# K

Newest questions and responses by K-
## science

at what temperature will 50g of nh4br produce a saturated solution when dissolved in 100 g of water

*asked on January 17, 2019* -
## math

A number multiplied by 12 is equal to the sum of the square of that same number and 36. What is that number?

*asked on January 12, 2019* -
## Social Studies

What is a republic? What is a constitutional republic? I think C. A republic with a Constitution.

*asked on October 18, 2018* -
## Physics

What is the ultimate strength and how can it be determined?

*asked on October 2, 2018* -
## Math

4x=36

*asked on September 29, 2018* -
## c programming

write a program and create a flowchart or psuedocode that will ask the user for 3 grades. the program will calculate the average on those 3 grades. the program will display the 3 grades the average and the letter grade.

*asked on September 29, 2018* -
## Biology

What selective advantages drove the development of sexual reproduction, and how did it develop?

*asked on August 10, 2018* -
## Science

The dimensional formula of density of pressure is D= force/ area = Md^-1T^-2 What does M, d and T and their exponents mean?

*asked on July 20, 2018* -
## Physics

A Ferris wheel with radius 9.5 m initially rotates at a constant rate by completing 0.75 rev in 25.00 s. It then begins to decelerate at a rate of 0.30 rad/s2 with its only passenger at the top of the wheel. Find the direction of the total acceleration

*asked on July 19, 2018* -
## Second solution for ambiguous case?

Given a = 31.5, b = 51.8, A = 33 degrees, find the value of c in triangle ABC. bsinA = 51.8sin33 = 28.21 -> bsinA < a < b so there are two solutions Using sine law: sinB/b = sinA/a sinB/51.8 = sin33/31.5 sinB = 51.8 * sin33/31.5 sinB = 0.895628635 B =

*asked on July 17, 2018* -
## Math

Question : find (h,k) and radius x^2 + y^2 +1/2x + 2y +1/16 = 0 According to the equation : (x−h)^2+(y−k)^2 = r^2 x^2 + y^2 +1/2x + 2y +1/16 = 0 (x^2+1/2x+1/16)+(y^2+2y+1)=−1/16+1/16+1 (x+1/4)^2+(y+1)^2=1 so (h,k) = (-1/4, -1) and r = 1 theres no

*asked on May 8, 2018* -
## Math

A car traveling from town A to town B at an average speed of 80 km/h took 54 minutes. Another car took 40 minutes to travel the same distance. What was the difference in their speed in km/h?

*asked on May 6, 2018* -
## chemistry / science

With regard to Stainless Steels, how is a passive layer regenerated? thanks in advance!!

*asked on April 29, 2018* -
## math

An Artisan has 63 kg of metal of density 7,000kg/m3. He intends to use make a rectangular pipe with external dimensions 12 cm by 15 cm and internal dimensions 10 cm by 12 cm. Calculate the length of the pipe in meters.

*asked on April 14, 2018* -
## math

Manyatta Village is 74 km North West of Nyangata Village. Chamwe village is 42 km west of Nyangata. By using an appropriate scale drawing, find the bearing of Chamwe from Manyatta.

*asked on April 14, 2018* -
## math

The angle which the tangent to the curve at the point (2, 5) makes with the horizontal

*asked on April 14, 2018* -
## Math

The Position of two A and B on the earth’s surface are (36°N, 49°E) and (36°N, 131°W ) respectively. (a) The difference in long between town A and town B (2 marks) (b)) Given that the radius of the earth is 6370, calculate the distance town A and

*asked on April 14, 2018* -
## math

Find the reciprocal of 0.342. Hence evaluate:(√0.0625/0.342)

*asked on April 14, 2018* -
## Chem - Redox rxn

Just wanna make sure, if i did it correct or not. Cl2 + 2NaBr --> Br2 + 2NaCl (0)---(+1)--(-1)---(0)------(+1)(-1) So Cl2 loss = oxidation Br2 Gain = Reduction Am I correct ? Thanks

*asked on April 8, 2018* -
## Math

The flask consist of a cylindrical part and a frustum of a cone. The diameter of the base is 10 cm the diameter is 2 cm while that of neck is 2 cm. The vertical height of the flask is 12 cm. (a) the slant height of the frustum part; (b) the slant height of

*asked on April 4, 2018* -
## Math

The flask consist of a cylindrical part and a frustum of a cone. The diameter of the base is 10 cm the diameter is 2 cm while that of neck is 2 cm. The vertical height of the flask is 12 cm. (a) the slant height of the frustum part; (b) the slant height of

