# bill

Newest questions and responses by bill-
## math

Sound travels at 343 meters per second. You measured 3 seconds for sound travel from place A to place B. What is the distance between and A and B?

*asked on November 27, 2018* -
## programming

write a program that will calculate the average of the total marks scored by 10 students, if each student has done 4 exams.

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

Find all $z$ such that \[(z+1)^7 = z^7.\]You do not have to put your answer in the simplest rectangular or exponential form.

*asked on September 7, 2018* -
## social studies

Which theory do most scientists believe about the first inhabitants of North America? A. They walked across the frozen Bering Land Bridge. B. They swam across the Pacific Ocean. C. They sailed across the Atlantic Ocean.---------- D. They walked across the

*asked on August 28, 2018* -
## Physics

A small ball of mass m is placed on top of a large ball of mass 3m. Both balls are dropped simultaneously from a height h = 5.50 m as shown in the figure. Assuming the radius of the large ball and small are small and thus negligible in comparison to the

*asked on July 11, 2018* -
## Physics

You throw a baseball directly upward at time t=0 at an initial speed of 13.1 m/s. What is the maximum height the ball reaches above where it leaves your hand? Ignore air resistance and take g=9.80 m/s2. maximum height: At what times does the ball pass

*asked on June 9, 2018* -
## physics

Helium occupies a volume of 0.04m3 at a pressure of 2*10^5 PA and temperature of 27 degree Celsius.Calculate the rms speed of its molecule and the average translational kinetic energy of one of this gas.

*asked on June 5, 2018* -
## physics

mathematical,express the relationship between number of moles,number of molecules and avogadros constant

*asked on June 5, 2018* -
## Physics

I got 4V1 a fixed mass of gas at constant pressure occupies a volume.the gas undergoes a rise in temperature so that the Vrms of its molecule is doubled.What is the new volume

*asked on June 4, 2018* -
## Algebra

What is the answer to in music what does allegro mean Idk the answer Allegra with pizzazz

*asked on June 4, 2018* -
## Physics

please I and my friend has been trying this one. If there there are 2.7*10^19 molecules are there in 1.0cm3 of a gas at 273k and pressure 1.0*10 ^5Pa. How many molecules are there in 1.0cm3 of the gas at 350k and pressure 1.0*10 ^5Pa.

*asked on June 4, 2018* -
## physics

A lagged copper rod has a uniform cross-sectional area of 1.0cm3 and length 20.0cm. when steady state is attained, the temperature of one end of the rod is 120degree Celsius and other end is 0degree Celsius. Calculate; (1)the temperature gradient (2).rate

*asked on June 4, 2018* -
## Physics

a fixed mass of gas at constant pressure occupies a volume.the gas undergoes a rise in temperature so that the Vrms of its molecule is doubled.What is the new volume

*asked on June 4, 2018* -
## physics

A rotating turntable of mass 200g and radius 10 cm is uniformly accelerated from rest to attain it's maximum velocity of 33 and half revolution per minute through an angular displacement of 240 degree . Determine the (1). uniform angular acceleration.

*asked on May 29, 2018* -
## Physics

The international space center is 1500km above the earths surface. Determine the escape velocity of a rocket launched into space at this altitude if the mass of the earth is 6*10^24kg and the radius is 6.4*10^6m.

*asked on May 29, 2018* -
## Physics

During take-off the angular velocity of the blades of a revving engine of engine of an air craft change from 350rev/min to 570rev/min in a time interval of 15minutes. Determine (1).uniform angular acceleration in rad/sec (2).angular displacement during the

*asked on May 29, 2018* -
## Physics

A rotating turntable of mass 200g and radius 10 cm is uniformly accelerated from rest to attain it's maximum velocity of 33 and half revolution per minute through an angular displacement of 240 degree . Determine the (1). uniform angular acceleration.

*asked on May 29, 2018* -
## Physics

The international space center is 1500km above the earth surface. Determine the escape velocity of a rocket launched into space at this altitude if the mass of the earth is 6.0*10^-24kg and the radius is 6.4*10^6 m.

