# katrina

Most popular questions and responses by katrina-
## I NEED HELP WITH THIS. PLZ

Lesson 2:3-D Views Unit 2: Measurement Multiple Choice For questions 1-3, use the following model. 1. How many cubes are in the base of the model? (1 point) A. 3 B. 4 C. 7 D. 2 2.How many cubes would be shown in the right view of the model? (1 point) A. 3

*asked on February 9, 2016* -
## Calc

If a rock is thrown upward on the planet Mars with a velocity of 17 m/s, its height (in meters) after t seconds is given by H = 17t − 1.86t^2. (a) Find the velocity of the rock after one second. (b) Find the velocity of the rock when t = a. (c) When will

*asked on October 17, 2011* -
## Art

The cinematographer works with what other professional to plan how each scene will be filmed and lit? A) Production Designer*** B) Director C) Graphic Artist D) Screen Writer Thank you!!! :)

*asked on February 3, 2019* -
## math

Part A: Max rented a motorbike at $465 for 5 days. If he rents the same motorbike for a week, he has to pay a total rent of $625. Write an equation in the standard form to represent the total rent (y) that Max has to pay for renting the motorbike for x

*asked on December 12, 2016* -
## (Math) PLZ CHECK ANSWERS

1. Which number is a solution of the inequality? 10.68 A)-5 B)-6 C)6 D)7*** 3. Which number is a solution of the inequality? 6>z(10-z) A)0 B)1 C)2 D)3*** 4. What are all the subsets of the set? {-1,9} A) 0, {-1}, {9}*** B) {-1}, {9}, {-1, 9} C) 0, {-1},

*asked on October 28, 2016* -
## Calculus (please help I really need to check this)

Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter.

*asked on April 11, 2011* -
## Calculus

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of

*asked on April 10, 2011* -
## Physics

Sue and Jenny kick a soccer ball at exactly the same time. Sue’s foot exerts a force of 49.9 N to the north. Jenny’s foot exerts a force of 119.7 N to the east. a) What is the magnitude of the resultant force on the ball? Answer in units of N b) What

*asked on November 2, 2013* -
## precalculus

Twenty percent of a radioactive substance decays in ten years. By what percent does the substance decay each year?

*asked on March 3, 2011* -
## math

Geoff planted dahlias in his garden. Dahlias have bullbs that dvide and reproduce underground. in the first year, geoff's garden produced 4 bulbs. in the second year it produced 8 bulbs and in the third year it produced 16 bulbs. if this pattern continues

*asked on March 12, 2018* -
## algebra

An inequality is shown below: −np − 3 ≥ 7(c − 4) Which of the following solves for n? n ≤ − the quantity 7 times c minus 31 all over p n ≤ − the quantity 7 times c minus 25 all over p---my choice n ≥ − the quantity 7 times c minus 31

*asked on January 12, 2017* -
## U.S History

Case Study: General Andrew Jackson: Andrew Jackson's military career spanned several wars including the American Revolution, the Creek War, the War of 1812, and the First Seminole War. After the Creek War, Jackson and the Creek Indians signed the Treaty of

*asked on December 5, 2016* -
## Math

The image below shows two dilated figures with lines KL and K’L’ drawn. If the smaller figure was dilated using a scale factor of 2, what relationship do lines KL and K’L’ have?

*asked on January 2, 2017* -
## Bio

A biologist measured the amount of DNA in several single diploid cells taken from a culture. He knew that these cells could divide mitotically, but not meiotically. His data is shown below: Cell Number and DNA content in micrograms: Cell 1 (11.1

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

What describes the current model of the atom? A)That electrons and protons move randomly around a nucleus. B)Electrons travel as waves in the electron cloud that surrounds the nucleus. C)Electrons orbit the nucleus like planets orbit the sun. D)Protons

*asked on January 9, 2017* -
## Social Studies

Refer back to the text about the benefits of agriculture for ancient Egyptians. List three benefits. Write advertising slogans to promote agriculture to ancient Egyptians. Use your slogans to make a presentation about one or more benefits. Brainstorm one

*asked on November 14, 2016* -
## U.s History

1.Which statement best describes an effect of William Penn's actions on colonial America? A)Cash-crop agriculture became more profitable in the Southern colonies. B)Many immigrants came to the Middle colonies seeking religious freedom.*** C)Several

*asked on December 5, 2016* -
## food and Nutrition

Which protein is usually given the 'superior' names?

