# Sierra

Popular questions and responses by Sierra-
## trig

How do you find the exact value of sin 5pi/8?

*asked on November 7, 2012* -
## Math

The country hall charges a rental fee of $1000 and at least $3000 for food. Olivi is planning a class reunion. If she had chosen a buffet that costs $38.56 per person what is the minimum possible number of people who must attend to support the expense?

*asked on October 29, 2016* -
## Earth Space Science

the horizontal distance between a crest to the next trough of an ocean wave is 5 meters. what is the wavelength of the ocean wave? A)2 meters B)5 meters C)10 meters D)20 meters I think its 10 meters but im not so sure, I would like to make sure.

*asked on March 28, 2015* -
## Math

In the rhombus, angle 1=15x, angle 2=x+y, and angle 3=30z. Find the value of each variable.

*asked on March 10, 2014* -
## algebra 2

Let f(x)=5x^3-2x and g(x)=3x^3.Preform the operation given and state the domain. A. F(x)+ g(x) B. F(x) - g(x) C. F(x) • g(x) D. F(x) / g(x) E. f(g(x)) F. g (f(x)

*asked on November 7, 2016* -
## American Government

Which statement does NOT characterize Martin Luther King Jr.'s "I Have a Dream" speech? 1.)It openly criticized the Governor of Alabama 2.)It supported the peaceful congregation of peoples of all races and religions 3.)It pointed out racial problems in the

*asked on February 14, 2012* -
## physics

The 2 kg block in Figure 7-25 slides down a frictionless curved ramp, starting from rest at a height of h = 3 m. The block then slides d = 12 m on a rough horizontal surface before coming to rest. Figure 7-25 (a) What is the speed of the block at the

*asked on January 30, 2011* -
## Geometry

The vertices of a triangle are P(-3,8), Q(-6, -4), and R (1, 1). Name the vertices of R (smaller letters)y-0 (triangle PQR). A. P'(-3, 8), Q'(-6,-4), R'(1,1) B. P'(-3,-8), Q'(-6,4), R'(1,-1) C. P'(3,-8), Q'(6,4), R'(-1,-1) D. P' (3,8), Q'(6,-4), R'(-1,1)

*asked on March 26, 2014* -
## Math

Line DF bisects angle EDG. Find the value of x. Line EF has 9x+114. Line FO has 15x. angle FDG has 32 degrees.

*asked on March 10, 2014* -
## Physics

If you combine 34 kg of ice at 0°C with 80 kg of steam at 100°C, what is the final temperature of the system? °C

*asked on July 31, 2012* -
## History

Explain the different functions of the aerospace centers in Houston and Cape Canaveral. I think this is the answer, can somebody please double check it. ***In Houston, Texas, the Lyndon B. Johnson Space Center is a place where visitors can see the history

*asked on May 2, 2019* -
## History

What were the Civilization Regulations of 1880 designed to do? A. Outlaw practices regarded as civilized by European American settlers B. Outlaw European American expressions of spirituality and cultural practices C. Provide guidelines for civilized forms

*asked on October 3, 2019* -
## Math

Each human hand has 27 bones. There are 6 more bones in the fingers than in the wrist. There are 3 fewer bones in the palm than in the wrist. How many bones are in each part of the wrist?

*asked on April 26, 2015* -
## chemistry

25. Which of the two reactions, A or B is a neutralization reaction? Explain why. A. HBr + H2O = Br- = H3O+ B. HClO + NaOH = NaClO + H2O 26. A. Look at the reaction again. when this reaction is reversed. Br- + H3O+ = HBr = H2O what substance is the acid,

*asked on September 16, 2014* -
## Physics

Electrons on a radio broadcasting tower are forced to oscillate up and down an antenna 535,000 times each second. Show that the wavelength of the radio waves that are produced is 561 m.

*asked on August 22, 2013* -
## Physics

a quaterback throws a ball to a stationary reciver wo is 15.2m down the feild. the football is thrown at an initial angle of 42 dagrees. acceleration is 9.81m/s^2. what is the initial speed that quaterback must throw the ball to hit the reciver?

