# ken

Newest questions and responses by ken-
## Math

if 8000 is invested in a long-term trust fund with an interest rate of 5% compounded continuously what is the amount of money in the account after 15 years?

*asked on January 10, 2019* -
## history

How did Mexican Cession shape the growth of the United States? (Select all that apply.) a. It promoted migration west. b. It promoted cultural hegemony. c.It eliminated nationalism. d. It spread Christianity.

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

A cone is inscribed in a sphere of diameter 32 cm. Angle between height and slant height of the cone is 30. Find the volume of the cone

*asked on November 29, 2018* -
## Math

Given A = (7, 1, 3), C = (4, -2, 3), B = (5, 1, 2), and D = (6, m, n), find m and n so that segments BD and AC have the same midpoint. Is ABCD a parallelogram? Please help!

*asked on November 29, 2018* -
## Math

If trapezoids have the same area, would they always have the same perimeter?

*asked on November 28, 2018* -
## Math

One spinner has two sections. They are marked A and B . Another spinner has four sections. They are marked 1 , 2 , 3 , and 4 .

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

An object moving with uniform acceleration has a velocity of 13.0 cm/s in the positive x-direction when its x-coordinate is 2.73 cm. If its x-coordinate 2.95 s later is −5.00 cm, what is its acceleration? cm/s^2 Express the position of the object in

*asked on March 21, 2018* -
## pre algebra

matthew mixes pretzels that sell for $1.50 a pound with cereal that sells for $3.00 per pound. he wants to make 12 pounds of mixture to sell for $2.00 a pound. how many pounds of each should he use?

*asked on February 9, 2018* -
## MATH

The solution below corresponds to an inequality involving a quartic function. Write a possible quartic polynomial inequality that matches the solution. Prove that your inequality matches the solution. x < 4 and x > 7

*asked on January 6, 2018* -
## math

Trig Identities prove sinx+1 \ 1-sinx = (tanx+secx)^2

*asked on January 3, 2018* -
## physics

Town A lies 20 km north of town B. Town C lies 13 km west of town A. A small plane flies directly from town B to town C. What is the displacement of the plane.

*asked on September 13, 2017* -
## Physics

Town A lies 20 km north of town B. Town C lies 13 km west of town A. A small plane flies directly from town B to town C. What is the displacement of the plane. Please explain how you got the answer

*asked on September 13, 2017* -
## Solid mensuration

the circumference of a cirle is pi meter. how long is the side of the largest square that can be cut from the circle

*asked on September 10, 2017* -
## math

Reduce the sum to lowest term possible 7/15+7/15+2/15

*asked on July 12, 2017* -
## mathematics

a car travelled 100km in 8hours and the remaining 40km in 2hours.find the average speed

*asked on May 31, 2017* -
## mathematics

a car travelled 100km in 8hours and the remaining 40km in 2hours.calculate the average speed

*asked on May 31, 2017* -
## geometry

What is the area of a sector with a central angle of 210 degrees and a diameter of 4.6 m?

*asked on May 3, 2017* -
## Physics

A car mass of 950 kg is initially travelling at 60km/h. Determine the final speed of the car when the speed increases so that it's kinetic energy increased by 165 kJ.

*asked on April 26, 2017* -
## Into to com

Analyze how language functions in the video “Power of Words.” What makes this video so effective in illustrating the various principles of verbal communication? Can you think of a real life situation where the specific words you choose can radically

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

A flower displays contains tulips, roses, and carnations. For every 10 tulips, there are 4 roses and 6 carnation. The display contains 100 flowers. How many of the flowers are tulips?

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

How much pure acid must be added to 2 liters of a 10% solution of acid to obtain a mixture that is 20% acid?

*asked on January 17, 2017* -
## ALGEBRA 2

Find the function rule for g(x). The function f(x) = x2 . The graph of g(x) is f(x) translated to the right 8 units and down 7 units. What is the function rule for g(x)?

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

The volume of a sample of a gas collected over water at 32 Celsius and 752 torr is 627 ml. What will the volume of the gas be when dried and measured at STP? (Vapor pressure of water at 32 Celsius = 35.7 torr)

*asked on December 6, 2016* -
## physics

An automobile accelerates from rest at 0.9 m/s 2 for 25 s. The speed is then held constant for 18 s, after which there is an acceleration of −5.8 m/s 2 until the automobile stops. What total distance was traveled? Answer in units of km

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

What volume of 17 M sulfuric acid must be used to prepare 0.15 L of 1.78 M H2SO4?

