# Lucas

Most popular questions and responses by Lucas-
## TX History Help Please

Why did many Texans become concerned after Abraham Lincoln was elected president? a.They were afraid Sam Houston would start a revolution b.They were afraid slavery would be abolished c.They were afraid taxes would increase. d.They were afraid the South

*asked on December 4, 2017* -
## Math

The sum of two numbers is 82. The difference is 16. What are the two numbers?

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

A 75 g bungee cord has an equilibrium length of 1.20 m. The cord is stretched to a length of 1.80 m, then vibrated at 20 Hz. This produces a standing wave with two antinodes. What is the spring constant of the bungee cord?

*asked on February 25, 2010* -
## Math

A sphere's radius expands from 1.0m to 1.1m. Using differentials, what is the change in the volume of the sphere (in m3)? The volume of a sphere is given by V=4/3∏r3.

*asked on November 22, 2018* -
## PHYSICS

The electron gun in a television tube uses a uniform electric field to accelerate electrons from rest to 5.0×107 m/s in a distance of 1.2 cm. What is the electric field strength?

*asked on February 24, 2010* -
## math urgent please

A fish tank in the shape of a cuboid has length 320 cm. Its length is twice that of its width. To enhance viewing, the area of the four vertical faces should be maximized. Find the optimum "viewing area" of a fish tank that is fixed to the wall so that the

*asked on September 3, 2014* -
## math

A farmer has 110 metres of fencing to fence off a rectangular area. Part of one side is a wall of length 15m. Find the dimensions of the ﬁeld that give the maximum area. Answers: length and width = 31,25m Thank you so much for a huge help.

*asked on October 22, 2013* -
## algebra

4(7x-4) =124

*asked on January 15, 2016* -
## math

A company's weekly profit, in riyals, is modeled by the function P(u)=-0.032u^2+46u-3000. where u is the number of units sold each week. a) the maximum weekly profit. Answer: 13531.25 riyals b) the loss for week's holiday period, where no units are sold

*asked on October 24, 2013* -
## Math

You run a small furniture business. You sign a deal with a customer to deliver up to 500 chairs, the exact number to be determined by the customer later. The price will be $120 per chair up to 400 chairs, and above 400 the price will be reduced by $0.25

*asked on May 4, 2016* -
## PHYSICS

An electron iwth an initial speed of 500,000 m/s is brought to rest by an electric field. (a) Did the electron move into a region of higher potential or lower potential? (b) What was the potential difference that stopped the electron?

*asked on February 25, 2010* -
## chemistry

A chemistry student weighs out 0.172 grams of acrylic acid (HCH2CHCO2) into a volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800 moles/liter NaOH solution. Calculate the volume of NaOH solution the

*asked on January 25, 2012* -
## Math

In an arithmetic progression, the 5th term is six times the 1st term and the sum of the first six terms is 99. Find the 1st term and the common difference. Attempt at solution: U5 = 6(U1) 99 = 3(2[U1] + 2d)

*asked on November 24, 2017* -
## Math

In a group of 105 students, 70 students passed Mathematics, 60 students passed History and 45 students passed Geography; 30 students passed Mathematics and History, 35 students passed History and Geography, 25 passed Mathematics and Geography, and 15

*asked on January 24, 2014* -
## biology

What does the word cycle tell you about the chemical reactions of the Calvin cycle?

*asked on November 5, 2014* -
## chemistry

Arrange the species O2, O2^+, O2^-, and O2^2- in order of increasing O-O bond length.

*asked on March 4, 2012* -
## PHYSICS

A heavy piece of hanging sculpture is suspended by a 90 cm long, 5.0 g steel wire. When the wind blows hard, the wire hums at its fundamental frequency of 80 Hz. What is the mass of the sculpture?