*asked on April 3, 2018* -
## Math

The flask consist of a cylindrical part and a frustum of a cone. The diameter of the base is 10 cm the diameter is 2 cm while that of neck is 2 cm. The vertical height of the flask is 12 cm. (a) the slant height of the frustum part; (b) the slant height of

*asked on April 3, 2018* -
## Chemistry

A 50.0 −mL sample of 1.50×10−2 M Na2SO4(aq) is added to 50.0 mL of 1.23×10−2 M Ca(NO3)2(aq). What percentage of the Ca2+ remains unprecipitated? Calculate the moles of Ca(NO3)2 you have (concentration * volume in L). Moles of Ca(NO3)2 = moles of

*asked on March 31, 2018* -
## Chemistry

A possible reaction for converting methanol to ethanol is CO(g)+2H2(g)+CH3OH(g)→C2H5OH(g)+H2O(g) ΔH0 for this reaction at 25∘C. ΔH0 = -165.7 kJ ΔS0 for this reaction at 25∘C. ΔS0 = -227.4 J/K ΔG0 for this reaction at 25∘C. ΔG0 = -97.9 kJ -

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

The flask consist of a cylindrical part and a frustum of a cone. The diameter of the base is 10 cm while that of neck is 2 cm. The vertical height of the flask is 12 cm. (a) the slant height of the frustum part; (b) the slant height of the smaller cone

*asked on March 19, 2018* -
## Math

Two shopkeepers, Juma and Wan bought some items from a wholesaler. Juma bought 18 loaves of bread, 40 packets of milk and 5 bars of soap while Wan bought 15 loaves of bread, 30 packets of milk and 6 bars of soap. The price of a loaf of bread, a packet of

*asked on March 18, 2018* -
## Math

Two shopkeepers, Juma and Wan bought some items from a wholesaler. Juma bought 18 loaves of bread, 40 packets of milk and 5 bars of soap while Wan bought 15 loaves of bread, 30 packets of milk and 6 bars of soap. The price of a loaf of bread, a packet of

*asked on March 17, 2018* -
## math

Three factories Buka, Sakono and Rama produce sugar in one hundred kilogram bags daily. Buka produces three times as much as Rama. Sakono produced two times as much as Rama. If Sakono produces 500 bags, how many tones altogether do three factories produce

*asked on March 17, 2018* -
## Chemistry - acid base

You are asked to bring the pH of 0.500 L of 0.450 M NH4Cl to 7.00. 12.0 M NH3 How many drops (1 drop 0.05 mL) of this solution would you use? What I did, but its incorrect Using HH equation I found out NH4 pKa = 9.24 from table pH = pKa + log [A-] / [HA]

*asked on March 10, 2018* -
## Chemistry - acid base

A 50.0 mL sample of 1.50×10−2 M Na2SO4(aq) is added to 50.0 mL of 1.23×10−2 M Ca(NO3)2(aq). What percentage of the Ca2+ remains unprecipitated? What I did n=CV Na2SO4 = (1.50×10−2 M)(0.05L) = 0.00075 Ca(NO3)2 = (1.23×10−2 M)(0.05L) = 0.000615

*asked on March 9, 2018* -
## Chemistry - acid base

What volume of 10.0 M NaOH is needed to prepare a buffer with a pH of 7.79 using 31.52 g of TrisHCl? ( Tris. At 25 ∘C, Tris has a pKb of 5.91 ) a) The buffer from Part A is diluted to 1.00 L. To half of it (500. mL), you add 0.0250 mol of hydrogen ions

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

The two legs of a right triangle are in the ratio √3/2. If the hypotenuse is 10 units long, find the area (in square units) of the triangle. Please provide COMPLETE solution and FINAL ANSWER.

*asked on March 3, 2018* -
## Math

The two legs of a right triangle are in the ratio √3/2. If the hypotenuse is 10 units long, find the area (in square units) of the triangle.

*asked on March 3, 2018* -
## Chem

A sample of NH4HS(s) is placed in a 2.61 −L flask containing 0.120 mol NH3(g). NH4HS(s)⇌NH3(g)+H2S(g) Kp=0.108 at 25∘C Part A What will be the total gas pressure when equilibrium is established at 25∘C? I'm getting P = 1.21atm which is wrong. Can

*asked on February 22, 2018* -
## Math

the position vectors od points A and B woth respect to the original O, are (-8,5)and (12,-5) respectively. point M is the midpoint of AB and N is the midpoint of OA. Fin the coordinate of N and M; the magnitude of NM

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

Use mathematical induction to prove the property for all positive integers n. A factor of (n^3+3n^2+2n) is 3.