*asked on March 30, 2017* -
## precalculas

The doubling period of a baterial population is 20 minutes. At time t=100 minutes, the baterial population was 80000. What was the initial population at time t=0? Find the size of the baterial population after 4 hours.

*asked on March 1, 2011* -
## PHYSICS helppppp

A 0.2 kilogram baseball is thrown vertically downwards towards to the same horizontal floor. The baseball possesses an initial velocity of 30 meters per second. The height is 10.00m. (A) Calculate the POTENTIAL GRAVITATIONAL ENERGY and KINETIC ENERGY of

*asked on February 19, 2007* -
## History-Armenian Genocide

why is the Armenian genocide significant? can the international community prevent future genocide from happening? This site gives some excellent information. http://www.armenian-genocide.org/genocidefaq.html To consider the second part of the question, you

*asked on October 14, 2006* -
## Music

1. How is the survival of indigenous music and culture related to the challenges of modernization and environmental degradation?

*asked on March 12, 2017* -
## science

1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation?

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

What is the force exerted by a catcher's glove on a 0.15-kg baseball moving at 35 m/s that is stopped in 0.02 s?

*asked on November 11, 2013* -
## U.S History

Which of the following offers the best definition of the phrase "headright system"? A)Settlers were given land and, in return, were expected to farm and build on it.*** B)Settlers were given money if they agreed to sell a portion of their crops to Britain.

*asked on December 5, 2016* -
## U.S History

1.Use the passage to answer the following question: So through the night rode Paul Revere; And so through the night went his cry of alarm To every Middlesex village and farm, A cry of defiance, and not of fear, A voice in the darkness, a knock at the door,

*asked on December 5, 2016* -
## ESL-grammar

can anyone plz tell me what's the differences between past perfect tense and past perfect continuous tense?and tell me few examples of each one? Thank you for using the Jiskha Homework Help Forum. The past perfect tense is to show that something "had

*asked on September 13, 2006* -
## history

Which of the following best explains why trade among the colonies flourished? A)The different regions specialized in different crops. B)The colonies had developed large fleets of trading ships.** C)Existing trade routes were well-maintained by Native

*asked on December 5, 2016* -
## science

I'm stuck on the following questions 1)The geocentric model of the universe states that the Earth is the center of the universe. This is an example of a A)scientific conclusion B)pseudoscience C)scientific law*** D)Scientific method Through process of

*asked on November 30, 2016* -
## U.S History

What did the Alien and Sedition Acts represent? A)Thomas Jefferson's concern with national defense B)James Madison's concern with personal freedom C)The importance of immigration to the Democratic-Republicans*** D)The importance of national security to the

*asked on December 6, 2016* -
## physics

a stone is dropped vertically into a lake which one of the following statements best describes the motion of the stone at the instant it enters the water?a)Its velocity and acceleration are both downwards b)It has an upwards velocity and a downward

*asked on July 8, 2016* -
## Chemistry

A 13.0-g sample of ice at -13.0°C is mixed with 112.0 g of water at 80.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g · °C, respectively, and

*asked on February 13, 2011* -
## answer check science

1. Which type of metal did Rutherford shoot alpha particles into? A)Copper B)Zinc C)Gold D)Platinum 2.When Thomson held a positively charged plate near the cathode ray, the beam bent toward the plate. What conclusion can be drawn from this observation?

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

Find an angle between o and 2pi that is coterminal with the given angle -8pi/3: 71pi/2: 11pi/7:

*asked on May 4, 2011* -
## Math

A hat contains 20 names, 9 of which are females. If 8 names are randomly drawn from the hat, what is the probability that at least 6 male names are drawn??????

*asked on June 1, 2010* -
## 6th grade history

how did athens become rich?

*asked on March 29, 2012* -
## COMBINATION!!MATH!!!hurryyy!!!

Cards are drawn at random from a 52-card deck. Find the number of different 5-card poker hands possible consisting of 3 aces and 2 kings? i don't knw how to do this kind of problems..can anyone teach me??? Forget about the fact that there are 52 cards in a

*asked on January 5, 2007* -
## Geometry

Show that triangle ABC is a right triangle. point A: (-7,-2) point B: (-3,-3) point C: (-4,-7) I really don't know how to do this, please help.

