# Posts by johnny

Total # Posts: 532

**Trigonometry**

a^2 = b^2 + c^2 - 2bc x cosA a^2 = 100^2 + 120^2 - 2(100)(120) x cos(45) a^2 = 10,000 + 14,400 - 24,000 x cos(45) square root of a^2 = square root of 11792.27227 a = 108.59

**math**

building lot in a city is shaped as a 30° -60° -90° triangle. The side opposite the 30° angle measures 41 feet. a. what is the length of the side of the lot opposite the 60° angle b. what is the length of the hypotenuse of the triangular lot. c. what are ...

**History**

thank you for your help Damon

**History**

Why do you think state and local governments have a major role in providing important services? Why doesn't the federal government take on more of this role?

**Chemistry**

calculate the concentrations of H2S04, H30+, HSO4- and SO42- in 0.4 M H2S04 solution

**Finite math**

Consider the following annuity scheme: regular payments of $200 are made every two months at the end of the month (in other words, there are six equally spaced payments over the year) into an account with a nominal rate of 6% compounded monthly. Note, this is not an ordinary ...

**algebra**

Justin rode his bicycle to a park located 4 2/3 miles from his house.he returned along the same route. After riding 9 1/8 miles total, how many more miles does justin need to ride to reach his home?

**science**

You normally drive the south expressway between Calubang and Magallanes at an average velocity of 105km/hr (65mi/hr), and the trip takes 2 hours and 20 minutes. On a Monday morning, however, heavy traffic slows you down and you drive the same distance at an average velocity of...

**Math**

A square plot of land has an area of 1,156 square feet. What is the perimeter of the plot?

**Social studies**

Why was the mayflower compact so significant?

**English literature**

WTF( wow that's fantastic ) 😃😃😃

**Algebra**

Been working on this problem for nearly 45 minutes now, totally confused. 4.5x - 6.7y = 8.6 3.8x +2.2 = y

**math**

its ok, i just didn't know how to verify if there was a horizontal asymptote and I didn't know that x=-1 is hole, thank you for the help!

**math**

Given the function f(x)=x^3-2x^2-5x+6/x^2+3x+2 a) Determine algebraically the equation for any asymptotes (HA, VA and or OA) b)State the domain of the function c)State the behaviour of the function at each of the asymptotes

**math**

is there any other way to find the maximum profit

**Math**

An only son inherited a 3/4 hectare lot. He decided to build a 40-door condominium on the lot. The floor are of the units is uniform and the total floor area of the entire condominium is 1/5 less than the area of the lot to provide for certain amenities. What is the floor area...

**Trigonometry**

Get back to ELP wimp.

**Chemistry**

What's the formula for Li2Co3+Co(NO3)3(aq) ->

**Math**

Use three rectangles of equal width and the left endpoint approximation method to estimate the area enclosed by the x-axis, the lines x = 1 and x = 4, and the curve y = x^(1/2). Could you please help me understand how to do this? Thanks in advance!

**Math**

An area is bounded by the x-axis and the parabola y = 16 - x^2. Use four rectangles of equal width and the midpoint approximation method to estimate the bounded area. Could you please show me how to work out this problem? Thanks!

**math**

1200

**math**

Martha rides 29 miles everyday on her bike about how many miles did she ride in 6 weeks

**math**

Martha rides 29 miles everyday about how many miles does Martha ride in 6 weeks

**Physics**

A spiral spring of nature 20cm,has a scale pan hanging freely in its lower end. When an object of mass 40g is placed in the pan,its length becomes 21.8cm.when another object of mass 60g is placed in the pan,the length becomes 22.05cm. Calculate the mass of the scale pan

**Math**

Milo's pancakes recipient makes 9 serving. It's calls for 3/4 cup milk.Milo's wants to make 6 serving. How much milk will he needs.

**Math**

In Kelly's career on the basketball team, she made 7 out of every 10 free throws. Last season, she made 168 free throws. How many free throws did she attempt?

**math**

I do not know

**math**

5/8+3/8=8/8

**math**

Mr. Angulo buys 5/8 pound of red grapes and 3/8 pound of green grapes. How many pounds of grapes did mr.angulo buy in all?