*asked on February 13, 2018* -
## Math

Three factories Buka, Sakono and Rama produce sugar in one hundred kilogram bags daily. Buka produces three times as much as Rama. Sakono produced two times as much as Rama. If Sakono produces 500 bags, how many tones altogether do three factories produce

*asked on February 7, 2018* -
## Math

Twenty members of a group contributed sh 80000 each to buy a piece of land. They already had sh 120000 in a bank out of which sh 20000 was to remain in the bank and the rest spent in buying the price of land. How much did the piece of land cost?

*asked on February 2, 2018* -
## Math

Twenty members of a group contributed sh 80000 each to buy a piece of land. They already had sh 120000 in a bank out of which sh 20000 was to remain in the bank and the rest spent in buying the price of land. How much did the piece of land cost?

*asked on February 2, 2018* -
## Math

Pupils in a school prepared a circular flower garden of diameter 28 meters. They dug holes each 4 meters apart along the circumference for planting flowers. How many holes were dug?

*asked on February 2, 2018* -
## math

The number of children at a film show was 49 more than that of adults . They entry fee for each child was sh 15 while that of each adult was sh 30. The total amount of money paid by the was sh 2055. How much money was paid by the children and the adults

*asked on February 2, 2018* -
## Math

Mwachia and Mbuu shared some money in the ratio 5:2. Mbuu received sh 30 less than Mwachia. How much money did Mbuu get?

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

A tailor made 48 pieces of uniform. Half of the number of the uniforms was each made using 1 1⁄4 meters of material. A quarter of the remainder was each made using 1 1⁄2 meters of material and the rest was each made using 1 3⁄4 meters of material.

*asked on January 26, 2018* -
## Government HELP

How are the first amendment rights seen in the constitution? Like how congress can't change religion

*asked on January 22, 2018* -
## Math

In a cupboard there are pencils, rulers and books. The number of pencils is 15 more than that of rulers. The number of books is three time that of rulers. If the number of pencils is p, which one the total number of items in the cupboard?

*asked on January 15, 2018* -
## math

What is the area of the region bounded by the x-axis and the lines x+y=24 and 3x-2y=12? Please show full solution and explanation

*asked on December 19, 2017* -
## math geometry

A right circular cone has a base diameter of 10 and a height of 18. A second right circular cone has a base diameter of 15. If the volume of the second cone is equal to the volume of the first cone, then what is the height of the second cone? provide

*asked on December 19, 2017* -
## math

A right circular cone has a base diameter of 10 and a height of 18. A second right circular cone has a base diameter of 15. If the volume of the second cone is equal to the volume of the first cone, then what is the height of the second cone?

*asked on December 19, 2017* -
## math

The Southeastern Conference (SEC), has fourteen universities, each of which fields a football team. The football teams are divided into two seven-team divisions. Each season, every team plays every other team in its division once, and also plays two teams

*asked on December 19, 2017* -
## math probability

Three cards are drawn at random without replacement from a standard fifty-two card deck of playing cards. What is the probability that among the three cards there is a pair or three of a kind? please provide complete solution with explanations:)

*asked on December 19, 2017* -
## math

Ben can run six miles in forty-eight minutes. If Luke can run twenty percent faster than Ben, how many minutes will Luke take to run nine miles? Please provide COMPLETE solutions with explanation please

*asked on December 19, 2017* -
## Math (check answers)

1. Write the equation of a line in slope intercept form that is parallel to y = 3x - 2 and passes through the point (-2, 1) y = -3x-5? 2. Write the equation of the line that passes through (2, 1) and is perpendicular to 5x + y = 9. x + 5y = 3?

*asked on December 15, 2017* -
## Mathss

Item 20 A bathtub is draining at a constant rate. After 2 minutes, it holds 28 gallons of water. Three minutes later, it holds 7 gallons of water. Write an equation that represents the number y of gallons of water in the tub after x minutes.