*asked on October 23, 2012* -
## diagramming a sentence

In this sentence, "Yellowstone National Park is in Wyoming", is the word "in" the present tense verb?

*asked on January 14, 2010* -
## english

in line 16of "The Nymph's reply to the shepherd" in what ways does the speaker's word choice reveal a striking balance of opposite to illustrate the theme of the harmful effects of time?

*asked on September 16, 2015* -
## calculus

The operating cost, C, in dollars per hour, for an airplane cruising at a height of h metres and an air speed of 200km/h is given by: C = 4000 + h/15 + 15000000/h for the domain 1000 ≤ h ≤ 20000. Determine the height at which the operating cost is at a

*asked on March 31, 2015* -
## 7th grade math

The sum of an integer and the next greater integer is at the most 13. Write an inequality to find the lesser integer and solve for the lesser integer. My answer n+n+1

*asked on February 4, 2015* -
## chemistry

Hemoglobin is the oxygen carrying molecule of red bloods and contains 4 atoms of iron per molecule of hemoglobin. A sample of hemoglobin weighing 13.4 g contains 45.6 mg iron. What is the molecular mass of hemoglobin? I'm unsure of where to begin with this

*asked on October 24, 2014* -
## physical science

what is the density of a peice of wood that has a mass of 25.0 grams and a volume of 29.4cm cubes?

*asked on September 13, 2012* -
## Physics

The track near the top of your favorite roller coaster has a circular shape with a diameter of 36 m. When you are at the top, you feel as if you weigh only one-fifth of your weight on the ground. What is the speed of the roller coaster?

*asked on June 25, 2012* -
## Chemistry

aqueous sulfurous acid H2SO3 was made by dissolving 0.200 L of sulfur dioxide gas at 19 C and 745 mm Hg in water to yield 500.0 ml of solution. the acid solution required 12.9 ml of sodium hydroxide solution to reach the titration end point. what was the

*asked on February 20, 2011* -
## physics 11

brutus, a champion weightlifter, raises 240 kg a distance of 2.35 m. How much work is done by Brutus lifting the weights?

*asked on January 11, 2011* -
## math

find the missing numbers 1562 ----- ----- ---- ------ ----- 1874. they are number lines

*asked on September 28, 2009* -
## math

find the numbers 2493 ----- ------ ----- ----- 8008

*asked on September 28, 2009* -
## Geometry

If two lines are cut by a transversal in such a way that alternate interior angles are congruent, then the lines are parallel. Given: Use the lines and angles numbering system shown on page 156 in your online textbook. Alternate interior angles ∠3 and

*asked on June 27, 2019* -
## math

what is 7-y-y=-1 equal to?

*asked on October 15, 2018* -
## geography

the c0orn belt of the united states stretches from Ohio to Nebraska.

*asked on October 18, 2016* -
## Algebra

I have 6 bags with the same number of cookies. Altogether I have 36 cookies.The equation to find out how many cookies are in each bag is 4*c=36. Why is this wrong?

*asked on April 25, 2016* -
## Art

what value is most likely encouraged when citizens look at the rising eagle on the unit state dollar bill? Wisdom Patriotism Endurance Creativity I think either wisdom or patriotism

*asked on April 7, 2016* -
## Chemistry

what volume of 1.00M ca(oh)2 is needed to neutralize 250.0mL of 0.100M HCL?

*asked on April 6, 2016* -
## chemistry

Experimentally the ionization energy of hydrogen is 1312.2 kJ / mol. What would be the wavelength (nm) of a photon with enough energy to ionize one atom of hydrogen? They give the equation E=hcR but those are all known constant values and none include mols

*asked on November 18, 2014* -
## chemistry

Please identify the acid and the base in this equation. HClO + NaOH = NaClO + H2O Thank you!

*asked on September 15, 2014* -
## Chemistry: Please Help!!

