# Posts by Mack

Total # Posts: 298

**math help please check my answer**

A roofer is standing on the roof of a house 60 ft above the ground. His truck is parked 25 ft from the house. What is the angle of depression from the roofer to his truck? Round to the nearest whole degree. 22° 23° 67° 68° <my answer choice

**Sociology**

According to Parsons, evolutionary change occurs through a two step process involving A) the ideational and the sensate B) differentiation and integration C) core societies and peripheral societies D) industrialization and modernization

**MATH**

A TAXI CAB COST $1.25 FOR THE FIRST MILE AND $.25 FOR EACH ADDDITIONAL MILE. how many miles can be traveled in the taxi for $8.00? M= number of miles traveled.

**algebra**

jack can mop a ware house in ten hours. one day his friend Jimmy helped him and it only took 4.44 hours. How long would it take Jimmy to do it alone?

**pre-calculus**

two gears are connected by a belt. the large gear has a radius of 20cm while the small gear has a radius of 10cm. if a point on the small gear travels at 16 rpm (revolutions per minute), find the angular velocity of the large gear. Tip: first find the velocity of the belt

**science**

Flight simulators are used to train new pilots because ____.

**Physics**

A spinning wheel is slowed down by a brake, giving it a constant angular acceleration of −4.60 rad/s2. During a 2.60-s time interval, the wheel rotates through 85.4 rad. What is the angular speed of the wheel at the end of the 2.60-s interval?

**CHEMISTRY**

Using a 0.20 M phosphate buffer with a pH of 6.5, you add 0.72 mL of 0.46 M NaOH to 58 mL of the buffer. What is the new pH of the solution? (Enter your answer to three significant figures.) I don't even know where to begin!! I just need a set up of the problem - without ...

**physics**

How much thrust is required to launch a 5 kg bottle rocket with an upward acceleration of 6.4 m/s2? I've gotten 32 because F=MA but I don't understand how to account for gravity. Please help!

**Social Studies**

What did Clinton mean by "a dear bought victory, another such would have ruined us"

**Math**

Thank you so much Rachel!

**Math**

10 ÷ 4/5

**engineering science N4**

A steel block is resting on a Flat plank 6m long ,and how high can one end of a plank be lifted For the block to start to move,if the coeficient of friction is 0.3

**Math**

The distance

**Math**

How do you solve (5,-1) -(2,-6) ________ (?,?)

**Math**

How to plot (0,-2)

**Math**

A door frame that appears rectangular has height 80 in., width 32 in., and one diagonal that measures 86in. Is the door frame actually rectangular?

**Math**

A circus performer walks on a tightrope 25 ft above the ground. The tightrope is supported by two beams and two support cables. If the distance between each beam and base of its support cable is 15 ft, what is the length of the support cable?

**New Consumer Math**

Luis Giron works at the Pancake Palace from 3:00 p.m. until 12:15 a.m. 5 nights a week. If he takes a 30-minute break each evening, how many hours per week does he work?

**math**

p-1= 4. P= ? To solve it with addition only in algebra we do it the oppiste e=way and backwards. So our question, Cora Evans, is really just 4 + 1 = 5 P = 5

**math (fractions)**

Three people share a sum of money. The first receives 2/7 and the second receives a 2/5 share of the money. What fracion does the third receive?

**Math**

An object is projected vertically upward from the top of a building with an initial velocity of 144 ft/sec. Its distance s(t) in feet above the ground after t seconds is given by the function s(t) = −16t2 + 144t + 120. A) Find its maximum distance above the ground. (in ...

**physics**

343 into 7.7

**AP US History**

One of the ironies of World War I was that in a war 'to make the world safe for democracy,' the government attacked the civil liberties that make democracy possible.

**Math**

Each fence section has a post at each end. How many posts are needed to build a fence with 10 sections? Is it 8, 11, 10 or 9 posts ?? Please explain to really want to understand this!!

**Probability**

Roberto has 10 different colored sheets of paper and 3 different colored envelopes. How many different letters can he make consisting of one colored sheet of paper and one colored envelope??? Please explain!

**alg 1 college**

thx you steve

**alg 1 college**

can you guys please help me wwith a math problem, its asking to solve this equatoion, sqare root5x-4=3x-18. to fkire off first 5x-4= 3x-18 squared. foil thatand you are looking AT 9x squared -54x -54x+324/ add the -54 to 108x.then shoot the 5x to to the 108x and subbtract 5x ...

**business**

These are all right! Thanks 400!

**statistics**

A company markets educational software products, and is ready to place three new products on the market. Past experience has shown that for this particular software, the chance of "success" is 80%. Assume that the probability of success is independent for each ...

**Physics**

A 90 kg mover climbs a ladder to a height of 8 m in 32 s. Find the power rating of the mover. I solved by using P= mgh/t and came up with 220.5 watts. Is this correct or am I suppose to use P=w/t and not use gravity in the equation?

**physics**

A 90 kg mover climbs a ladder to a height of 8 m in 32 s. Find the power ratingof the mover. I solved by using P= mgh/t and came up with 220.5 watts. Is this correct or am I suppose to use P=w/t?