*asked on May 27, 2018* -
## Physics

A uniform beam of mass 2kg and length 4cm is rotated about an axis 8cm from one end.Determine it's moment of inertia

*asked on May 27, 2018* -
## Physics

Determine the escape velocity at a location 2.5*10^4km from the surface of Jupiter

*asked on May 27, 2018* -
## Chemistry

an unknown compound is known to contain 30.34%N and 60.56%O and has a molar mass of 92.00g. what are the empirical formula and the molecular formula for the compound?( O=16.0g/mol,N=14.1g/mol)

*asked on May 15, 2018* -
## Chemistry

an unknown compound is known to contain 30.34%M and 60.56%O and has a molar mass of 92.00g. what are the empirical formula and the molecular formula for the compound?( O=16.0g/mol,M=14.1g/mol)

*asked on May 15, 2018* -
## Chemistry

State the relationship between normality and molality

*asked on May 15, 2018* -
## Physics

A body of mass m is moving a circular track of radius r with a tangential velocity V. Write an expression for *The angular momentum *The centrifugal force

*asked on May 14, 2018* -
## Physics

A rocket of mass,m is located at an alttitude h meters above the surface of a planet of a mass,M and radius, R. *write an expression for the gravitational pull on it. *Deduce an expression for the gravitational potential and escape velocity at that

*asked on May 14, 2018* -
## Civics

Which of the following statements best describes a negative consequence of the federal government's use of credit? A. The government can use money from securities sales to help people in emergencies. B. Government use of credit increases the total national

*asked on April 11, 2018* -
## math

A rectangular prism has dimensions 4 by 6 by x. If the total surface area of the prism is 496 square units, what is the value of x?

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

Amber bought a shirt for 26.95 dollars. The shirt had been marked down 30 percent. What was the original price of the shirt?

*asked on March 17, 2018* -
## Please need help Asap

Jenna invests in a savings account that has an annual interest rate of 12% compounded monthly. Jenna initially deposits $2673. How much money will Jenna have after 4 years?

*asked on March 12, 2018* -
## Alg I

5 7/16 is what percent of 8 1/13 ?

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

How do external factors (such as stirring or shaking) determine whether a mixture will become a mechanical mixture or a solution?

*asked on February 27, 2018* -
## Alegbra 1

Find an equation of the line that is perpendicular to the line whose equation is 2x – 5y = 3 and passes through (-2, 7).

*asked on February 27, 2018* -
## Physics

Would a rug have static or dynamic friction?

*asked on February 16, 2018* -
## Algebra I

It is the grand opening of a local supermarket. Every 5th customer will receive a coupon for a free turkey and every 7th customer will receive a coupon for a free half gallon of ice cream. If 400 customers come in on opening day, how many people will get

*asked on February 8, 2018* -
## Alegbra 1

Clay Potts owns a ceramic store. His brother Jack works for him. Jack earns wages of 50 dollars per day plus 10% of the profits. Clay gets the other 90% of the profits. On Monday the store makes a profit of 30 dollars. How much does Clay get?

*asked on February 6, 2018* -
## Alegbra 1

Clay Potts owns a ceramic store. His brother Jack works for him. Jack earns wages of 50 dollars per day plus 10% of the profits. Clay gets the other 90% of the profits. On Monday the store makes a profit of 30 dollars. How much does Clay get?

*asked on February 5, 2018* -
## Pre calc

Use the Pythagorean indentities rather than reference triangles. Find tan θ and cot θ if sec θ=8/7 and sin θ

*asked on January 29, 2018* -
## Pre calc

Evaluate by using the Pythagorean identities Find sin θ and cos θ if tan θ=1/6 and sin θ >0

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

In an elevator, you go up 3 floors and down 4 floors. Write an integer that represents the net change in your position.

*asked on January 25, 2018* -
## Alegbra 1

The following four numbers are listed in ascending order: 7, x, 24, y. the median of the four numbers is 18 and the mean is 61. Find x.

