# Posts by Jay

Total # Posts: 1,779

**Math**

How do you rotate a point other than the origin? Can you give me a video or explain it?

**science**

Thank you!

**science**

How many protons are in the isotope Oxygen-20?

**Math**

Ed invests $68,000 in certificates of deposit (i.e., CDs) paying 1.75%. How much additional money does he need to invest in stocks that are expected to generate a return of 11.8% so that the average return on all of Ed’s investments is 7.5%?

**Algebra**

Suppose A – D = E, that N = 160,000, E/A = .75 and N/E = .40. Compute D/A.

**Algebra**

Assume that S/A = 5.2, D/A = .40, N/E = .75 and A = D + E. Solve for N/S.

**phyics**

A tennis player places a 68kg ball machine on a frictionless surface. the machine fires a 0.057 kg tennis ball horizontally with a velocity of 38m/s toward the north. What is the final velocity of the machine? I used p1+p2=P1'+p2' but I can't seem to get a correct ...

**physics**

The linear impulse delivered by the hit of a boxer is 104 NS during the 0.431s of contact. What is the magnitude of the average force exerted on the glove of the other boxer?

**Calculus **

James has 6 identical boxes shaped like rectangular pyramids. The total volume of all the boxes together is 1,024.8 cubic inches.If each box has a height of 6 inches,what is the base area of each box ?

**physics**

A 4kg mass moves in a circular path of 7m radius on a frictionless horizontal table. It is attached to a string that passes through a frictionless hole in the center of the table. A second 87kg mass is attached to the other end of the string. Acceleration is 9.8 m/s^2. ...

**physics**

a plane is flying in a horizontal circle at 99.5 m/s. The 92.6 kg pilot does not want his radial acceleration to exceed 9.25g. What is the minimum radius of the circular path. The acceleration of gravity is 9.8 m/s^2.

**physics**

a plane is flying in a horizontal circle at 99.5 m/s. The 92.6 kg pilot does not want his radial acceleration to exceed 9.25g. What is the minimum radius of the circular path. The acceleration of gravity is 9.8 m/s^2.

**physics**

A rotary speed of 2010 m/s. The rotating rod of 15.7 cm long. Assume the speed quoted is that of the end of the rod. What is the centripetal acceleration at the end of the rod?

**Math**

The second -1 shouldnt be a subscript

**Math**

Write the first five terms of the sequence defined by the recursive formula an = 5an-1 -1, with a1=0

**Math**

The graph of a rational function has a local maxima at (-1,0) and (8,0). The complex number 2+3i Is a zero of the function. What is the least possible degree of the function Answer is 6 But i need help with an explanation.

**trigonometric identities**

sin(pi/2+x)cos(pi-x)cot(3pi/+x)=sin(pi/2-x)sin(3pi/2-x)cot(pi/2+x

**maths **

find all possible pairs of two natural no whose sum is 77 and their gcd is 7

**physics**

A 468 kg bear grasping a vertical tree is sliding down at constant velocity. The acceleration of gravity is 10m/s^2. What is the friction force that acts on the bear.

**5th grade science**

Can you check the following? 1. Which statement about vascular plants and non-vascular plants is true? a. vascular plants produce seeds and non-vascular plants produce spores b. both plant types produce cones c. both plant types are considered angiospersm d. both plant types ...

**physics**

A 2.63 kg ball is dropped from the roof of a building 180.6 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 13.0 N on the ball. How long does it take to hit the ground? The acceleration of gravity is 9.81 m/s2 . How far from the ...

**physics**

A 3.1 kg block initially at rest is pulled to the right along a horizontal frictionless surface by a constant horizontal force of 16.6 N. Find the speed after it has moved 3.8m.

**math**

the population of Houston was 6.18 million, and increased 2% per year, what is the doubling time?

**Math**

thanks, i got it. What numbers do i use for the log to find the year there will be 2,000,000 members?