*asked on October 18, 2016* -
## Physics

An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel 1530 m/s in seawater. How deep is the water directly below the vessel if the time delay of the echo to the ocean floor and back is 7 s? Answer in units of m. Is it

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

A projectile is fired with an initial muzzle speed 190 m/s at an angle 60 from a position 5 meters above the ground level. Find the horizontal displacement from the firing position to the point of impact. I know that y=vsin(60)t-.5gt^2 and x=vcos(60)t. but

*asked on September 23, 2016* -
## math

Factoring: differences of cubes 9a^2-16

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

What two numbers multiple to get 64, but add to get -16 ? Is the answer prime

*asked on September 12, 2016* -
## Physics

John walks 5m south and 5m west. Calculate john's distance and displacement from the starting point.

*asked on July 8, 2016* -
## Math

Solve the inequality. [( 2x^2+5x-3 ) / (x^2 -8x+ 16) ] >= 0 I factored out the bottom to (X-4)(X-4). The top should be 2(x+ ? )(x- ?). What would I do next to finish the problem?

*asked on May 9, 2016* -
## math

The demand function for a product is p=20−5q where p is the price in dollars when q units are demanded. Find the level of production that maximizes the total revenue and determine the revenue. q= units R= $

*asked on March 14, 2016* -
## math

The length of a rectangle is three more than twice its width. Its perimeter is 24 inches. Find its dimensions length and width.

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

The density function for a femur can be modeled as ρ(x)=80+πcos(πx)+3x grams per centimeter, −25≤x≤25. (a) Calculate the total mass of a femur. (b) Find the center of mass of a femur.

*asked on February 21, 2016* -
## Physics

A merry-go-round is a common piece of playground equipment. A 6.42m diameter merry-go-round with a mass of 648.0kg is spinning at 39.4rpm. John runs tangent to the merry-go-round at 6.36m/s, in the same direction that it is turning, and jumps onto the

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

Let f(t)=t^(2)+5t+2. Find a value of t such that the average rate of change of f(t) from 0 to t equals 11. t=

*asked on January 21, 2016* -
## Maths

i'm thinking of a number that has two tenths, twice as many hundredths as tenths, half as many hundreds as tenths, twice as many tens as hundreds and three times as many ones as hundredths. Can you Guess the number

*asked on January 19, 2016* -
## MAth GCF LCM

25 square floor mats in a gymnasium are connected together to form a large square area of 22500 cm². What is the length of the side of each square floor mat?

*asked on January 6, 2016* -
## math

A box contains 18 marbles, 8 red, 4 green, & 6 white. What is the smallest number of marbles that must be selected to have one of each color marble?

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

Over the past week, 34 baby boys were born at the hospital. This was 54% of all babies born. How many girls were born over the past week?

*asked on November 20, 2015* -
## Trig right triangle

A ship leaves port at 6 am and heads due east at 20 knots. At 10 am, to avoid a storm the ship changes course to N 47°. Find the ships distance from port at 4 pm.

*asked on November 17, 2015* -
## Math

Just learned log rules and I don't get it. How do you solve log5x^2 + 4log5x = 12 ? Thanks in advance.

*asked on October 28, 2015* -
## AP Chemistry

For each of the following pairs of half-cells, determine the overall electrochemical reaction that proceeds spontaneously. Na+ | Na, Ni2+ | Ni

*asked on October 26, 2015* -
## Chemistry

Why is it important to not let the wooden split burn ?

*asked on October 23, 2015* -
## Algebra 2

Give one example of a situation where you would make a discrete graph and an example of when you will see a continuos graph . I need help pls

*asked on October 21, 2015* -
## Algebra 2

Give one example of a situation where you would make a discrete graph and an example of when you will see a continuous graph.