*asked on February 25, 2010* -
## math

A rocket follows a parabolic trajectory. After t seconds, the vertical height of the rocket above the ground, in metres, is given by H(t) = 37t – t . Find the length of time the rocket is in the air. Could you please explain me, why answer is 37s? Thank

*asked on October 24, 2013* -
## Math

You run a small furniture business. You sign a deal with a customer to deliver up to 500 chairs, the exact number to be determined by the customer later. The price will be $120 per chair up to 400 chairs, and above 400 the price will be reduced by $0.25

*asked on May 5, 2016* -
## physics

One simple model for a person running the 100m dash is to assume the sprinter runs with constant acceleration until reaching top speed,then maintains that seed through the finish line.if sprinter reaches his top speed of 11.1m/s in 2.54s. What will be his

*asked on September 16, 2015* -
## Math

You run a small furniture business. You sign a deal with a customer to deliver up to 500 chairs, the exact number to be determined by the customer later. The price will be $120 per chair up to 400 chairs, and above 400 the price will be reduced by $0.25

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

An arithmetic series has first term -50 and common difference 4. How many terms are in the series so that the sum of the series first exceeds 100?

*asked on November 24, 2017* -
## Maths

An arithmetic and a geometric sequence have the same first terms.(2)....and the same second term say X..The sum of the first 3 terms of the arithmetic sequence equals to the third term of the geometric sequence.Calculate the first 3 terms of each sequences

*asked on February 3, 2013* -
## Math

An oil rig breaks and begins to leak oil into the arctic ocean at an increasing rate of R(t) = 20t + 20 litres per day. At the instant of breakage (t=0), 100 litres of oil was spilled into the ocean via the emergency release valve. What is the equation

*asked on November 23, 2018* -
## Maths

1..The first 2 terms of a geometric progression are the same as the first two terms of an arithmetic progression.The first term is 12 and is greater than the second term.The sum of the first 3 terms od the arithmetic progression is 4/3 less than the sum of

*asked on February 3, 2013* -
## math

Two students, Mary and John, play a game. Each time Mary passes “start” she received $25. Each time John passes “start” he receives 15% of the amount he already has. Both students start with $200. a. How much money will Mary have after she has

*asked on August 27, 2014* -
## Math

A swimming pool is in the shape of a cuboid with dimensions 50 metres long by 25 metros wide by 2.5 metres deep. If the pool is completely filled with water, calculate a) the volume of water in the pool b) the longest straight distance a swimmer could swim

*asked on April 28, 2014* -
## math

In a group of 105 students, 70 students passed Mathematics, 60 students passed History and 45 students passed Geography; 30 students passed Mathematics and History, 35 students passed History and Geography, 25 passed Mathematics and Geography, and 15

*asked on January 23, 2014* -
## math

A company's weekly profit, in riyals, is modeled by the function P(u)=-0.032u^2+46u-3000. where u is the number of units sold each week. a) the maximum weekly profit b) the loss for week's holiday period, where no units are sold c) the number of units sold

*asked on October 22, 2013* -
## algebra

A rectangular prism has a volume of 750 cubic millimeters. Its length is 15 millimeters, and its width is 10 millimeters. What is its height

*asked on May 7, 2012* -
## science

find the angle of elevation of a gun that fires a shell with a muzzle velocity of 120m/s and hits a target on the same level but 1300m distant.

*asked on February 16, 2016* -
## English- Lord of the Flies

CHAPTER 7 (#1)- When the boar charges, what does ralph do? (#2)-What part does civilization play in dictating a need for good grooming?

*asked on September 28, 2008* -
## algebra

1/4 times 1/2 = 4d

*asked on January 29, 2019* -
## Math

kyle just started a new job that pays $7 per hour. He had been making $5 per hour at his old job. Kyle worked a total of 54 hours last month and made $388 before deductions. How many hours did he work at his new job?

*asked on December 9, 2010* -
## Math

The exchange rate from US dollars (USD) to euros (EUR) is given by 1 USD = 0.753 EUR. Give the answers to the following correct to two decimal places. Roger receives 800 Australian dollars (AUD) for 610 EUR. Calculate the value of the US dollar in

*asked on August 27, 2014* -
## math

On the first day he runs 1.5 km. Every day he runs 10% more than the day befor. a) Write down the distance he runs on the second day of training. ..... 1,5km +0,15 = 1,65 km b) Calculate the total distance He runs in the first seven days of training. When

*asked on February 22, 2014* -
## math statistic

In Megabucks, a player who correctly chooses five out of the six winning numbers gets $400. What is the probability of winning $400? Answer is 0.0000924 in the book but I really don't know where I'm doing mistake. my work is = 6!/5!(1!) combination Thank

*asked on October 5, 2015* -
## math

A company's weekly profit, in riyals, is modeled by the function P(u)=-0.032u^2+46u-3000. where u is the number of units sold each week. a) the maximum weekly profit. Answer: 13531.25 riyals b) the loss for week's holiday period, where no units are sold

*asked on October 23, 2013* -
## geometry

A tetrahedron is a triangular pyramid in which each face is an equilateral triangle. Calculate the volume of a tetrahedron that has all its edges 6 cm in length. Hint: You will need to know some geometry and trigonometry.