**algebra 1**

simplify (0.4)3

**Physics**

A student drops a lead ball 4" in diameter from the top of a large live oak tree. As the ball is falling, a bird flies under it, slowing the ball's velocity to 30 feet/sec. Two seconds later the ball strikes the ground. What is the coefficient of friction due to air ...

**Science**

100% Yay thanks smile more

**Literacy**

1.Write the participle in the sentence. Why do you need a new pair of hiking boots? My answer - NEED 2.Write the first and last word of the participial phrase. My answer - BEGINNING 3.Write the first and last word of the participial phrase. Disappointed by the lack of ...

**chemistry**

What mass of carbon dioxide can be produced from 4 moles of sodium bicarbonate according to the following unbalanced reaction, NaHCO3 --> Na2CO3 + CO2 + H2O?

**algebra 1**

graph the function for the domain of 3x -y=1;D:(-3,-1,0,4)

**physics**

A uniform horizontal beam 5.00 m long and weighting 2.88 102 N is attached to a wall by a pin connection that allows the beam to rotate. Its far end is supported by a cable that makes an angle of 53.0° with the horizontal (Figure (a)). If a person weighing 5.99 102 N ...

**Chemistry**

A sample of oxygen occupies 38.9L at STP. What will the pressure need to be in Torr. if the volume is to be changed to 32.2L without a change in T. Is this P1V1/T2=P2V2/T2? How would I set it up.

**physics**

An airplane is travelling at a speed of 600 mph on a heading of 345 degrees. There is a wind moving at a speed of 70 mph on a heading of 20 degrees. The pilot would like to maintain his planned course. Find the speed and heading he should set in order to travel with the wind ...

**Physics**

What average power would a 1.20 multiply.gif 103-kg speedboat need to go from rest to 18.0 m/s in 4.79 s, assuming the water exerts a constant drag force of magnitude fd = 5.34 multiply.gif 102 N and the acceleration is constant?

**History**

After 1815, the quest for natio al self-determination posed a grave threat to the____ empire with its many and potentially dissatisfied nationalities.

**physics, please help**

An object of mass m can slide without friction on a tabletop. A horizontal string tied to the object passes through a frictionless hole in the table and is connected to a second, hanging mass, M. If m is put into motion so that it moves in a circular path of radius r, find a) ...

**chemistry (Organic)**

According to the two reactions below; 1-chloro-2,2-dimethylbatune + (warm NaOH 3)) 1-chloro-2-methylpropane + (cold dil.NaOH) 1) identify whether the reactions are Nucleophilic Substitutions (SN) or Elimination (E) reaction. 2) Complete the reaction mechanismin each and name ...

**physics**

10. The drawing shows a baggage carousel at an airport. Your suitcase has not slid all the way down the slope and is going around at a constant speed on a circle (r = 12.4 m) as the carousel turns. The coefficient of static friction between the suitcase and the carousel is 0....

**Math**

Jamie brought $72 more than Sally brought. Tia and Sally brought the same amount of money. Sally brought $50 more than Kelly brought. If their total souvenir money did not exceed $502, what is the greatest amount of money Jamie could have brought?

**Plz help with literature**

The Most Dangerous Game Directions: Each question has a different point value. (134 total) As always, answer in complete sentences. Use the back of the sheet or your own paper. DO NOT CRAM ANSWERS ON THIS SIDE OF THIS SHEET! (5) 1. What do you admire or dislike about Rainsford...

**U.S. History**

Why is each topic historically significant and what impact did it have on colonial development? Algonkian- Iroquois/Haudenosaunee- Mestizo- Encomienda- Canary Islands- Maize Cultivation- Pueblo- Thanks

**Science**

How much heat is produced when the body metabolizes a gram of trioleylglycerol?

**precalculus no clue**

Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given. a =^3 ; r =^3

**Math - Polynomials**

off-topic: yay it's friday :D Simplify each polynomial. 1. 6g + 8k + 9g + 2k A) 3g + 10k B) -3g + 10k *** C) 17gk D) 10k - 3 2. -4x + 6x2 + 5x A) 7x^3 B) 6x^2 + 9x *** C) 6x^2 - 9x D) 6x^2 + x 3. a^2 + 5a - 3a^2 A) 5a + 2a^2 *** B) 5a - 2a^2 C) 2a^2 + 5a D) 5a - 3a^2 Are ...