*asked on December 14, 2017* -
## Calculus

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of

*asked on April 10, 2011* -
## precalculas

Let f(x) be the function 8x^2-5x+2 . Then the quotient [f(5+h)-(5)]/h can be simplified to ah+b for: a= b=

*asked on February 25, 2011* -
## Math

Which shape doesn't have two pairs of parallel sides? A. Parallelogram B. Trapezoid C. Rhombus D. Square

*asked on April 30, 2019* -
## history

1.What event led to the U.S. purchase of the Louisiana Territory? A)The burning of a U.S. Navy ship in the First Barbary War B)The U.S. Supreme Court's decision in Marbury vs. Madison C)The successful Haitian slave revolt **D)Napoleon losing money in his

*asked on December 6, 2016* -
## math

In the formula s=ut+1/2at square.Make a the subject of formula (b)find the values ot t when s=42,u=2 and a=8.Am getting difficulties in that number.

*asked on June 20, 2007* -
## math

express this in binomial: 2 4ez (4e-z) the 2 is the square.. can anyone teach me how to do this??? I'm a little unsure what your question is asking for here. Ordinarily, a binomial is an expression with two variables and some positive power, e.g. (x+y)^2

*asked on September 20, 2006* -
## Chemistry

A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon?

*asked on June 21, 2011* -
## math

Plot the points A(2,2), B(4,6),C(10,-2)Notice that these points are vertices of a right triangle (the angle is 90 degrees). Find the area of the triangle ABC:

*asked on February 3, 2011* -
## music

A wind instrument, such as a bassoon, clarinet, flute, oboe, or saxophone, in which sound is produced by the vibration of reeds in or by the passing of air across the mouthpiece.

*asked on February 21, 2007* -
## Algebra Word Problem Help

A gardener has 40 feet of fencing with which to enclose a garden adjacent to a long existing wall. The gardener will use the wall for one side and the available fencing for the remaining three sides. If the sides perpendicular to the wall have length x

*asked on August 8, 2009* -
## English

Mother to Son by Langston Hughes Well, son, I'll tell you: Life for me ain't been no crystal stair. It's had tacks in it, And splinters, And boards torn up, And places with no carpet on the floor-- Bare. But all the time I'se been a-climbin' on. And

*asked on September 11, 2006* -
## Chemistry

3. A liquid hydrocarbon (Cx Hy) is found to be 16.37% H by mass. A 1.158-g vaporized sample of the hydrocarbon has a 358 mL volume at 71.0 C and 749 mmHg. what is the molecular formula for this hydrocarbon? 4. A 1.00 g Sample of C7H603 (s), us completely

*asked on June 21, 2011* -
## Science

1. What is the relationship between elevation and average surface temperature? 2. What is the generalized relationship between latitude and average surface temperature..(I think it's that the higher the latitude, the colder the surface temperature)? 3.

*asked on January 22, 2009* -
## physics

i don't understand the projectile motion...my teacher said...it's a motion of a body confined to a vertical plane, perpendicular to Earth's surface... I don't get it, can anyone explain to me clearly???? plzzzzz....THX!!!! If your teacher said that, she

*asked on November 29, 2006* -
## Math

Find the percent of increase or decrease. 1. The price of ratio genius for $40-$44

*asked on November 9, 2017* -
## English

I really need someone to check my answers and I don't want to get the answers wrong. Cross out any prepositional phrases. Underline the verb/verb phrase twice. 1.) John walked along the trail during the summer. Subject:John Verb:walked Phrase:along the

*asked on November 7, 2015* -
## math

dave delivered 52 newspapers in all.saturday and sunday.he delivered 8 more newspapers on sunday than on saturday.how many newspapers did dave deliver on sunday.

