx2/2 kNm where x is the distance of a beam length L from the left hand end. W is the weight per unit length. (a) Shear force is calculated as the differential of bending moment. Find an expression for

*asked on December 5, 2016* -
## history knowledge

I just want to know this for fun because I saw it and one of my history books and want to learn about it. Why did Alexander the Greats empire fall?

*asked on December 3, 2016* -
## Calculus applications

A steel factory wishes to make a cylindrical container, of thin metal, to hold 100cm³, using the least possible area of metal. If the outside surface is S cm² and the radius is r cm, show that S = 2πr² + 200r-1 and hence find the required radius and

*asked on November 24, 2016* -
## Algebra

Please help!! x^2+y^2+6y+5=0 x^2+y^2-2x-8=0

*asked on November 17, 2016* -
## Physics

A typical candy bar contains 300 kilo-calories of energy. if all the energy released by eating the candy bar could be used to do work in lifting a 1000 kg car, how high could it be lifted?

*asked on November 10, 2016* -
## math

Tom used 5/8 yard of ribbon to tie weights on the tail of his kite. He cut the length of ribbon in equal pieces that were 1/12 yard long. How many pieces, each 1/12 yard long did Tom cut from the 5/8 yard ribbon?

*asked on October 28, 2016* -
## Math

Three-dimensional tic-tac-toe can be played on three arrays of 3x3 lattice points. To win, three points in a line must be chosen. Examples of such lines are ABC, ADE, AFG, AHI, FHJ. How many different lines can be found?

*asked on October 21, 2016* -
## Public speaking

Nonverbal communication includes A.posture B.clapping C.eye contact D.all of the above

*asked on October 13, 2016* -
## physics

which ball has more energy a 5 kg ball rolling at 4 m/s or a 6 kg ball rolling at 3 m/s?

*asked on October 7, 2016* -
## Math

All students in Peter's class have $1.05, consisting of nickels and/or dimes and/or quarters. Each student has a different combination of coins, and all possible combinations of coins are included. What is the probability that Peter is unable to give his

*asked on September 21, 2016* -
## Math

All students in Peter's class have $1.05, consisting of nickels and/or dimes and/or quarters. Each student has a different combination of coins, and all possible combination of coins are included. What is the probability that Peter is unable to give his

*asked on September 21, 2016* -
## science

What is the molarity of a solution of sodium chloride which contains 0.5moles in 200cubic centimeters? #2.what volume of 1m solution of hcl will contain 10moles?

*asked on August 2, 2016* -
## physics

a helium atom is in one of its single states.one of the electrons is in an p-state and the other a D-sate.the atom is placed in a magnetic field,B,of strengh 3 tesla. sketch a diagram showing the degenerated states and all permissible transition from

*asked on April 27, 2016* -
## Hamlet

How does Hamlet show his Heroism?

*asked on April 17, 2016* -
## math

in an experiment, it was found that 70 out of 800 animals were happy in their surroundings. a find probability that an individual animal is happy in their surroundings. b. represent as a percent

*asked on March 17, 2016* -
## math

a box contains seven red marbles, five green marbles & eight blue marble. a marble is drawn at random & is replaced. a second marble is then draw from the jar. find the probabilty that both marbles are green

*asked on March 17, 2016* -
## math

4 red marbles, 3 green, 2 yellow. you pick 2 at random.What is probability of a. 1 yellow & 1 red b. 2 green

*asked on March 17, 2016* -
## math

a box contains seven red marbles, five green marbles & eight blue marble. a marble is drawn at random & is replaced. a second marble is then drawn from ther jar. find the probabilty that the first marble is red & second is green

*asked on March 17, 2016* -
## Descriptive Physics

You are standing 5 feet from one speaker and 14 feet from another. Both speakers are producing the same sound. If the combined sound from both speakers is especially loud at your location, which of the following could be the wavelength of the sound? Choose

*asked on March 13, 2016* -
## math

I am a number less than 3,000.When you divide me by 32, my remainder is 30. When you divide me by 58, my remainder is 44. What number am I.

*asked on January 13, 2016* -
## physics

Pure helium is closed into cylinder with a movable piston. The initial volume, pressure, and temperature of the gas are 15 dm3, 2·105 Pa, and 300 K, respectively. If volume is decreased to 12 dm3 and the pressure increase to 3.5·105 Pa find the final

*asked on January 11, 2016* -
## physics

A police car siren emits a sound wave with a frequency fs = 400 Hz and it is moving toward the wall at 25 /m/s. What frequency reflected from the wall does the driver of the police car hear ? The speed of sound is 340 m/s.