**physics**

A 500g ball is dropped into a well that is 10m deep. A)What is the ball's potential energy before it is dropped? Take the bottom of the well to be at zero height. I solved by using PE=mgh and came up with 49J. B) What are the kinetic energy and potential energy when it has...

**Physics**

A 500g ball is dropped into a well that is 10m deep. A)What is the ball's potential energy before it is dropped? Take the bottom of the well to be at zero height. I solved by using PE=mgh and came up with 49J. B) What are the kinetic energy and potential energy when it has...

**physics**

God Bless you! I have been agonizing over this for some time. Thank you so much!

**physics**

A 160g stone, tied to a thread, swings in a horizontal circle with a 100 cm diameter. If the maximum tension the thread can withstand before snapping is 28n, find the A) Maximum speed of the stone. B) Acceleration of the stone at this speed. For A I used V=sqrt (r)(F)/m and ...

**Physics**

I solved B. by a=V^2/r and came up with 312.5 m/s^2. Does this look right?

**Physics**

A 160g stone, tied to a thread, swings in a horizontal circle with a 100 cm diameter. if the maximum tension the thread can withstand before snapping is 28 N, find the A) Maximum speed of the stone B) Acceleration of the stone at this speed. I solved A with V= sqrt of rT/m and...

**physics**

Thanks you bob pursley. You got me in the right direction. I solved mass by w/g. I did not know force. I see now that the problems required an answer from the previous one to solve.

**physics**

A ball weighing 1.78 N is shot through a launcher, achieving a speed ( from rest) of 41 m/s in 0.28 s. A) What is the mass of the ball? B) What is the acceleration of the ball as it moves through the launcher? C) What average force acted on the ball to make it accelerate?

**physics**

I have the formula down ok. My problem is with the exponents. G = 6.67 x 10^-11. M1 and m2 = 25,000,000. I wrote down m1 and m2 as 2.5 x 10^7. I multiplied 6.67 by 2.5 and come out with 16.67. I do not know why but I know I need to move the decimal point over and come up with ...

**physics**

the centers of two 5000 kg blocks are separated by 1.13 m. What is the gravitational force between the two blocks? What must be the distance between the centers of the blocks if the gravitational force decreases 25 times?

**statistics**

What SPECIFIC statistical test would be applied to these data collected to answer the following questions? What’s the average amount of pain Mr. Smith reported yesterday? Is there a significant difference in depression levels (using a scale of 0-60) between pts who take ...

**geometry**

It's 6.

**physics**

what is the momentum of a cart with a mass of 30 kg which is moving at rate of 54 km/hr?

**physic**

A football is kicked stright up into the air it hits the ground in 4.6 sec later, what was the greatest height reached?

**7th grade math**

If you have trouble on this question is is -15 and I know that for a fact

**chemistry**

what products would be formed if glycerol were combusted? wright a balanced equation for the combuntion reaction of glycerol (C3,H8,O3).

**Algebra 2**

n is 2 given that it is even directions: let n be a randomly selected integer from 1 to 20 find the indicated probability

**Trig**

What is the vertical asymptote of y=tan(x-pi/3)?

**Trigonmetry**

If an airplane is traveling at 750 mph bearing of S 65 W for 3 hours how far will the plane travel? And what bearing should they travel home?

**Algebra**

Ameter stick casts a shadow 1.4 m long at the same time a flagpole casts a shadow 7.7 m long. The triangle formed by the meterstick and its shadow is similar to the triangle formed by the flagpole and its shadow. How tall is the flagpole?

**Science**

Xhdhfh

**Statistics**

The mean serum cholesterol level in the population of males who do not develop heart disease is known to be 219 mg/100 ml. Suppose you perform a study to investigate whether the mean serum cholesterol levels in males who do develop heart disease is higher than that of the ...

**mathmath**

the question is posted correctly. the question only gives percentages and nothing else.

**economics**

1. Use the following information to answer the questions below: Quantities Produced Prices CDs Tennis Racquets CDs Tennis Racquets Year 2004 100 200 20 110 Year 2005 120 210 22 120 a. Calculate real GDP using prices from 2004. By what percent did real GDP grow? b. Calculate ...

**HSM/220**

I will like to no detailing how a human service organization focused on providing job skills to high school dropouts would address the following: • Statement of opportunity • Impact of organizational structure • Community and environmental factors • Human ...

**science**

what is silica content of earths crust under the oceans?

**math**

-2(18+19)8th x 19 +18 divided by 9 seventh power x 6

**7th grademath**

could it be 22

**MATH HELP!**

HELP! I REALLY NEED HELP IN BASIC SKILLS MATH! Can you please find me a GOOD web site that will help me in random basic skills math?