*asked on January 25, 2018* -
## Math

Solve the following system of equations. You will type your x value in the first part and the y value in the second part of the question. If the answer if no solution then type NS in both parts and if the the answer is infinite solutions then type I in

*asked on January 24, 2018* -
## Physics

explain how the frequency of the oscillating particle particle can affect the type of EM Wave.

*asked on January 17, 2018* -
## Alegbra 1

Mrs. Gifford's class consists of 15 girls and 25 boys. the class mean was 80 and the mean girl’s scores was 75. What was the mean of the boy’s scores?

*asked on December 16, 2017* -
## Alegbra 1

Mrs. Gifford's class consists of 15 girls and 25 boys. the class mean was 80 and the mean girl’s scores was 75. What was the mean of the boy’s scores?

*asked on December 16, 2017* -
## Alegbra 1

On the first test the mean of the girlsâ€™ scores was 80 and the mean of the boyâ€™s scores was 70. What was the class mean? (Remember the class mean is not just averaging the two means) On the second test, the class mean was 80 and the mean

*asked on December 15, 2017* -
## Alegbra 1

Mrs. Gifford's class consists of 15 girls and 25 boys. On the first test the mean of the girlsâ€™ scores was 80 and the mean of the boyâ€™s scores was 70. What was the class mean? (Remember the class mean is not just averaging the two means) On

*asked on December 15, 2017* -
## Alegbra 1

f(-3) Answer is:

*asked on December 15, 2017* -
## Alegbra 1

The difference between the measures of two supplementary angles is 8˚. What is the measure of the larger angle? What is the measure of the smaller angle?

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

On the second test, the class mean was 80 and the mean girl’s scores was 75. What was the mean of the boy’s scores?

*asked on December 15, 2017* -
## Alegbra 1

Mrs. Gifford's class consists of 15 girls and 25 boys. On the first test the mean of the girls’ scores was 80 and the mean of the boy’s scores was 70. What was the class mean? (Remember the class mean is not just averaging the two means)

*asked on December 15, 2017* -
## Alegbra 1

The two equal sides of an isosceles triangle are 11 feet longer than the third side. The perimeter of this triangle is 56 feet. What is the length of the third (nonequal) side

*asked on December 15, 2017* -
## Alegbra 1

This year Frank spends an average of 70 minutes each night doing homework. This is 30 minutes less than twice the time he averaged last year. What was his average time last year?

*asked on December 15, 2017* -
## Algebra 1

Solve the following system of equations. You will type your x value in the first part and the y value in the second part of the question. If the answer is no solution then type NS in both parts and if the the answer is infinite solutions then type I in

*asked on December 15, 2017* -
## Alegbra 1

This year Frank spends an average of 70 minutes each night doing homework. This is 30 minutes less than twice the time he averaged last year. What was his average time last year?

*asked on December 15, 2017* -
## Alegbra 1

One of two complementary angles has a measure of 6º greater than the other. What is the measures of the larger angle?

*asked on December 15, 2017* -
## Alegbra 1

The author of a book on running receives a royalty of 75¢ per copy sold. If the royalty rate is 12% of the single copy price, how much money per copy does not go to the author?

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

A supertanker (mass = 1.57E+8 kg) is moving with a constant velocity. Its engines generate a forward thrust of 7.47E+5 N. Determine the magnitude of the resistive force exerted on the tanker by the water. 7.47×10^N is correct, but I need to know how

*asked on December 6, 2017* -
## physics

Sphere 1 has surface area A1 and volume V1 and sphere 2 has surface area A2 and volume V2. If the radius of sphere 2 is 3.53 times the radius of sphere 1, what is the ratio of the areas A2/A1 ? 1.25×101 & 4.40×101 are correct answers but i dont remember

*asked on December 6, 2017* -
## Algebra

Farmer Brown is making a garden 14.5 feet long and 8.75 feet wide. He puts up a fence 23.5 feet long and 17.75 feet wide. What is the distance from the fence to the edge of the garden? (The fence is the same distance from all sides of the garden)