*asked on January 11, 2016* -
## math

Dee used 2 1/3 cups of sugar for a cake recipe.If the amount of sugar the container holds is 3 times the amount she used,does the container hold more than,less than,or equal to 3 cups of sugar

*asked on December 3, 2015* -
## math

Derek ran 3/8 of a race he had to stop for a break.If the race is 6 miles long,did Derek run more than,less than,or equal to 6 miles before he took a break?

*asked on December 3, 2015* -
## math

Maresol spent 4/5 of her allowance on a pair of jeans.If she received $15 for allowance,did Maresol spend more than,less than,or equal to $15 on the jeans?

*asked on December 3, 2015* -
## Physics

A ball with a mass of 4 kg and a velocity of 10 m/s strikes an 8kg ball that is initially at rest. If the collision is perfectly elastic, what are the velocities of the 4 kg and 8 kg ball after the collision?

*asked on December 2, 2015* -
## math

maresol spent 4/5 of her allowance on a pair of jeans.if she received $15 for allowance,did maresol spend more than,less than,or equal to 3 cups of sugars?explain

*asked on December 2, 2015* -
## Math

A train leaves San Diego at 1:00 PM. A second train leaves the same city in the same direction at 4:00 PM. The second train travels 78 mph faster than the first. If the second train overtakes the first at 6:00 PM, what is the speed of each of the two

*asked on December 2, 2015* -
## Algebra

a farmer fences off a small.rectangular plot of land thay is 60 feet by 100 feet. within that area, a garden is planted and surrounded by a walkway of uniform width. how wide is the walkway if the area of the planted area is one half of the area of the

*asked on December 1, 2015* -
## math

How can x-8 be modeled by being described as a situation? Answer:8x

*asked on November 11, 2015* -
## Finance

Problem 10-32 Project Evaluation [LO1] Aria Acoustics, Inc. (AAI), projects unit sales for a new seven-octave voice emulation implant as follows: Year Unit Sales 1 86,000 2 99,000 3 113,000 4 108,000 5 89,000 Production of the implants will require

*asked on November 7, 2015* -
## Math

A bag contains 5 red, 7 yellow, 8 green, and 3 blue markers. What is the p(two green markers) will be chosen if the markers are not replaced as they are chosen?

*asked on September 1, 2015* -
## calculus

A snowball is melting at the rate of 2 inches per hour. How fast is the surface area of the snowball changing at the instant the snowball has a radius of 3 inches i tried (d/dt) = 4pir^2 (dr/dt) its multiple choice and -72pi isnt there so im just trying to

*asked on August 28, 2015* -
## Physics

Which one of the following actions would make the maxima in the interference pattern from a grating move closer together? A.Increasing the distance to the screen. B.Increasing the number of lines per length. C.Decreasing the number of lines per length.

*asked on August 11, 2015* -
## BUSINESS STUDIES

Q1.With the aid of a diagram discuss the marketing systems Q2.Discuss the problems that occur when universities and industry form joint ventures for research purposes.How have these problems been solved?

*asked on July 8, 2015* -
## chemistry

under what conditions could the decomposition of Ag2O(s) into Ag(s) and O2(g) proceed spontaneously at 298 K? 2Ag2O(s)---->4Ag(s)+O2(g) dG=22.42 Kj answer= 0.000118 atm.

*asked on May 9, 2015* -
## chemistry

dG for the formation of Hi(g) from its gaseous elements is -20.2 kj/mol at 500k. when the partial pressure of HI is 10 atm, and I2 0.001 atm, what must the partial pressure of hydrogen be at this temperature to reduce the magnitude of dG for the reaction

*asked on May 9, 2015* -
## college chemistry

at its melting point, O c, the enthalpy of fusion of water is 1.435 kcal/mol. what is the molar entropy change for the melting ice at 0C? answer: 5.26 cal/mol-k

*asked on May 9, 2015* -
## college chemistry

for the reaction at 298 K 2A+b ---->C enthalpy=100 K/cal entropy= 0.050 kcal/k assuming enthalpy and entropy to be constant over the temperature range, at what temperature will the reaction become spontaneous? answer: T>2000K

*asked on May 9, 2015* -
## college chemistry

estimate the normal boiling point of Pcl3 answer: 333 K how do you get it?