*asked on August 30, 2012* -
## Chemistry

A solution is prepared by mixing 0.0400 mol CH2Cl2 and 0.0700 mol of CH2Br2 at 25°C. Assuming the solution is ideal, calculate the composition of the vapor (in terms of mole fractions) at 25°C. At 25°C, the vapor pressures of pure CH2Cl2 and pure CH2Br2

*asked on February 20, 2011* -
## SENTENCE STRUCTURE

"The data indicate that 40 percent of the land that Israel plans to keep in any future deal with the Palestinians is private." Which kind of sentences is it?simple?complex?compound?complex compound? How can I define the part of speechs of each word in this

*asked on November 22, 2006* -
## PHYSICS

a 60 km/h wind is blowing in a direction 30 degrees north of east. a. what is the component of the velocity oriented to the east? b. what is the component of the velocity oriented to the north? The component east is 60cos30. For both a and b, draw a

*asked on November 11, 2006* -
## science double check answers

1. What is the alignment of the Earth, moon, and sun during a lunar eclipse? A)Earth, sun, moon B)Earth, moon, sun C)Sun, Earth, moon** D)Sun, moon, Earth I know that for a lunar eclipse the earth is in the middle, so i just wanted to double check 2.A

*asked on December 1, 2016* -
## Science

1.When the effects of the moon and sun work together, this is what kind of tide? A)Neap tide B)Fall tide C)Spring tide** D)New moon tide

*asked on December 1, 2016* -
## science

1. What is the alignment of the Earth, moon, and sun during a lunar eclipse? A)Earth, sun, moon B)Earth, moon, sun C)Sun, Earth, moon** D)Sun, moon, Earth I know that for a lunar eclipse the earth is in the middle, so i just wanted to double check 2.A

*asked on December 1, 2016* -
## Calculus (pleas help I really need help with this)

Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter.

*asked on April 10, 2011* -
## Algebra

An area, A, consisting of the sum of two squares is 1000. The side of one square is 10 less than 2/3 of the side of the other square. What are the sides of the squares?

*asked on June 30, 2009* -
## Math

Find the cost function if the marginal cost function is dC/dx=2x-15 and fixed costs are $75.

*asked on August 26, 2011* -
## physics, please help check

A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree

*asked on February 21, 2007* -
## Physics

what is the general relationship between the density of solids and the density of liquids? Are you talking about the density of substance X in the solid state vs the density of the same substance in the liquid state. GENERALLY, solids have a higher density

*asked on October 1, 2006* -
## math

What is the force exerted by a catcher's glove on a 0.15-kg baseball moving at 35 m/s that is stopped in 0.02 s?

*asked on November 11, 2013* -
## precalculus

Write and simplify the difference quotient for the function b(t)= 3t^2-4t+5 over the interval [7,7+h]

*asked on April 13, 2011* -
## math

a) how many tens are in 1000? b) how many hundreds are in 6000? c) how many thousands are in 2 000 000?

*asked on November 11, 2010* -
## math

If one clerk can process 75 pieces of mail in 2 and 1/2 hours, how long will it take eight clerks to process 1620 pieces of mail if all of them work at this same rate?

*asked on April 28, 2010* -
## factoring

if the length of one side of a square is 1/2h, find the representation of the area. If a side of a square is s, the area is s squared. area of square is (length of side)^2. Substitute 1/2h for (length of side) and go from there.

*asked on November 8, 2006* -
## physics

i'm confused with this problem..can anyone explain it to me? what should a graph of mass versus volume resemble if we were to plot the respective mass and volume values for each body as points in a Cartesian coordinate field and connect each point with a

*asked on October 2, 2006* -
## biology

Both of the following processes represent what? A. A baker using yeast to make dough rise. B. Inserting human insulin genes into bacteria to make insulin for diabetics. biotechnology transgenic organisms genetic engineering all of the above

*asked on September 14, 2016* -
## math

The equation y = 400(1.03)x is an example of

*asked on March 1, 2012* -
## Calculus (please help!!!!)

Consider a window the shape of which is a rectangle of height h surmounted a triangle having a height T that is 1.3 times the width w of the rectangle. If the cross-sectional area is A, determine the dimensions of the window which minimize the perimeter.