**Physics**

A runner weighs 560 N (about 130 lb), and 74% of this weight is water. (a) How many moles of water are in the runner's body? moles (b) How many water molecules (H2O) are there? molecules

**Math**

Open Ended Nick is starting college in the fall. She has purchased a Star Phone card for $30.00for long didtance calls. The calls cost 10 cents per minute nation wide during the daytime, 6 a.m - 6 p.m and 5 cents per minute nationwide at night, 6 p.m-6a.m. Every day Nick ...

**Math**

To confuseing I need help. In honor of school spirit week, the student council decided to decorate lockers in the main lobby. The 9th graders officers stuck a decal of Smiley, the school mascot, on every third locker, starting with the third. The 10th graders officers taped a...

**Math**

Open ended Need HELP PLEASE!!! Mr.Guy isfinishing his patio. The Patio is 14ft. by 4yds. -If each square tile is 2 by 2, how many will he need? -If the tile is 5 dollars each, but he gets every 5th one free, how much will it cost? -If tiles are also sold in boxes of 15 that ...

**Math**

Open Ended Electronic City pays its starting employees $8.50/hour. After 6 months, employees get a choice of how they would like to be paid. They can choose from one of the following plans: Plan A: Remain at $8.50/hr, working 40 hours a week. Plan B: $200/wk plus 3% ...

**American Sign Language**

What is a asl classifier for President? What is a asl classifier for woman? What is a asl classifier for letter? What is a asl classifer for brother?

**English 4**

what are the steps in writing a good essay?

**African Amer. Study**

What was the aim of the American Colonization Society?

**African American History**

I needed to put these in chronological order: David Walker's appeal, American Colonization Society formed, Paul Cuffe leads African American to Sierra Leone. I wrote American Colonization Society formed for 1, Davis Walker's appeal for 2, and Paul Cuffe leads African ...

**African Amer. Study**

Who lead the most forceful strategy in order to bring an end to slavery?

**African Amer. Study**

What was the name of the abolitionist paper of William Lloyd Garrison?

**African Amer. Study**

Who was the 1st American woman to address male audience in public?

**African Amer. Study**

Who was involved in the Baltimore Alliance?

**African Amer. Study**

In what year was the first female anti slavery Established?

**African Amer. Study**

Where and When was the 1st female anti- slavery established?

**African Amer. Study**

What was the Baltimore Alliance?

**African Amer. Study**

What's another name for Jack Pritchard?

**African Amer. Study**

Who published Freedom's Journal?

**African Amer. Study**

But does she relate to African American Study??

**African Amer. Study**

Who was the first women to address male audience in Public?

**African Amer. Study**

Now I wrote: Methodists,Baptists,Unitarians,Episcopalians or Catholics. Is that correct?

**African Amer. Study**

What was the religious groups that was associated with abolitionism?

**African Amer. Study**

No i did not have choices on my test. Is the answer Harriet Beecher Stowe?

**African Amer. Study**

No I did not have choices on my test. Is the answer Harriet Beecher Stowe.

**African Amer. Study**

Who led the most forceful strategy in order to bring an end to slavery? I wrote William Lloyd Garrison on my test and my teacher marked it wrong. I need help with this one.

**African Amer. Study**

What was the name of the abolitionist paper of William Lioyd Garrison? I just wrote the name of the paper was William Lloyd Garrison because I did'nt know the answer and so my teacher marked it wrong.

**African Amer. Study**

I had to put this in Chronological order. David Walker's appeal, American Colonization Society formed, Paul Cuffe leads African American to Sierra Leone. I put Paul cuffe leads African Americans to Sierra Leone for 1, David Walker's appeal for 2, and American ...

**African Amer. Study**

The first rebellion was Gabriel in 1800. 2nd was Charles Deslande in 1811. 3rd was Denmark Vesey in 1822. And 4th was Nat Turner in 1831. Thank you. That's correct right?

**African Amer. Study**

Who's rebellion came first? Gabriel,Nat Turner,Denmark Vesey or Charles Deslande. I choose Nat Turner for 1, Charles Deslande for 3, Denmark Vesey for 2,and Gabriel for 4. My teacher marked it all wrong. What did I do wrong?

**african american hist.**

what were the origins of the indentured system? how did it evolve into plantation slavery?

**u.s hist. 2**

what was the reconstruction policies regarding social, economic and political equality of african Americans up through and including the Plessy v. Ferguson case?

**u.s hist. 2**

what were the political and social changes made by the Progressives?

**u.s hist. 2**

what were all the circumstances and events leading up to the development og the Open Door Policy?

**african american hist.**

What was the role of the free black community in boston? What were the contributions of Peter Salem, Salem Poor, Prince Hall, Phillis Wheatley and Benjamin Banneker?

**african american hist.**

what year was back men able to vote?

**african american hist.**

how did europeans profited at the expense of African Americans during the era of the Atlantic slave trade?

**African Amer. Hist.**

I need websites on these: What was the slave ship capacity? Who was Ghana's King? Lexington and Concord What was Andrew Jackson's feelings toward black troops? Federalist and slave issues

**african american hist.**

What was a trade system?

**Math**

yes it's miles per hour and no its not a 24 hour day because I'm only traveling at night so that would make it a 12 hour day right?