**Math**

a website has 500,000 members in 2010. The number of members increases by 15% each year. Write an exponential growth function that represents the website membership t years after 2010. use the equation to find: how many members will there be in 2016. please help with both.

**Math**

a machine originally cost $15,600 and at the end of 3 years value of $7500. what is the average rate of change in value per year of the machine between its purchase and the end of 3 years.

**Sat math**

if y=m^4=n^3 and y is greater than 1 than mn=? a) y^1/12 b) y^1/7 c) y^7/12 d) y^7

**physics**

do I combine sin60*80 with 48 then take that product and multiply with t?

**physics**

A projectile is fired off a cliff at an angle of 60 degrees to the horizontal. The height of the cliff is 48 meters and the velocity of the projectile is 80 m/s. Find the range (dx)

**algebra**

how do you write an expression showing x=the square root of 45^2 + 30^2

**physics**

A man can throw a ball a maximum horizontal distance of 73.4 meters. the acceleration is 9.8 m/s^2. How far can he throw the same ball vertically upward at the same initial speed?

**Computer Science**

If a file named "myfile" has -r--r--r-- permissions. Write the command to change it to -rwxr-xr-- permissions using both the octal and symbolic modes of the appropriate command (octal mode was included in the instructor's lecture and published on this web ...

**college math**

A teenager's heart pumps an average of 7200 L of blood every 24 hours. what is the rate of change of volume of blood? That is per 1 hour

**sat math**

An employee's training time and meeting time cannot exceed 16 hours a month. For every hour of training there is 2 hours of meeting. There should be at least 2 hours of training every month. What is the difference between the maximum and minimum number of monthly training ...

**Math**

There are 28 cars. 20 are white. The rest are blue or tan. There are 4 more tan cars than blue, How many cars are blue?

**Algebra, Trig**

You are standing at a base of a Ferris Wheel which is 4 m above ground while your friend is riding. The Ferris Wheel is 8m in diameter. Describe how the shape of the sine curve models the distance your friend is to the platform you are on. Identify the function that will model...

**Maths**

A building, B, is observed from two points P and Q which are 250 m apart. The angles PQB and QPB are found to be 67 degrees and 73 degrees respectively. What is the distance, to the nearest metre, of P from the building?

**Program Development**

Design a program to project several years of population growth. The user should be able to enter in the number of years, the current population, and the growth rate. Your output screen should print out the numbers the user entered, as well as the results in a table. Include a ...

**social studies**

Please help me

**social studies**

After Louis XVI was executed, Maximilien Robespierre led the Committee of Public Safety in carrying out what became known as the A. Scientific Revolution. B. Industrial Revolution. C. Reign of Terror. D. Hundred Years’ War.

**Science**

An animal that has body parts arranged around a central point has: A.bilateral symmetry. B.radial symmetry. C.asymmetry. D.a distinct head and tail end.

**math**

Jill Moran has grades of 95 and 87 on her first two calculus tests. What is the minimum score on her third test that will give her an average of at least 90?

**Chemistry**

When solid magnesium nitride reacts with water the reaction produces solid magnesium hydroxide and ammonia gas. If 22.9 grams of magnesium nitride are added to 31.0 grams of water, how many liters of ammonia should be produced (assuming standard temperature and pressure)? ...

**Chemistry**

When solid magnesium nitride reacts with water the reaction produces solid magnesium hydroxide and ammonia gas. 26.0 grams of magnesium nitride are reacted with 17.6 grams of water. 1. How many grams of magnesium nitride will remain after reaction is complete? 2. How many ...

**Maths**

For what values of k does the graph of y=5x^2 + kx + 1 have: a. One x-intercept b. two x-intercepts c. No x-intercepts

**Maths**

Find the possible equations of each of the following quadratics if their equation is of the form y = (x-h)^2 and their graph passes through the point: a. (1,16) b (3,9)

**Maths**

Two missiles, 2420 km apart, are launched at the same time and are headed towards each other. They pass after 1.5 hours. The average speed of one missile is twice that of the other. What is the average speed of each missile?