*asked on October 21, 2015* -
## Algebra 2

3x/7+2/7=2

*asked on October 13, 2015* -
## Algebra 2

Solve the following systems algebraic ally X+2y=17 X-y=2

*asked on October 13, 2015* -
## Algebra 2

Jason loves to download music. Downloads R Us sells songs only in packages of three, and it charges $2.00 for each package of three songs. Jason's favorite group just released their greatest hits CD, which has 17 songs on it. Jason wants to buy all 17

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

ClO- + I- → IO- + Cl- 1) What are the names of these ions? is it "The hypochlorite ion reacts with iodide ion to form iodate ion with chloride ion" ? 2) Write the general rate law (using the letters k for the rate constant, and n and m for the reaction

*asked on September 7, 2015* -
## chemistry

Hydrogen sulfide burns in oxygen to form sulfur dioxide and water. If sulfur dioxide is being formed at a rate of 0.19 mol L-1 s-1, what are the rates of disappearance of hydrogen sulfide and oxygen? rate of disappearance of O2? rate of disappearance of

*asked on September 4, 2015* -
## chemistry

The radioactive isotope, phosphorus-32, has a half-life of 14.26 days. How much phosphorus-32 will remain after 60 days? Please help.

*asked on September 3, 2015* -
## chemistry

ClO3^-(aq)+3SO3^2- ¡÷ Cl^-(aq)+3SO4^2- 1) If the SO3^2- ion is disaapearing at rate of 0.458 mol/L*s, how fast is the Cl^- ion appearing? 2) if the after 10 minutes of reaction time, 1.09x10^-4 mole of Cl^- ion has been produced, how many moles of SO3^2-

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

How do I rearrange this equation to solve for m1 (step by step) r1/r2 = √m2/m1

*asked on August 24, 2015* -
## World History

Why did Mesopotamia city-states flourished? Was it due to specialized labor or conquered an area large enough to make themselves self-sufficient.

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

A 10.0-m long wire whose total mass is 39.5 grams is under a tension of 577 N. A pulse is sent down the left end of the wire and 29 ms later a second pulse is sent down the right end of the wire. Where do the pulses first meet?

*asked on July 21, 2015* -
## chemistry

1. Which example has particles that can be drawn closer to occupy smaller volume? a. fruit juice b. block of wood c. air inside the syringe d. ice cube 2. Which of the following phenomena does NOT involve the application of gas pressure? a. burning fuels

*asked on July 10, 2015* -
## chemistry

A piece of iron (Cp = 0.450 J/(gi°C)) that has a mass of 21.5 g and an initial temperature of 100.0°C is submerged in X g of water (Cp = 4.184 J/(gi°C)) at 20.0°C. The temperature of the system (iron and water) changes to 21.4°C. What is the value of

*asked on July 7, 2015* -
## chemistry

1. Which example has particles that can be drawn closer to occupy smaller volume? a. fruit juice b. block of wood c. air inside the syringe d. ice cube 2. Which of the following phenomena does NOT involve the application of gas pressure? a. burning fuels

*asked on July 6, 2015* -
## math

2 trains leave metropolos at same, one going south 50 mph the other east 40 mph. How far apart will they be at 3 hours

*asked on June 3, 2015* -
## calculus

Can I have a website of Beginner calculus books?

*asked on June 2, 2015* -
## Finite Math

P(R or S)=.64 P(R)=.38 P(S)=.52 Probability Union Rule P(R and S)=P(R)+P(S)-P(R and S) .64=.38+.52-P(R and S) .54=.9-P(R and S) At this point, how do I deal with the -P(R and S)? I know the final answer is .26, but how do I get there?

*asked on April 6, 2015* -
## Chemistry

Cola drinks have a phosphoric acid content that is described as `from 0.057% to 0.084% of 75% phosphoric acid, by mass." Estimate the pH range of cola drinks corresponding to this average range of H3PO4 content. I am having trouble with the wording of this

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

a 150g-iron ball at 95 Celsius is dropped into a cavity in a block of ice.the cavity is then found to contain 21 g of water . CALCULATE THE HEAT OF FUSION OF ICE (The specific heat capacity of iron is 0.11 cal/g x C degrees.)

*asked on January 27, 2015* -
## math

a 150g-iron ball at 95 Celsius is dropped into a cavity in a block of ice.the cavity is then found to contain 21 g of water . calculate the heat of fusion of ice.