*asked on April 10, 2011* -
## psychology

you are conducting research on sex differencesin emails .Your hypothesis is that the men use more declarative statements and women use more questions.what might be the advantages of using the archival method

*asked on February 4, 2011* -
## popular american culture

how would i rewrite a fragment sentence for example THE ENDEAVOR TO INFLUENCE A SPECIFIC AUDIENCE TO BUY A GOODS OR SERVICE OR A SPECIFIC BELIEF SHOW ME HOW TO REWRITE IT PLEASE

*asked on February 3, 2010* -
## Math

I just do not understandthe concept of this can some one make it more simple for me to understand? Remove parenthesis and simpilfy its not just this one its the whole understanding thing. 8p+5q-9(8p-8q+9r) I got -72+67q-81r

*asked on October 29, 2009* -
## Math Help Please

Which of the following expressions is equal to log (x sqrt-y)/z^5 A. log x + log (1/2) + log y– log 5 – log z B. log [x + (1/2)y – 5z] C. log x + (1/2)log y – 5 log z d. [(1/2) log x log y]/(5 log z)

*asked on August 3, 2009* -
## Algebra

Express as a single logarithm and simplify: 2 log 3 + log (3x) – log x

*asked on August 2, 2009* -
## Chemistry

How would you approach a question like There are 6.02x 10 to the power of 23 atoms in one mol of atoms, how many atoms are there in 5.5 mol of atoms?

*asked on February 5, 2008* -
## Chemistry

Hello Jiskha, I'm hoping you are able to help me with my homework. Its on General Chemistry. Question One - When the solid NH4NO3 is dissolved in water at 25 C, the temperature of the solution decreases. What is true about the signs of enthalpy (H) and (S)

*asked on May 9, 2007* -
## physics

a horizontal wire is stretched between two vertical poles. when a 12.0-N weight is suspended at its center, the wire sags until the angle between its halves is 110 degrees. what are the forces exerted by each half of the wire in supporting the weight? i

*asked on November 12, 2006* -
## physics

the cables of a suspension bridge as well as the elements of many man-made structures are designed to behave elastically. whey it is absolutely necessary that such elements function elastically? When loaded past their elastic limit, and the loads are

*asked on October 28, 2006* -
## physics

The system in the Figure is in equilibrium. A mass M1 = 226.0 kg hangs from the end of a uniform strut which is held at an angle è = 41.0° with respect to the horizontal. The cable supporting the strut is at angle á = 27.4° with respect to the

*asked on October 14, 2014* -
## chemistry

Week 5, Day 4, respond to the problem statement assigned to you for this week. At a prominent state hospital, a 45-year-old woman is receiving a ‘combined modality' treatment for the initial stage of breast cancer. State the two aspects included in this

*asked on January 22, 2012* -
## algebra

Rewrite with positive exponents. Assume that even roots are of nonnegative quantities and that all denominators are nonzero. (2x^2y-^1)^-6

*asked on December 20, 2011* -
## physics

A six kilogram object undergoes an acceleration of 2.0 meters per second squared. Part a. What is magnitude of the net force acting on the object? Part B. If the same force is applied to a 4 kilogram object what acceleration is produced?

*asked on October 19, 2011* -
## Calculus please help!!

*asked on April 10, 2011* -
## Calculus

In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of A present is a grams, and the quantity of B present is b grams. Assume a is less than b. At time t seconds after the start of

*asked on April 10, 2011* -
## Calculus (please help!!!)

*asked on April 10, 2011* -
## precalculus

For the Function, y= x(x-4)(x+8) Y-intercept is: X-intercept is:

*asked on April 4, 2011* -
## precalculas

the amount of bacteria in a petri dish increased by a percent change of 12% each hour over a period of 15 hours. a. find the growth factor for 1 hour? b. by what total percent did the bacteria change during this 15- hour time period.? c. how long will it

*asked on March 1, 2011* -
## Algebra

Solve the system by either elimation or substitution: x+8y=18 y=-2/7x-18/7

*asked on August 2, 2010* -
## Geography

What does the federal government impose on a high horsepwer that uses more fuel vehicles?

*asked on December 11, 2009* -
## Geography

What government imposed barriers stop or hinder the export (out of the U.S) of automobiles?

*asked on December 11, 2009* -
## science

second grader. Please help me with examples of things I can investigate using the scientific method for my homework project. thank you.

*asked on November 6, 2008* -
## photosynthesis and cellular respiration

Explain in what way ATP and ATD can be likened to a rechargeable battery

*asked on September 11, 2008* -
## physics HELP!!

3. A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree

*asked on February 20, 2007* -
## PHYSICS helppppp

a horizontal wire is stretched between two vertical poles. when a 12.0-N weight is suspended at its center, the wire sags until the angle between its halves is 110 degrees. what are the forces exerted by each half of the wire in supporting the weight? i

*asked on November 12, 2006*

## Pages

**1**- 2