**Maths**

1.A projectile's height (in metres) is given by the expression t(14-t), where time t is in seconds. How long is the projectile above a height of 40m? 2. The area of a right-angled triangle is 60 square units and the lengths of the two shorter sides differ by 7 units. Find ...

**Math**

0 Tutors Online Right Now Math 20-1 Help What is this? What is tutors online right now mean? I need help What are points? See all FAQ Aron is training for a 10 km marathon swim in 19 weeks. Each week, his training plan includes a long distance swim. In week six, Aron swam a ...

**Math-- algebra 2**

x^2

**Maths**

In a race, each of the four greyhounds run at its own constant speed. They all start at the same point on a circular track and at 30 seconds into the race, while all are still on their first lap, they have spread out so they are at four corners of a square. How many seconds ...

**Maths**

In the country Fivethree, they have only $3 and $5 notes. How many amounts, from $1 to $100 inclusive, cannot be made up exactly with these notes? A. 2 B. 3 C. 4 D. 7 E. 21

**chemistry**

A single, neutral iodine atom has

**College Physics**

A car of mass 1000 kg is traveling at a constant 25.0 m/sec along a straight, level highway. There is a force of thrust acting on it in the forward direction (the direction the car is moving) of 3000 N. There are drag forces and forces of rolling friction opposing the motion ...

**Math**

A water cooler can hold 40 litres of water when full what fraction of water is left in the cooler if 16 litres is used?

**geometry**

Jose is planning to spread fertilizer on his rectangular yard.His yard has a length of 40 ft and width of 25 ft.How much fertilizer does he need

**Math**

Printer A prints 50 cards per minute while Printer B prints 40 cards per minute.How long will it take both printer working simultaneously to print 1350 cards together?

**math**

a , c and d @steve

**math**

Select the equation in which the graph of the line has a positive slope, and the y-intercept equals -8. Question 1 options: 5x + y = 50 5x - 10y = -12 x - 2y = 10 10x - 5y = 40

**math**

100 ft rope is cut in two pieces so that the larger piece is 2 less than twice the shorter piece. What is the length of the larger piece?

**math**

What would you need to multiply by in order to solve this system of equations using the linear combination (elimination) method? {6x?2y=4 7x+5y=3 Multiply the 1st equation by 3 and leave the 2nd equation alone. This will eliminate the y's when you add the two new equations...

**English**

cultural

**English**

The play "Latins in La-La Land" would be an example of _____. Question 8 options: A) Historical Theatre B) Political Theatre C) Cultural Theatre ** D) Commercial Theatre

**math**

that makes no sense to me

**math**

Which function grows the fastest for large values of x? f(x)=1.5x f(x)=8x f(x)=3x f(x)=4x2+3

**math**

add x^2 to each side? @steve

**math**

Jimmy began deriving the quadratic formula as shown. ax² +bx +c = 0 x² +b/ax+c/a=0 x² +b/ax=?c/a x² +b/ax+(b/2a)² =?c/a+(b/2a)² What should Jimmy do next? Subtract x² from each side. Factor the trinomial. Add x² to each side. Subtract ...

**English**

i think its denouement

**English**

My bad. It was in "The little foxes"

**English**

A raisin in the sun. Regina allows Horace to die. A) Falling Action B) Climax C) Resolution D) Denouement

**Math Algebra**

Ann is 8 years older than Dawn. Dan is 5 years younger than Dawn. The sum of their ages is 108. How old is Dan? Please explain work too.

**chemistry**

How many grams of ammonia are produced when 32g of nitrogen react with excess hydrogen? N2 + 3H2 --> 2NH3

**LA**

What is the climax of Mieko and the fifth treasure.

**Physics **

Two pellets, each with a charge of 0.80 microcoulomb (8.0×10?7 C ), are located 2.8 cm (2.8×10?2 m ) apart. Part A Find the electric force between them.

**algebra**

What is the domain for f(x)=8(2)^x

**life**

what is gay?