*asked on January 27, 2015* -
## Math

-3/4>-6/10a a>2/5 my answer

*asked on January 26, 2015* -
## Chemistry

What is the HCl concentration if 65.8mL of 0.300M NaOH is required to titrate a 15.0mL sample of the acid?

*asked on December 18, 2014* -
## science 8

Waht is the reason for the seasons experiment?

*asked on December 16, 2014* -
## chemistry

50ml of 20.8% bacl2 and 100ml of 9.8% h2s04 solutions are mixed. Molarity of cl ions in the resulting solution wt of ba =137 I do not still understand step by step clearly Thank a lot

*asked on November 23, 2014* -
## chemistry Thank a lot help

100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density 1.25g/ml. 50ml of 20.8% bacl2 and 100ml of 9.8% h2s04 solution are mixed. Molarity of cl ions in the

*asked on November 22, 2014* -
## chemistry

100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density is 1.25g/ml 50ml of 20.8% bacl2 and 100ml of 9.8% h2s04 solutions are mixed. Molarity of cl ions in the

*asked on November 16, 2014* -
## chemistry Ben

50ml of 20.8% bacl2 and 100ml of 9.8% h2s04 solutions are mixed. molarity of cl ions in the resulting solutions is At.wt of ba = 137 100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of

*asked on November 16, 2014* -
## chemistry step by step for me

100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density is 1.25g/ml. 50ml of 20.8% bacl2 and 100ml of 938% h2s04 solutions are mixed. Molarity of cl ions in

*asked on November 16, 2014* -
## math

plot the number on the number line 1 5/6

*asked on October 22, 2014* -
## math

A wheel made 660 revolutions at 44 8/9 revolutions per minutes. how many minutes did it rotate

*asked on October 21, 2014* -
## English - Parts of Speech

I want the definition of all Parts of Speech(not too short, not too long) with five examples. Thanks in advance.

*asked on October 2, 2014* -
## English

What are the different parts of speech?

*asked on September 28, 2014* -
## Algebra

Please show how to solve for problems like this: How many pounds of coffee that costs 4.50/lb be mixed with 20 lbs of coffee that costs 7.50/lb to make a mixture that costs 5.00/lb

*asked on September 22, 2014* -
## Science

When taking a bath, we use approximately 450 lbs of water. How much heat, measured in British Thermal Units (BTU) is required to heat the water from 60 degrees Fahrenheit to 104 degrees Fahrenheit?

*asked on September 9, 2014* -
## Chem

A 2.8L engine in a vehicle with air conditioning uses 26.5L of coolant. If the coolant has density of 1.11g/ml, what mass does the coolant add to the vehicle ?

*asked on September 2, 2014* -
## chemistry clearly step by step

Al2(s04)3 solution of 1 molal concentration is present in 1 litre solution of 2.684g/cc.How many moles of bas04 would be precipitation on adding bacl2 in excess? The answer 6M I do not understand pls explain step by step Thank a lot all tutors

*asked on July 20, 2014* -
## chemistry step by step clearly

10L of hard water required 5.6g of lime for removing hardness. hence temporary hardness in ppm of cac03. The answer 1000ppm I really want all tutors to solve it form clearly step by step. Thank a lot

*asked on July 20, 2014* -
## chemistry step by step for me. Thank a lot

342gm of 20% by mass of ba(oh)2 solution sq gr .57 is reacted with 1200ml of 2m hn03. if the find density is same as pure water then molarity of the ion in resulting solution by nature of the above solution is dentified. The answer 0.888M Who helps me to

*asked on July 19, 2014* -
## Chemistry step by step thank a lot

10L of hard water required 5.6g of lime for removing hardness. Hence temporary hardness in ppm of cac03 The answer 1000 Who helps me to solve it for me step by step clearly Thank a lot all tutors

*asked on July 13, 2014* -
## chemistry step bystep thank a lot

10L of hard water required 5.6g of line for removing hardness. Hence temporary hardness in ppm of cac03. The answer 1000 ppm= 1mg/1L cac03 = 100 g/mol who solve it for me clearly step by step Thank a lot all tutors

*asked on July 12, 2014* -
## chemistry step by step for me clearly

Al2(s04)3 solution of a molal concentration is present in 1 litre solution of 2.684g/cc. How many moles of bas04 would be precipitated on adding bacl2 in excess. The answer 6M I want some tutors to explain for me step by step clearly. I do not still