*asked on December 7, 2017* -
## Algebra: simplifying polynomials

Please simplify the following. Please show solution if possible:) Question 1: (x^3 + x^2 - y^3 - y^2) / (x^2 - 2xy + y^2) Question 2: (u^6 + v^6 + 2u^3 • v^3) / [u^3 - v^3 + (u^2 • v) - (u • v^2)]

*asked on October 15, 2017* -
## History

How are religion and culture connected? (Essay)

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

Determine the number of factors of 5^x + 2•5^x+1. Choices: A) x B) x + 1 C) 2x D) 2x + 2 Please show solution:)

*asked on October 3, 2017* -
## Math

Determine the number of factors of 5^x + 2•5^x+1. Choices: A) x B) x + 1 C) 2x D) 2x + 2 Please show solution:)

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

Find the 6th term in the expansion (x^2 - 1/x)^25 It is a Binomial Theorem problem and I am extremely confused. Please and thank you!

*asked on June 12, 2017* -
## Surface area of threaded hollow tube

I have a question for calculating the surface area of a threaded cylinder,there are ten about 19 little threads in one inch, the rod is about 6 inches, the outer diameter is about 0.6 in and the inner diameter is 0.02. Each thread is 0.014 thick if that

*asked on May 23, 2017* -
## biology

In order to maintain homeostasis, human cells must have a higher concentration of sodium ions outside the cell than inside the cell. In addition, the concentration of potassium ions must be higher inside the cell than outside the cell. Which of the

*asked on April 14, 2017* -
## English

"The sun was shining on the sea, Shining with all his might: He did his very best to make The billows smooth and bright — And this was odd because it was The middle of the night. The moon was shining sulkily, Because she thought the sun Had got no

*asked on March 7, 2017* -
## Math geometry

1) The base angles of an isosceles triangle are (50-x)^6 and (30x-12)^6 what is the vertex angle? 2) The area of a trapezoid is 52cm^2 if it's bases are 8 cm apart find the sum of their heights 3) What is the area of a circle inscribed inside an

*asked on February 27, 2017* -
## Math

How many positive integers, not having the digit 1, can be formed if the product of all its digits is 33750. With solution pls:)

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

K: 1) simplify: 1 - 1/2 + 1/4 - 1/8 + 1/16 - 1/32 2) Simplify: (1/2 - 1) - (1/3 - 1) + (1/4 -1) 3) In the proportion x^2 : 27 = 9 : x^3, what is x? 4) Between what two consecutive integers does cube root of -100 lie? 5) What is the area of a rectangle

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

Part of the road is to be on a parabolic curve given by a function of the form y = ax2 + bx + c where x and y are local co-ordinates. The road alignment must pass through the following 3 points:- x = 150m y = 190.650m x = 300m y = 611.450m x = 450m y =

*asked on December 16, 2016* -
## American Government

I need help on my American Government quiz.. Not looking for answers but for someone to see if mine are right, and if not, to help me out. Thanks! 1. When categorizing the Executive Offices of the President, what can you assume when noting the number of

*asked on November 14, 2016* -
## Math

Key:8 | 3= 8.3 what does 7|2 mean in the same stem and leaf plot

*asked on November 9, 2016* -
## Pre cal

Determine all x-intercepts, vertical asymptotes, horizontal asymptotes, and removable discontinuities of f (x)=(x^2-x-6)/(x^3-4x).

*asked on November 5, 2016* -
## biology

If the first child of a couple was without dimples, an recessive trait, what is the chance that the second child will be born without dimples? A) 100% B) 25% C) 50% D) Cannot be determined from the phenotype of the child

*asked on November 3, 2016* -
## math

Calculate lim┬(n→∞)〖(√((n^2+n))〗-n) justify your answer.

*asked on November 3, 2016* -
## math

If lim┬(n→∞)〖(x_n-x)/(x_n+x)〗=0, prove that lim┬(n→∞)〖x_n 〗=x.

*asked on November 3, 2016* -
## advanced math

A ladder is placed 4 ft from the side of a building. The top of the ladder must be 13 ft off the ground. What is the shortest ladder that will do the job? 4^2 + 13^2 = x^2 16+169=185^ =34,225

*asked on October 23, 2016* -
## physics

some rocks melt at 1800farenheit. what is the temperature in the celsius scale ?

*asked on September 27, 2016* -
## physics

The normal temperature of the human body is 37Celsius. a baby temperature is 98farenheit. DOes the baby a fever? Why?