**Math**

Hi Steve Actually the diagram given is already drawn in 2D!. I couldnt figure out that if I think in 3 D then T is above point A and will make a right angle with the lines AB and AC Thanks so much for opening my eyes and helping me visualize the diagram from a different angle...

**Math**

Thanks Steve, BUt How do you know its a right angled triangle so that you can apply tan

**Math**

A, B and C are 3 points on the level ground.B is due south of A . The baering of C from A is 085. A vertical mast of height 50m stands at A. The angle of elevation of T from B is 44 and the angle of elevation of T from C is 28 Calculate AB,AC, CB

**Algebra**

The Community Recreation Center is developing plans for a new sports facility. Community members can submit suggestions for the new facility, along with basic scale drawings of their ideas. Elena wants to include a new 15- by 30-meter basketball court in the athletic center. ...

**Civil Rights History**

I am stuck on a homework question, and I can't seem to find any information on this. Which organization was considered by many African-American leaders as the most progressive toward civil rights issues in the 1930s? a. Communist Party of the USA b. Republican Party c. ...

**Chemistry**

How much oxygen (in grams) will form from 44.2 mg of N2O5? 2N2O5(s) ? 4NO2(g) + O2(g) ____× 10^-3(g) O2

**PHYSICS**

A person with the weight of 691 N stands on a bathroom scale in a motionless elevator. The elevator begins to move and the scale momentarily changes to 499 N. (a) Draw a force diagram of the situation. (b) Create a qualitative vertical equation for this situation. (c) ...

**geometry**

The foot of a 25-foot ladder is 15 feet from a wall. If the ladder is pushed until its foot is only 7 feet from the wall, how much farther up the wall is the ladder pushed?

**math**

The box and whisker plot below shows the numbers of text messages received in one day by students in the seventh and eighth grades at Lincoln Middle School.

**Science**

Granite lasts a long time when it is used for building in areas where

**math**

A triangle has vertices at S(4,1), T(2,-3),and U(4,0). The triangle is translated up 3 units. What are the coordinates of the vertices of the image?

**chemistry**

A mixture of H2(g) and N2(g) has a density of 0.221 g·L?1 at 301 K and 501 torr. What is the mole fraction composition of the mixture?

**Social Studies**

It is D

**maths**

Georgia spent 1÷5 of her money on sweets and used the rest to pay for her savings. What fraction of her money did she pay as saving?

**stats**

Based on data from a statistical abstract, only about 10% of senior citizens (65 years old or older) get the flu each year. However, about 27% of the people under 65 years old get the flu each year. In the general population, there are 15% senior citizens (65 years old or ...

**Chemistry**

jk

**Exponential**

In 1626, Peter Minuit traded trinkets worth $24 for land on Manhattan Island. Assume that in 2014 the same land was worth $4 trillion. Find the annual rate of interest compounded continuously at which the $24 would have had to be invested during this time to yield the same ...

**math**

The graphs of ? f(x)=?5/3x+9 ? and ? g(x)=2^x?1? intersect at (3,?4) . What is the solution of ?5/3x+9=2^x?1 ? Enter your answer in the box.

**math**

What is the solution of the system of equations? y=5/6x+1 ?x+y=2 Enter your answer in the boxes.

**math**

What is the solution of the system of equations? 13x?6y=2 3x?4y=?10 Enter your answer in the boxes.

**math**

A birch tree that is 4 ft tall grows at a rate of 1 ft per year. A larch tree that is 6 ft tall grows at a rate of 0.5 ft per year. Let the variable t represent time in years and h represent height in feet. In how many years will the trees be the same height? Which system of ...

**math**

What is the solution of the system of equations? 13x?6y=2 3x?4y=?10 Enter your answer in the boxes.

**math**

Solve. 2d?e=7 d+e=5 Use the linear combination method. The solution is (3, ?1) . The solution is (4, 1). There are infinitely many solutions. There is no solution.

**math**

b?