*asked on November 22, 2017* -
## math

Tingles wants to sell potato chips in cylindrical containers. So the chips do not fall out the containers will have ends. To be environmentally conscious, the company president wants to make the container entirely out of cardboard. Furthermore, they will

*asked on November 22, 2017* -
## physics

What is the average useful power output of a person who does 5.50×106 J of useful work in 6.50 h? Working at this rate, how long will it take this person to lift 1850 kg of bricks 1.20 m to a platform? (Work done to lift his body can be omitted because it

*asked on November 17, 2017* -
## Math

2/10+13/100

*asked on November 12, 2017* -
## math

I am prepping for a mid-term. A deep sea diving bell is lowered at a rate (constant). After 10 min, the bell is at a depth of 300 ft. After 30 min the bell is at a depth of 1400 feet. What is the ave. rate of lowering per minute? Thanks

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

A quarter on a spinning vinyl record has a centripetal acceleration of 34.0 m/s2. What is the acceleration of the quarter if it is placed twice as far from the centre of the vinyl record?

*asked on September 27, 2017* -
## Biology

What are the roles of hydrogen peroxide, oxygen, hydrogen, and catalase in the following chemical reaction? catalase 2H2O2 > O2 + 2H2O A. Catalase is an enzyme, O2 and H2O are substrates, and H2O2 is a reactant. B. Catalase is a substrate, O2 and H2O are

*asked on September 12, 2017* -
## math

How many degrees are in the smaller angle formed by the minute and hour hands on a clock at 12:30?

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

insert +, -, X, /, and () to make each math statement true 4 4 4 4 = 10 4 4 4 4 = 6

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

What fraction of a square mile is a field that is 1/2 mile long and 1/4 mile wide?

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

How do I convert numbers into percentages. The all of the percentage is out of 50%.

*asked on May 28, 2017* -
## Statistics

The weight of bags of pretzels are normally distributed with a mean of 150 grams and a standard deviation of 5 grams. Bags in the upper 4.5% are too heavy and must be repackaged. Also, the bags in the lower 5% do not meet the minimum weight requirement and

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

ell whether each equation has one solution, zero solutions or infinite solutions 5(x-3)+6=4x+3

*asked on March 9, 2017* -
## math

tell whether each equation has one solution, zero solutions or infinite solutions 5(x-3)+6=5x-9

*asked on March 8, 2017* -
## World History

(Need help with this prompt, just one paragraph will do) It is 1870, French forces leave Italy (to fight in the Franco-Prussian War) and Italians triumphantly declare Rome their united capital. You have been hired by Vittorio Emanuele II, the King of

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

What is the approximate ratio of the solubility of CaSO4 (Ksp = 2.4 x 10−5) in pure water to the solubility of CaSO4 in 0.10 M Na2SO4 at the same temperature?

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

Calculate how many moles of Na2S2O3 must be added to dissolve 0.020 mol AgBr in 1.0 L of water at 25°C (assume constant volume). AgBr(s) ↔ Ag+(aq) + Br−(aq) Ksp = 3.3 x 10^−13 Ag+(aq) + 2S2O32−(aq) ↔ [Ag(S2O3)2]3−(aq) Kf = 2.0 x 10^13 (1)

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

Find the ratio of the volumes of NaC3H5O3 soloution to HC3H5O3 (lactic acid) required to prepare a buffer with a pH of 3.90. the solutions are equal in molarity. Ka = 1.4 x 10-4 for HC3H5O3. ratio = ________ mL of NaC3H5O3 per mL of HC3H5O3

*asked on February 22, 2017* -
## Chemistry

Find the pH of a buffer solution with equimolar concentrations of: HCOOH and NaCOOH (Ka = 3.5 x 10-4 for HCOOH)a

*asked on February 22, 2017* -
## Algebra

If there are 8 sharpeners in every box, is the formula that relates s Sharpeners and B boxes B=8s or S=8B?