*asked on July 12, 2014* -
## chemistry step by step thank a lot

Al2(s04)3 solution of a molal concentration is present in 1 litre solution of 2.684g/cc. How many moles of bas04 would be precipitated on adding bacl2 in excess? the answer 6M Who helps me step by step for me clearly I am thankful to all tutors

*asked on July 11, 2014* -
## chemistry step by step for thank a lot

10L of hard water required 5.6g of lime for removing hardness. Hence temporary hardness in ppm of caco3. The answer 1000 who helps me to solve it for me step by step thank a lot

*asked on July 6, 2014* -
## chemistry step by step for me thank a lot

What is the weight of ca(oh)2 required for 10 litre of water remove temporary hardness of 100 ppm due to ca(H03)2 The answer 0.74 Thank all tutors for your help Pls show step by step for me

*asked on July 6, 2014* -
## chemistry step by step thank a lot

342gm of 20% by mass of ba (OH)2 solution sq gr 0.57 is reacted with 1200ml of 2M hn03. If the final density is same as pure water then molarity of the ion in resulting solution by nature of the above solution is dentified 0.888m Who solve it for me step

*asked on July 6, 2014* -
## chemistry step for step thank a lot

10L of hard water required 5.6g of lime for removing hardness. Hence temporary hardness in ppm of cac03. The answer 1000 I think ppm= 1mg/1L 10L x 100g/mol cac03 = 1000 Who check it for me step by step Thank all tutors for your help. How many ml of a 0.05M

*asked on July 5, 2014* -
## Chemistry step by step thank a lot

10L of hard water required 5.6g of line for removing hardness. hence temporary hardness in ppm of cac03. The answer is 1000 Pls solve it for me step by step Thank a lot all tutors for your help.

*asked on July 5, 2014* -
## chemistry Step for step for me thank a lot

A sample of peanut oil weighing 2g is added to 25ml of 0.4M koh. After saponification is complete, 8.5ml of 0.28M hes04 is needed to neutralize excess of koh. The saponification number of peanut oil I do not still understand Pls clearly step by step for

*asked on July 4, 2014* -
## Chemistry Step by step for me Thank a lot

A sample of peanut oil weighing 2g is added to 25ml of 0.4M koh. After saponification is complete, 8.5ml of 0.28M hes04 is needed to neutralize excess of koh. Saponification number of peanut oil Thank for all tutors for your help. Pls solve it for me step

*asked on July 4, 2014* -
## chemistry step by step for me Bob

A sample of peanut oil weighing 2g is added to 25ml of 0.4M koh. After saponification is complete, 8.5ml of 0.28M hes04 is needed to neutralize excess of koh. The saponification number of peanut oil. The right answer 146.75 Bob solve it for me step by step

*asked on July 4, 2014* -
## chemistry Ben step by step for me

10L of hard water required 5.6g of lime for removing hardness. Hence temporary hardness in ppm of cac03 The answer 1000 I do not get answer 1000 ppm= 1mg/1L Ben solve it for me step by step for me

*asked on July 4, 2014* -
## chemistry please step by step for me

what volume of hcl solution of density 1.2g/cm3 and containing 36.5% by weight hcl, must be allowed to react with zinc in order to liberate 4g of hydrogen I know this calculate this part, but I do not get the answer 333.3ml 1.2g/ml x 1000 x 0.365/36.5 =

*asked on July 4, 2014* -
## chemistry

What volume of hcl solution of density 1.2g/cm3 and containing 36.5% by weight hcl, must be allowed to react with zinc in order to liberate 4g of hydrogen The answer 333.3ml Who helps me step by step for me

*asked on July 4, 2014* -
## chemistry

one litre of a sample hard water contain 4.44mg cacl2 and 1.9mg of mgcl2. What is the total hardness in terms ppm of cac03?

*asked on June 29, 2014* -
## chemistry Who clearly step by step

What per cent of free s03 can be obtained from 100g oleum, that is labeled with 113.5% h2s04? To 100 ml of 5M naoh solution density 1.2g/ml were added 200ml of another naoh solution with have a density 1.5g/ml and contains 20 mass percent of naoh. What is

*asked on June 29, 2014*