**English Ms Sue/Writeacher**

Sure! What is it?

**English Ms Sue/Writeacher**

So, yes, D would be your answer.

**English Ms Sue/Writeacher**

D is incorrect, the comma after "was" is not needed.

**chemistry**

how much copper sulfate do i need to make a solution of 100ml of 1M copper sulfate?

**chemistry**

is the reaction between Copper sulfate and zn exothermic or endothermic and does that involve the activity series?

**algebra**

you and me

**NEED HELP ASAP PHYSICS@!!1**

Tarzan (m = 78.4 kg) tries to cross a river by swinging from a vine. The vine is 10 m long. Tarzan doesn't know that the vine has a breaking strength of 1045 N. What maximum speed (in m/s) can Tarzan have at the bottom of the swing (as he just clears the water) in order to...

**NEED HELP ASAP PHYSICS@!!1**

A person is flying a model airplane with mass 82.2 gram in a horizontal circular path on the end of a string 10.5 m long. The string is horizontal and exerts a force of 3.22 N on the hand of the person holding it. What is the speed (in m/s) of the plane? PLEASE PLEASE PLEASE ...

**physics**

Friction provides the force needed for a car to travel around a flat, circular race track. What is the maximum speed at which a car can safely travel if the radius of the track is 80.0 m and the coefficient of friction is 0.43?

**Chemistry**

What is the volume of 20.55 grams of hydrogen gas at a pressure of 1.215 atmospheres at 29.3 degrees Celcius? how do you solve this

**Statistics**

56

**physics**

A wheel starts from rest and rotates with constant angular acceleration to an angular speed of 9.3 rad/s in 1.39 s. Find the magnitude of the angular acceleration on the wheel

**math**

kellys dog eats 1 2/3 bones in 10 days. How many bones will he eat in 18 days?

**Physics**

An object moves in a circular path at 861 rpm. If the radius of its circular path is 9.27 meters, calculate a) the distance traveled in one complete revolution d = m b) the time it takes for one complete revolution T = seconds c) the linear speed of the object as it moves in a...

**Physics**

What is the vector product of A=2i + 3j + 1k and B=1i - 3j - 2k?

**Math**

There are 25 plants in arts garden. There are four times as many tomato plants as bean plants. How many tomato and bean plants are there?

**Physics**

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy 1.80x10^-21J. What angle ...

**Physics**

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy 1.80x10^-21J. What angle ...

**Math**

Katie measures that 6 1/2 pieces of model plane parts were five in one fifth inches long how long is each piece

**physics**

A neutron with a mass of 1.67x10^-27 kg traveling east with a kinetic energy of 2.00x10^-21J collides perfectly elastically with helium nucleus with a mass 6.68x10^-27 kg that is initially at rest. After the collision, the neutron has a kinetic energy 1.80x10^-21J. What angle ...

**Math**

Groups in math class have 4 green marbles, 6 yellow marbles, and 10 black marbles. Each group pulls out a marble, records it, and then replaces it 50 times. The class complies its data. how many times can you expect to pull out a green marble with 1000 pulls?

**Math Calc**

Given a right triangle ABC with a=13 and b=26, find the value of angle A, angle B, and side length c. Round to the nearest thousandth.

**HELP! - Physics**

I need help with this. A frustrated farmer is trying to move a large rock from his land. The stone has a mass of 1275 kg. By using a piece of board as a lever and a fulcrum the farmer will have a better chance of moving the rock. The farmer places the fulcrum 0.288 m from the ...

**Calculus**

167.5516

**physics**

Two people jump out of an airplane. They hold on to each other while falling straight down at a shared terminal speed of 60.7 m/s. Suddenly, they push away from each other. Immediately after separation, the first skydiver (who has a mass of 89.3 kg) has the following velocity ...

**physics**

An astronaut comes loose while outside the spacecraft and finds himself floating away from the spacecraft with only a big bag of tools. In desperation, the astronaut throws his bag of tools in the direction of his motion (away from the space station). The astronaut has a mass ...

**Physics**

A crate sets on wooden horizontal surface (a wooden floor). The figure shows a top view of this looking down onto the crate (gravity would be acting into the page). Man one and man two apply forces F1 and F2, at angles of θ1 and θ2 respectively, with the goal of ...