*asked on September 27, 2016* -
## physics

a 15kg rock falls from the top of a building 8.0 high. Find its PE and KE a.when at rest at the top of the building b. halfway down the ground c. when it reaches the ground d.speed when it reaches the ground

*asked on September 26, 2016* -
## physics

a man pushes a lawnmower 50ft in 5s by exerting a force of 30lb at an angle of 53degrees with the horizon. find the work done and the average power expended in horsepower. Answer Please need help

*asked on September 26, 2016* -
## Absolute Inequalities

4-|2x-3|

*asked on September 25, 2016* -
## Trig

Can someone check my answers? Find # of triangles possible:

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

Using numbers 2,3,5,10, 24 make the number 120

*asked on August 30, 2016* -
## science

how are cohesion and adhesion properties of water linked to photosynthesis?

*asked on August 8, 2016* -
## algebra

. On the reality TV show Last Man Standing, a package is thrown from a plane to the ocean below. The contestants must swim to the package to receive the “free pass” located inside the package. The path that the package follows can be modelled by the

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

Find the point in the xy plane which is equidistant from (1,1), (7,1), and (1,9). Please and thanks.

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

For the next part, you will need to know that the position d of an object attached to a spring that oscillates with period T=1.0s is a sinusoidal function of time: d=kcos(2πt)d=kcos(2πt) for some constant k. Assume that the initial position of the object

*asked on March 30, 2016* -
## Math

Find the least positive integer that leaves remainders of 1, 2 and 3 when divided by 3, 5 and 7 respectively.

*asked on March 19, 2016* -
## Math

A game consists of drawing a number from 1-20. A player wins if the number drawn is either a prime number or a perfect square. What is the probability of winning the game?

*asked on March 19, 2016* -
## math

A 4cm x 5cm x 7cm rectangular prism is painted on all faces. If the prism is cut into 1cm x 1cm x 1cm cubes, how many cubes do not have paint on any of its sides?

*asked on March 17, 2016* -
## science computer

Write a program to read the names and age of 10 people and print the name of the oldest person.assume that there are no person of the same age.data is supplied in the following form:name,age,name,age

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

is the statement, 'the blueberries tasted delicious.' a passive statement

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

James and his friends rolled two fair number cubes 500 times and recorded the sum of the numbers shown on the cubes each time.On 42 of the trials the sum was 10.Which of these is most likely the probability that the sum of the numbers shown on the cubes is

*asked on March 7, 2016* -
## Probability

Makoto and his friends rolled two fair number cubes 500 times and recorded the sum of the numbers shown on the cubes each time. On 42 of the trials the sum was 10. What will be the probability that the sum of the numbers shown on the cubes is 10 when two

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

A long straight horizontal wire carries a current I = 4.80 A to the left. A positive 1.00 C charge moves to the right at a distance 5.00 m above the wire at constant speed v = 4500 m/s . What is the magnitude B of the magnetic field at the location of the

*asked on March 3, 2016* -
## math

the high temp today was 62 degrees. when nighttime comes, the temp will drop 40 degrees. by 4 am the temp will drop an additional 40 degrees. what is the temp at 4 am?

*asked on February 25, 2016* -
## Math

If m< 1=53 , what is m

*asked on February 25, 2016* -
## Physics

Three uniform spheres are located at the corners of an equilateral triangle. Each side of the triangle has a length of 2.50 m. Two of the spheres have a mass of 4.40 kg each. The third sphere (mass unknown) is released from rest. Considering only the

*asked on February 23, 2016* -
## bio

How many grams of MgCl2 do you need to make 2 L of a 0.2 M solution?

*asked on February 8, 2016* -
## Spanish

What's the difference between "mensajero" and "repartidor"?

*asked on January 19, 2016* -
## math

During a triathlon, Sharon swims 1/4 of the total route and cycles 3/5 of the remaining route. She runs the rest of the route. If she runs 3,600 meters, find the total distance if the route

*asked on January 14, 2016* -
## chemistry

how many liters (at STP) of chlorine gas are required to produce .050L of hydrogen chloride gas?

*asked on January 12, 2016* -
## physics

A particle of mass m = 0.3 kg is acted upon by a force so that its position vector, r(t)=2.0t^2(i)- 5.0t^2 (j) +t^2 (k) where t is in s. What is the (instantaneous) power delivered by this force to the particle at time t = 2.0s?

*asked on December 10, 2015* -
## Geometry

To repair a roof that is 4 meters high, Mr. Russo leans a 5-meter ladder against the side of the building. To reach the roof, how far away from the building should he place the base of the ladder?

*asked on December 10, 2015*