*asked on May 15, 2012* -
## Science

A microwave oven supplies 1.000kj per second.how many min should be set on the microwave in order to heat 250.g of water from 24.3 degrees c to its boiling point?

*asked on February 25, 2016* -
## materials bahavior

A specimen has an initial diameter of 200mm and a length of 700mm. At a stress of 40MPa and a temperature of 538oC the steady state strain rate is about 2×10−4% per hour. Find the primary creep elongation and the steady state creep elongation after 5000

*asked on December 7, 2015* -
## Algebra

The Smiths invested $14,000, part at 3% simple interest and the rest at 4% simple interest for a period of one year. if the total interest earned was $460, how much was invested at each rate?

*asked on October 27, 2015* -
## physics

football is kicked off with an initial speed of 66 ft/s at a projection angle of 45 degrees. A receiver on the goal line 63 yd away in the direction of the kick starts running to meet the ball at that instant. What must be his minimum speed (in

*asked on September 30, 2013* -
## 5th grade math

How do you find the dimensions of a box that hold 2xs as many cubes as a box that is 2 by 3 by 4?

*asked on May 12, 2014* -
## Math

Train A and train B leave station going in opposite directions. Train B leaves 1/2 later than train A. Train B travels 80km/h faster than Train A. In 2 hours the trains are 3200KMs apart. How fast is each train traveling.. thank you

*asked on October 16, 2007* -
## Maths

Eric thinks of 2 sequences.One is geometric and the other arithmetic.Both sequences start with the number 3.The common ratio of the geometric sequence is the same as the common difference of the arithmetic sequence.If the 6-th term of the geometric

*asked on February 3, 2013* -
## Math

Find the minimum number of terms in the geometric series 10 + 8 + 32/5 + ... such that the sum is greater than 49.

*asked on November 24, 2017* -
## College Algebra II

A patient’s cost for a hospital stay is determined as follows: Admission = $50 Room charge: first night: $1000 nights 2-4: $1500 per night night 5 and beyond: $2000 per night Surgery: $8500 per surgeon, plus $3000 for an anesthesiologist (a) What would

*asked on July 18, 2015* -
## math

A farmer has 110 metres of fencing to fence off a rectangular area. Part of one side is a wall of length 15m. Find the dimensions of the ﬁeld that give the maximum area. Thank you so much for a huge help.

*asked on October 22, 2013* -
## Calculus

A rancher wants to make an animal pen by fencing in an area of 2500000 square feet in a rectangular field and then divide it up with 5 fences down the middle parallel to one side. The rancher wants to use the shortest total length of fencing possible. If

*asked on April 30, 2013* -
## Maths and science

The sum of the first n terms of a sequence is given by 4-4(1/2)^n.calculate the first 3 terms

*asked on February 3, 2013* -
## Math

kyle just started a new job that pays $7 per hour. He had been making $5 per hour at his old job. Kyle worked a total of 54 hours last month and made $388 before deductions. How many hours did he work at his new job?

*asked on December 9, 2010* -
## english

lord of the flies - what does ralph daydream about in chapter 7

*asked on September 28, 2008* -
## chemistry

What would happen if MnO2 was mixed with KBrO3 ND 9 M sulfuric acid?

*asked on February 11, 2012* -
## math

Write two other ratios equal to 9/12?

*asked on March 24, 2011* -
## chemistry

An element has an ion with +2 charge.It has 38 electrons and 51 neutrons. write the nuclear symbol for the element.