39. Explain why sweating cools you down in terms of molecular kinetic energy. 40. You take a pizza out of the oven and let it cool briefly. When you bite into it, the crust is not too hot but the cheese burns your mouth. Explain why this happens in terms

*asked on September 15, 2014* -
## social studies

where did major general William Rufus Shafter stay while he controlled the war? PLEASE HELP!!!!!!

*asked on April 7, 2014* -
## Physics, help!

A heat engine absorbs 126 kcal of heat and exhausts 77 kcal of heat in each cycle. Calculate the efficiency (as a percentage) An ideal gas heat engine operates in a Carnot Cycle between temperatures of 266 and 115°C. It absorbs 4250 cal per cycle at

*asked on January 18, 2013* -
## math

write a number and a fraction greater than 1 that name the part filled

*asked on December 5, 2012* -
## Physics

A rectangular aluminum plate has an area of 0.41 m2 at 23°C. If it is heated until its area has increased by 4.4 10-6 m2, what is the final temperature of the plate? °C

*asked on July 31, 2012* -
## Physics

An ice cube of volume 17.7 cm3 is initially at a temperature of -19.3°C. How much heat is required to convert this ice cube into steam?

*asked on July 31, 2012* -
## trig

Solve the equation on the interval [0,360) cos^2t+2cos(t)+1=0

*asked on July 12, 2012* -
## Physics

A car of mass 1,700 kg is initially traveling at a speed of 25 m/s. The driver then accelerates to a speed of 35 m/s over a distance of 500 m. Calculate the change in the kinetic energy of the car.

*asked on July 11, 2012* -
## social studies

6. Stabilization policies can best be described as policies that: A. attempt to eliminate recession and/or inflation in the economy. B. use changes in government spending to promote an equitable income distribution. C. use changes in the money supply to

*asked on January 17, 2011* -
## Math

what is 12 to the 2nd power?

*asked on December 6, 2009* -
## Civics

Who is assigned to take care of diplomacy?

*asked on February 21, 2009* -
## Physics

a 100 g iron bar at 100 C is placed in 200 g of water at 20 C. If specific heat of iron is 0.11 cal/G*c to what final temperature will the iron bar cool?

*asked on January 11, 2009* -
## Physics

a 100 g iron bar at 100 C is placed in 200 g of water at 20 C. If specific heat of iron is 0.11 cal/G*c to what final temperature will the iron bar cool?

*asked on January 11, 2009* -
## 5th grade math

Need help... equivalent decimal for 214% =.214right? percentage 7 1/2% of 120 = 9% percent 15 is what percent of 75 = ?

*asked on December 5, 2008* -
## Geometry

Center & Radius of circle? (x+1)^2+(y+7)^2=36

*asked on January 18, 2020* -
## Math

f two lines are cut by a transversal in such a way that alternate interior angles are congruent, then the lines are parallel. Given: Use the lines and angles numbering system shown on page 156 in your online textbook. Alternate interior angles ∠3 and

*asked on June 27, 2019* -
## OK History

Please help ASAP!!! ***Describe how oklahoma's economy has become more diversified in the last 20 years. Cite specific non traditional industries that have come to the state. How has diversification helped the state?**** I was thinking that it would be

*asked on April 28, 2019* -
## history

which region of mexico is the best for growing crops

*asked on January 9, 2019* -
## Math

-2.2(1.1-6.6)

*asked on October 10, 2018* -
## LA

what are two ways tock and humbug are differentin act 2 of the phantom tollbooth

*asked on May 20, 2017* -
## algebra

graph y=/x/-2

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

7x + 5 8x + 9 find the value of x so that both the sum of the equations equal 180 when added together.

*asked on May 25, 2016* -
## Algebra

I lined up all of my pet snakes. The two pythons are 6 feet each. I also have three corn snakes that are all the same length. Altogether, my snakes total 21 feet. A. How long is one of the corn snakes? B.Write an equation that models this situation. Thank

*asked on April 26, 2016* -
## math

write an algebraic or numeric expression for the following:Take away 30 from j

*asked on April 25, 2016* -
## Chemistry

Radium-223 has a half-life of 11.4 days. Approximately how long would it take for the activity of a sample of 223Ra to decrease to 2.00 % of its initial value?