*asked on May 9, 2015* -
## Chemistry

Check my work & answer please. I need to make sure I am able to do this type of problem correctly. A typical car engine produces 44,000 kJ of heat in an hour. The cooling system has a capacity of 8.40 L and is filled with a 50:50 mixture of anti-freeze

*asked on April 19, 2015* -
## Chemistry

4. A typical car engine produces 44,000 kJ of heat in an hour. The cooling system has a capacity of 8.40 L and is filled with a 50:50 mixture of anti-freeze (specific heat capacity of 8.37 J/g-oC, density of 1.038 g/mL). In maintaining a constant engine

*asked on April 18, 2015* -
## Physics

A 1100- kg car collides with a 1400- kg car that was initially at rest at the origin of an x-y coordinate system. After the collision, the lighter car moves at 20.0 km/h in a direction of 25 o with respect to the positive x axis. The heavier car moves at

*asked on April 16, 2015* -
## GEOMETRY

cASEY SIGHTS THE TOP OF AN 84 FOOT TALL LIGHTHOUSE AT AN ANGLE OF ELEVATION OF 58 DEGREE. IF CASEY IS 6 FEET TALL, HOW FAR IS HE STANDING FROM THE BASE OF THE LIGHTHOUSE. I DO NOT UNDERSTAND WHAT IS ANGLE OF ELEVATION CAN YOU SHOW ME AN EXAMPLE PLEASE

*asked on April 12, 2015* -
## Calculus

Suppose that y=f(x) = sqrt(2x), x>=0 Find a c > 0 such that the tangent line to the curve y = f(x) at x = c has the same slope as the tangent line to the curve y = f^–1(x) at x = c. You get: c = 1/8 c = 1/2 c = (1/8)^(1/3) c = (1/3)^(2/3) c = (1/2)^(1/3)

*asked on April 9, 2015* -
## Calc AB

Let f(x) = (x+3)^3 + 2. The graph of the inverse function y = f^–1(x) has a vertical tangent at: (Hint: Think about the symmetry of the 2 graphs.) (66, 1) (2, –3) (10, –1) (–3, 2) (–1, 10)

*asked on April 9, 2015* -
## Math

Suppose f(x) = 4x^5-(1/x^4) Find the slope of the tangent line to the graph of y = f^–1(x) at (3, 1). You get: 1/24 1/16 00062 1620 972

*asked on April 9, 2015* -
## Calc AB

Suppose that f(x) is an invertible function (that is, has an inverse function), and that the slope of the tangent line to the curve y = f(x) at the point (2, –4) is –0.2. Then: (Points : 1) A) The slope of the tangent line to the curve y = f –1(x) at

*asked on April 9, 2015* -
## Math

Suppose f(x) = sin(pi*cosx) On any interval where the inverse function y = f –1(x) exists, the derivative of f –1(x) with respect to x is: a)-1/(cos(pi*cosx)), where x and y are related by the equation (satisfy the equation) x=sin(pi*cosy)

*asked on April 9, 2015* -
## Calc AB

Suppose that y = f(x) = x^2-4x+4 Then on any interval where the inverse function y = f^–1(x) exists, the derivative of y = f^–1(x) with respect to x is: a) 1/(2x-4) b) 1/(2y-4), where x and y satisfy the equation y=x^2-4x+4 c)(1/2)x^(-1/2)

*asked on April 9, 2015* -
## Calculus AB

For the function f(x) = sqrt(9-x), which is equal to d/dx(f-1( -1 is the inverse)(x)) a) -2x b) sqrt(x) + 9 c) x^2 + 9 d) 2x e) 9-x^2

*asked on April 9, 2015* -
## Calculus

For the function f(x) = x^2 - 4x +5, x>= 2, which is equal to d/dx (f-1 this is the inverse)(x)) ? 1/(2y-4) where x and y are related by the equation (satisfy the equation) x=y^2-4y+5 x>= 1 2y-4 where x and y are related by the equation y= = x^2 - 4x +5,

*asked on April 9, 2015* -
## Calc AB

Remember that f(x) must be one-to-one (only one y-value for each x-value) over the domain where f –1(x)is defined as a function. So, in some cases you must restrict the domain of f(x) so that it's one-to-one. There might be more than one section of

*asked on April 9, 2015* -
## Calc

Find the area of the region bounded by the curves y2 = x, y – 4 = x, y = –2, and y = 1. So far I have found that the area of the trapezoid which is 13.5. But for the other two areas I cannot find them. They could be: 27/2 22/3 33/2 34/3 14 I believe

*asked on April 9, 2015* -
## Physics

A rock is thrown directly upward from the edge of the roof of a building that is 35.3 meters tall. The rock misses the building on its way down, and is observed to strike the ground 4.00 seconds after being thrown. Neglect any effects of air resistance.

*asked on March 21, 2015* -
## science

Measuring the speed of light through gelatin using a laser

*asked on March 4, 2015* -
## algebra

Use the formula d = 1.22ãx to estimate how many miles a 5-foot-tall person can see standing on the deck of a ship that is 50 feet above the ocean.

*asked on February 9, 2015*