*asked on August 11, 2010* -
## Maths

Thato caught 4 snails and placed them all in the same small circle on the ground and organised a race......1st snail travelled 24cm in 4minutes,2nd snail travelled 35 cm in 7minutes,3rd snail travelled 33cm in 5minutes and the 4th snail travelled 39cm in

*asked on February 6, 2013* -
## geometry

The sector shown is formed into a cone by joining its two radii. Calculate the volume of the cone correct to the nearest whole number. It shows a diagram with a 240 degree sector or two-thirds of a circle with a radius of 12 cm. How do I do this? Thank you

*asked on May 15, 2012* -
## chemistry

3Ag(s)+4HNO3(aq)-->3AgNO3(aq)+NO(g)+2H2O(l) Write the new ionic equation.

*asked on February 17, 2012* -
## physics

A 2.000-kg particle rests on a frictionless horizontal surface and is attached to the free end of a spring. The particle is pulled horizontally so that it stretches the spring 0.05 m and is then released from rest at t = 0. Determine the displacement, x,

*asked on May 5, 2010* -
## Geometry

If each of the sides of an isoceles triangle is 5 x the size of the baseline and the perimeter of the triangle is 121 cm, how many centimeters is each of the sides of the triangle? I have the sides at 50 cm and the base at 21cm. ?

*asked on January 24, 2017* -
## Maths

A rectangular room 8m long by 5m wide contains 129m square of air. Calculate the height of the room. I assume that the above question is a trick question. Since the room is 8m high, it then goes that the height I 8metres. Thank you.

*asked on April 23, 2016* -
## Algebra 2 (Math)

Solve by the system of equations by substitution. x + 2y + z = 14 y = z + 1 x = -3z + 6 Anyone able to help me with this? I've been stuck on it all day and can't seem to solve it, it doesn't make any sense to me.

*asked on November 19, 2015* -
## math

This year Gloria's garden is one foot wider and three feet shorter? What were the dimensions of the garden last year?

*asked on September 18, 2015* -
## Math

An individual federal tax return form asks, among other things, for the following information: income (in dollars and cents), number of dependents, whether filing singly or jointly with a spouse, whether or not deductions are itemized, amount paid in local

*asked on September 12, 2015* -
## Math

ln(y-9)-ln7=x+lnx Thank you sooo much for helping:))))

*asked on August 8, 2015* -
## Physics

There are 2 objects connected with ideal, massless string that is hanging over an ideal (massless and frictionless) pulley. The angled surface is at a 25.0 degree angle. All surfaces are firctionless. A force F1 is applied horizontally as shown to the

*asked on October 9, 2014* -
## Math

Claire wants to determine how brightly to illuminate her stage. stage width (in metres) x stage length (in metres) x 0.14 = total watts for stage If her stage is 7.25 metros wide and 11.5 metres long, a) calculate the exact number of watts needid to

*asked on May 4, 2014* -
## math

Claire wants to determine how brightly to illuminate her stage. stage width (in metres) x stage length (in metres) x 0.14 = total watts for stage If her stage is 7.25 metros wide and 11.5 metres long, a) calculate the exact number of watts needid to

*asked on May 3, 2014* -
## math

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is

*asked on April 28, 2014* -
## math

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is

*asked on April 28, 2014* -
## Math

A 12 cm by 12 cm ice cube tray is in the shape of a cuboid with twelve hemispheres inset. The depth of each hemispheres is 1 cm. a) If all the hemispheres were filled with water, calculate the total volume of water that the ice cube tray could hold. It is

*asked on April 27, 2014* -
## math

10t-640/t^2 = 0 Thank you so much for huge help:)))

*asked on April 9, 2014* -
## LECTRICAL ENGINEERING

WHAT IS THE FORMULAR FOR CALCULATING THERMAL ENERGY WHEN GIVEN CURRENT,VOLTAGE,TIME,TEMPERATURE

*asked on March 6, 2014* -
## math

The graph of the function f(x)=2^x/a passes through the points (0,b) and (2,0.8). Calculate the values of a and b. Thank you so much for huge help:)))

*asked on November 10, 2013* -
## physics

Suppose that it takes exactly 17.0 hr to drain a container of 6.20 liters of water. What is the average mass flow rate (in kilograms/second) of water from the container? Assume that the density (mass/volume) of water is exactly 1 g/cm^3.