**History, Urgent**

Odysseyware "does" suck

**physics**

I am struggling with this. A wombat of mass 22.0 kg starting at rest slides 13.0 m down a tree at a speed of 5.80 m/s just before reaching the bottom. (a) What is the change in the gravitational potential energy of the wombat during the trip? (b) What is the wombat’s ...

**physics**

We do not know the mass of block. The angle of the ramp going down is 44.3 degrees and after it goes across the horizontal surface, it goes up a second ramp at 24.5 degrees

**physics**

I am having great difficulty with this question. A block is placed on a frictionless ramp at a height of 12.5 m above the ground. Starting from rest, the block slides down the ramp. At the bottom of the ramp, the block slides onto a frictionless horizontal track without ...

**Math Problem (please help)**

A theater has room for 100 people inside. During the last show, the theater was only filled 60% capacity. How many tickets were not sold for the last show?

**psych 42**

The mean (μ) of the scale is 55 and the standard deviation (σ) is 7. Assuming that the scores are normally distributed, what PERCENTAGE of the population scores are above 59?

**Analytic Geometry**

Find the vertices, foci, eccentricity and length of the latus rectum of the ellipse whose equation is x^2 + 9Y^2 = 9

**language arts**

So is contention an wisdom the answer?

**math**

5. There are x dictionaries in a bookstore. After 1/8 of them were purchased, 10 more dictionaries were shipped in bringing the total number of dictionaries to 52. What is the value of x?

**math**

If n>0, then (4^n)(8^n)= A.2^9n B.2^8n C.2^6n D.2^5n E.2^4n

**math**

Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1.5 hours. How quickly can all three fill the pool together? A.12 minutes B.15 minutes C.21 minutes D.23 minutes E.28 minutes I got 53 minutes, but ...

**math**

6. In a residential building, the ratio of man and woman is 5 to 8. In August, there are 30 men and 10 women moving out from the building. After that, the ratio of man and woman in this building is 1 to 2. How many men were there in the building before August 1? please show work.

**math**

If 12V=3W, and v(not equal)=0, then which of the following is equivalent to 2W-8V? A.0 B.4W C.-6W D.2V E.-2V please show work.

**math**

How many three-dight integers greater than 600 contain only odd digits?

**math**

2. James spends 10% of his money for movie; he also spends 20% of his money for his lunch. Then he buys $20 in his office supplies. In the next day, he spends $10 for his breakfast. Now he leaves 40% of his original money. How much does he save originally? please show work.

**math**

Mr. Brown sold a jacket for $240, this making a profit of 20% on his cost. Later, he sold another jacket for $240 this time suffering a loss of 20% on his cost. The result of the two sales was A.He gained $40.00 B.He gained $10.00 C.He lost $20.00 D.He lost $10.00 E.He gained...

**math**

2.If the largest of 7 consecutive integers is 25 what is the average of the 7 integers? A.24 B.22 C.21 D.20 E.16 I got E, this is my work: 7x+21/7=25 7x+21=175 -21 -21 7x=154 x=22

**math**

Janelle has $20 and is saving $6 per week. April has $150 and is spending $4 per week. When will they both have have the same amount of money? please show work,

**math**

6. If each of eight biology classrooms is in use for 5 hours and 15 minutes per day, and total of 84 student experiments are done, how long does each experiment take on average? A.20 minutes B.30 minutes C. 40 minutes D.50 minutes E.1 hour please show work.

**math**

A company wants to send out a mailer. A mailer be sent only if it has an envelope and a stamp. For the number of mailers printed, the company has only 1/2 the number of envelopes needed. Of those mailers for which there are envelopes, the company has only 1/3 the number of ...

**math**

9.If 1/4 the recommended daily requirement of vitamin P is 2 ounces, what is the total recommended daily requirement of vitamin P? please show work.

**math**

Ex 12: The smallest of five consecutive integers is represent by y-3. What is the largest of these integers, in terms of y? please explain and show work.

**math**

15. The sum of five unequal whole numbers is 90. The second largest of these five numbers can be at most A.19 B.41 C.43 D.89 please explain and show work.

**math**

Rico works for a landscaping company. He will enclose a square garden, using a full 50 ft roll of wire fencing. What could the largest dimension of the garden be? Sketch and label the garden, then calculate perimeter to verify your answer.