*asked on February 12, 2017* -
## Algreba

Write an equation of the line that passes through the given point and is perpendicular to the given line (2,3), x+2y=-7

*asked on January 27, 2017* -
## history

how did america's economy change after the civil war.

*asked on January 9, 2017* -
## Geometry

What's the lateral area of a right cylinder if the radius of the base is 12 mm and the altitude of the cylinder is 5 times the base radius?

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

How do scientists explain the fact that some landforms that are far apart and separated by oceans appear to be related?

*asked on December 14, 2016* -
## Chemistry

Consider two equally sized balloons at room temperature, one filled with oxygen gas and one filled with an unknown gas. If the balloon filled with oxygen gas deflates in 37 hours and the other balloon deflates in 26 hours, which of the following is the

*asked on December 10, 2016* -
## Chemistry

If 2.00 g of element G reacts with 5.00 g of element M to produce 7.00 g of a compound with the formula G3M2, what is the atomic mass of G if the atomic mass of M is 135.0 amu? Answer is 36 amu but why

*asked on December 10, 2016* -
## Chemistry

If the change in temperature of a sugar added solution of water increased its boiling point by 0.6C how many moles of sugar was added to the water?

*asked on November 29, 2016* -
## Physics

a softball batter hits a fly ball that is caught 3.8 seconds later, 88m from home plate. The ball is caught at the same height from which it was thrown. What was its initial velocity? What is the maximum height above its launch point that it reached?

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

A teacher has 27 students in her class.she asks the students to form as many groups of 4 as possible.how many students will not be in a group

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

You and a friend eat tacos. You order 2 tacos and 5 burritos which equals $19. Your friend orders 1 taco and 4 burritos which equals $14. Find the cost of a taco and a burrito. Please help

*asked on September 19, 2016* -
## Integrated Math

If (c) were f(x)=-4/(k+7) what value of k would be excluded from the domain? I know that we cant have 0 in the denominator. I solved the following: k+7=0 Value cannot be -7

*asked on September 18, 2016* -
## algebra

How do I solve d=ut+(1/2)at^2

*asked on September 12, 2016* -
## Organic chemistry

How many nodes are in the pi* orbital of a carbon-carbon double bond? Please explain. Thanks in advance.

*asked on September 7, 2016* -
## math

Eight people rob a bank: What percent of the loot belongs to three people if they decide to share it evenly

*asked on July 30, 2016* -
## Economics/Finance

How much Jim can accumulate in a private pension fund over 20 years if the fund offers 5% interest compounded annually, and he can afford to deposit $2,000 at the end of every 2nd year? My textbook says the correct answer

*asked on July 4, 2016* -
## physics

an initially resting 300g car is dragged along a horizontal frictionless table by a massless cord. The cord is attached to vertically hanging 60g mass by a frictionless massless pulley. If the car starts from rest, determine the time it would take for it

*asked on June 2, 2016* -
## math

a board of 4 members is going to be formed from the 30 students of a class. The board is formed of a president a vice president a secretary and a treasurer. What is the number of possible boards knowing that each of the 30 students can occupy any post?

*asked on April 24, 2016* -
## math

four girls bought each a swimsuit and decided to borrow among themselves. How many possible ways can they dress up knowing that each girl can use the same swimsuit only once?

*asked on April 24, 2016* -
## math(counting)

an anagram of a word is obtained by permuting its letters. a-how many anagrams does the word "MAIRE" have b-Same question for the word "OISEAU"

*asked on April 24, 2016* -
## math(counting)

in how many different ways can 3 boys and 2 girls sit on a bench? in how many different ways can they sit knowing that the boys have to sit near each other and the girls also

*asked on April 24, 2016* -
## Geometry- PLEASE HELP!!

Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point $T$ is the intersection of $\overline{HM}$ and $\overline{YG}$. Find the area of $\triangle MTG$ if $[XYZ] =150$.

*asked on April 20, 2016* -
## Geometry

Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?

*asked on April 19, 2016*