*asked on September 9, 2013* -
## Maths

In a quadratic sequence.....Term 2 is 11,Term 4 is -7,term 7 is -64....determin the general term for the sequence

*asked on February 26, 2013* -
## Maths-financial

Ted needs to take out a loan to buy a new bicycle.He is able to repay the loan by means of 15 semi-annual payments of R2500,starting in 6months from now,when interest is 16% p.a compounded quartely.Calculate the amount of the loan

*asked on February 19, 2013* -
## Maths

Determine how long in years it will take the value of a motor vehicle to decrease to 25% of its original value if the rate of depreciation based on the reducing balance method is 21% per annum?

*asked on February 7, 2013* -
## ferreira

i need helo with this poem for sci that is about chlorine can some one help me

*asked on December 12, 2012* -
## chemistry

I^- H5IO6 BrO2 HClO I2 Which could not disproportionate?

*asked on February 19, 2012* -
## AP Physics

A car slows down from 18 m/s to rest in a distance of 91 m. What was its acceleration, assumed constant?

*asked on March 25, 2011* -
## Chem

Using condensed electron configurations, give reactions showing the formation of the common ions of the following elements. (Type your answers in the following order. In the first box enter your answer using the format [Ar] 4s2 3d10 4p2 for [Ar]4s23d104p2.

*asked on October 10, 2010* -
## chemistry

The molecular structure around the oxygen in water is ? The molecular structure around all the carbons in ethanol is ?

*asked on February 4, 2008* -
## Physical Science

What steps should we use to prevent the soil from eroding while we are letting the soil dry?

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

I am writing an intro paragraph for comparing and contrasting private schools and public schools. NEED HELP!!

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

using each digit 0-9 exactly once to complete addition problem where answer is four digits.

*asked on January 19, 2017* -
## Math-Direct Variation

can you please show me how to set this up? The variables x and y vary directly. When x is 3, y is 6. Find x when y = 2/3

*asked on August 12, 2016* -
## Math

How do you DO THIS? 4+8+12+16+20... +392+ 396+ 400?

*asked on February 5, 2016* -
## input output

I'm in 12th grade. But I find this 6th grade problem a !@#$%^&ALLENGING. X: 4 12 Blank Blank Y: 6 18 Blank 60 Someone please solve this. Like.. WHAT. (Solve the blanks)

*asked on January 26, 2016* -
## science

What is the name for the coil of wire around a ferromagnetic material?

*asked on January 22, 2016* -
## math

Find two values defining tails of the normal distribution with an area of 0.05 each. Thank you so much for huge help:))

*asked on November 23, 2015* -
## physics

A 8.74-kg hanging weight m2 is connected by a string over a pulley to a 5.00-kg block m1 that is sliding on a flat table. If the coefficient of kinetic friction is 0.190, find the tension in the string.

*asked on September 28, 2015* -
## Math

Write an equation for the hyperbola. Vertices at ( -5,2) and (-1,2), passing through the point (-6,4) Could you be so nice and help me please:) I have still wrong answer and I have no idea where I'm doing mistake. My work: Horizontal transverse )( Center

*asked on August 23, 2015* -
## English

I'll bet you can't guess my favorite musical instrument challenged my dentist

*asked on April 14, 2015* -
## math

If 1mechanic can do 4 machines in 6 hours how many machines can 48 mechanics do in 160 hours?

*asked on September 7, 2014* -
## math

Peter has a cylindrical block of wood od diameter 6 cm and height 18 cm. He glues the base to a board, but wants to paint the rest of the block. He wants to paint the bottom half of the wood black and the top half white. a) Calculate the surface area of

*asked on May 5, 2014* -
## Math

Peter has a cylindrical block of wood od diameter 6 cm and height 18 cm. He glues the base to a board, but wants to paint the rest of the block. He wants to paint the bottom half of the wood black and the top half white. a) Calculate the surface area of

*asked on May 5, 2014* -
## math urgent please

Petr has a cylindrical block of wood od diameter 6 cm and height 18 cm. He glues the base to a board, but wants to paint the rest of the block. He wants to paint the bottom half of the wood black and the top half white. a) Calculate the surface area of the

*asked on May 4, 2014* -
## Math

two functions are defined as follows: f(x)=3/x+1 and g(x)=x-6 a) Write the equations of the vertical and horizonal asymptotes of f. b) Determine the coordinates of the points where f(x) = g(x) Thank you so much for huge help Is ti correct please? answer

*asked on May 3, 2014*

## Pages

**1**- 2