*asked on April 7, 2016* -
## Chemistry

What volume of 1.00M ca(oh)2 is needed to neutralize 250.0mL of 0.100M HCL?

*asked on April 5, 2016* -
## Physics

you strike a huge spring at a speed of 30m/s while strapped in a steel cage. When you hit the spring with combined mass of 320kg it is compressed 9.0m. A) What is the spring constant of the spring? B) How long are you in contact with the spring before it

*asked on February 22, 2016* -
## Physics

So you chose to use a solid sphere and you give it a speed of 5.9m/s on a flat horizontal surface which is the speed it has when it reaches a 22degree incline. A) How far along the incline will it go?

*asked on February 22, 2016* -
## science

convert your answer from 3 to meters per second.

*asked on February 11, 2016* -
## Language Arts

Choose the meaning that best matches the word in capitals: The president of the large company felt as if he had reached the PINNACLE of his career. A. lowest point B. pointed or towering formation C. highest point of achievement** D. rise toward success or

*asked on January 15, 2016* -
## math

The property taxes on a business office were $3000. What was the tax rate if the business office was valued at $200,000?

*asked on December 11, 2015* -
## Math

First year students at a particular college must take one English class, one class in mathematics, a first year seminar, and and elective. There are 2 English class to choose from, 3 mathematicss classes, 5 electives, and everyone takes the same first year

*asked on October 22, 2015* -
## AP Chemistry

An ore contains Fe3O4 and no other iron. The iron in a 39.3-gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 10.6 g. What was the mass of Fe3O4 in the sample of ore? Answer in units of

*asked on September 7, 2015* -
## Math 7

A photo studio offers different sized prints of the same subject. The original print measures 8 inches by 10 inches. A printer enlarges the orginal the orginal by a scale factor of 1.5, and then enlarges the second image by a scale factor of 3. What are

*asked on May 25, 2015* -
## History

I am having a hard time with this question and where to look for the answer. How might the cultures of Latin America be different if the spanish and portugese never arrived? Also what kind of culture do you think would dominate today?thanks

*asked on April 15, 2015* -
## Science

which of these statements provides evidence to the fact that oceans influence climate by transporting water from one place to another? A)warm ocean water off the east coast of Florida affects the climate of Europe. B)warm ocean water off the east coast of

*asked on March 28, 2015* -
## Science

Salinity of the ocean A)is generally very low B)changes with climate C)decreases with increase in temperature D)increases where a river meets the ocean I think its A but I'm not sure I just want to make sure.

*asked on March 27, 2015* -
## English

Hello, can you check with me to see if this answer is correct to this question. What does scrooge mean by these lines in a Christmas carol Act two scene four? Spirit this is a fearful place, in leaving it, I shall not leave its, lesson, Trust me let us go.

*asked on March 27, 2015* -
## Statistics

A student guesses blindly on a 20-question multiple choice test. If each question has 4 answer choices (only one of which is correct), what is the probability that the student will answer exactly 10 questions correctly?

*asked on February 20, 2015* -
## physics

A horizontal force of 150 N is used to push a 45.0-kg packing crate a distance of 5.75 m on a rough horizontal surface. If the crate moves at constant speed, find each of the following. (a) the work done by the 150-N force (b) the coefficient of kinetic

*asked on February 17, 2015* -
## algebra

A school has a classroom with a length eight feet less than twice the width. If a group of parents purchased 400 square feet of carpet for the room, what is the approximate length of the room? L=2W-8 L*W=400 (2W-8)W=400 2w^2-8w=400

*asked on February 10, 2015* -
## College Algebra

Allison drove home at 65 mph, but her brother Austin, who left at the same time, could drive at only 41 mph. When Allison arrived, Austin still had 144 miles to go. How far did Allison drive?

*asked on January 29, 2015* -
## Math

A true crab has 4 fewer than twice the number of legs that a hermit crab has. The hermit crab has 6 legs. How many legs does the true crab have? I put for the equation 4c =6 *2 I am confused

*asked on January 14, 2015* -
## Math

An annual pass covering entrance fees to more than 2000 national parks cost $80. If the total income from the annual passes is $12,800 in one month. Write the equation and solve it. For my equation I put 12800p=80

*asked on January 14, 2015* -
## Math

1400= 2/5x X= 7000 I took 1400 times 5

*asked on January 13, 2015* -
## Math

Which expression represents the difference of (3y+2)-(y-1)? I put 2y+ 3 for my answer.

*asked on January 12, 2015* -
## Chemistry

find the mass in grams of 1.40x10^23 molecules of n2

*asked on January 11, 2015* -
## Chemistry

What is the mass of 1.00 mol of sodium hydrogen carbonate?

*asked on January 10, 2015* -
## Chemistry

What is the percent by mass of hydrogen in aspirin C2H8O4?

*asked on January 10, 2015* -
## chemistry

I just need a definitive answer because I've searched everywhere and it's made me second guess my original answer. How many valence electrons does copper have? I thought it was one but now I'm unsure. I know it's electron configuration is [Ar]4s1 3d10, so

*asked on November 24, 2014* -
## History

What are some aspects of the modern American political party system that began during the Jackson era? A.beginnings of political action committees and fundraising B.widespread campaigns for the popular vote, including fliers, slogans, and songs C.of

*asked on November 10, 2014* -
## physics

A circular curve of highway is designed for traffic moving at 93 km/h. Assume the traffic consists of cars without negative lift. (a) If the radius of the curve is 110 m, what is the correct angle of banking of the road? (b) If the curve were not banked,

*asked on October 7, 2014* -
## religion

who do members of the Jesuit Volunteer Corps work for?I need help,been stuck on this question for,like,15 minutes,I've been searching the internet for 20 minutes.

*asked on September 28, 2014* -
## Chem

41. How much heat energy must you use to raise the temperature of 100 grams of water from 60C to 70C. Show your calculations. 42. You have a pot of 100C liquid water. If you add heat to the water, will the temperature start to raise at once? why or why

*asked on September 15, 2014* -
## Chemistry: Please Help!!

37. Lake Michigan is a very large, very deep body of water, located in a region of the United States that gets quite cold in winter. On the coldest day of last year, what was the temperature at the bottom of the lake. Explain your answer in terms of

*asked on September 15, 2014* -
## Chemistry

B. Could non-polar nitrogen molecules and polar water molecules form bonds with one another? if so, what kind? C. Given your answer to B above, do you think that there is a great deal of N2 dissolved in the oceans, a small amount, or none at all?

*asked on September 15, 2014* -
## math

3/4 of a gallon is 6/7 of the amount originally in the container. how much was in container originally

*asked on April 20, 2014* -
## Math

In triangle ABC, m

*asked on March 27, 2014* -
## Math

Write a rule in function notation to describe transformation that is a reflection across the x-axis. A. Ry-x(X,Y) B. Rx-0(X,Y) C. Rx-y(X,Y) D. Ry-0(X,Y)

*asked on March 27, 2014* -
## Algebra

6/z-3=8/5 help please.

*asked on March 21, 2014* -
## Math

Line LM is the mid-segment of rectangle ABCD. AB=x+8, LM = 4x+3, and DC=243. What is the value of x?

*asked on March 11, 2014* -
## Math

Line LM is the mid-segment of rectangle ABCD. AB=72 and DC=104. What is LM? A.176 b. 88 c.98 d.32

*asked on March 11, 2014* -
## Geometry

What is an equation in point-slope form for the line perpendicular to y=2x+13 that contains (8,-4)?

*asked on March 9, 2014* -
## Social Studies 10

"Was the conflict over the Red River Settlement inevitable? Provide reasons for your answer."

*asked on March 6, 2014* -
## Math

Can you please check my answers? Thank you! 18 out of 25 people love chocolate what percentage of people do not love chocolate? I got 28% 15% of the Chemistry class did not pass their chapter 7 test if the class has 38 students how many students did not

*asked on November 4, 2013*