# Leah

Most popular questions and responses by Leah-
## Math- integers

Explain the meaning on 0 : a decrease of 250 attendees

*asked on January 4, 2017* -
## social studies

1)An interest rate is a special type of? a. loan b. price c. bank d. service 2) How does a compound interest rate differ from a simple interest rate? a. Compound interest rates pay more interest over time b. Compound interest rates are calculated only once

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

The pressure, P (in lbs/ft2), in a pipe varies over time. Three times an hour, the pressure oscillates from a low of 88 to a high of 254 and then back to a low of 88. The pressure at t=0 is 88. Find a possible cosine formula for P=f(t), where t is time in

*asked on November 2, 2014* -
## English Lit

I have two questions about these Emily Dickinson's "Wild Night" 1.Which best describes the rhyme in the second stanza--internal rhyme,slant rhyme,feminine rhyme,descending rhyme or no rhyme Would it be slant rhyme? 2.Which is the following sound device

*asked on October 7, 2011* -
## Physics

The archerfish hunts by dislodging an unsuspecting insect from its resting place with a stream of water expelled from the fish's mouth. Suppose the archerfish squirts water with a speed of 2.45 m/s at an angle of 53.0 degrees above the horizontal, and aims

*asked on September 15, 2009* -
## math

The maturity value of a $28,000, 6%, 60-day interest-bearing note on August 6 is

*asked on April 8, 2017* -
## chemistry

The complete combustion of propane, C3H8(g), is represented by the equation: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(l) ΔH° = -2220 kJ How much heat is evolved in the complete combustion of 20.0 L C3H8(g) at STP?

*asked on May 14, 2014* -
## math

what is the missing value to the nearest hundredth? tan [] = 12 I really need some help. I don't understand this :(

*asked on May 24, 2016* -
## math

An ostrich farmer wants to enclose a rectangular area and then divide it into 4 pens with fencing parallel to one side of the rectangle. There are 720 feet of fencing available to complete the job. What is the largest possible total area of the 4 pens?

*asked on October 28, 2014* -
## Math

John is using a pulley to lift the sail on his sailboat. The sail weighs 150 N, and he must lift it 4.0 m. a. How much work must be done on the sail? b. If the pulley is 50% efficient, how much work must John do on the rope to lift the sail?

*asked on November 3, 2012* -
## Math

How would you solve this word problem in one variable inequality form? One cell phone company offers a plan that costs $29.99 and includes unlimited night and weekend minutes. Another company offers a plan that costs $19.99 and charges 35 cents per minute

*asked on September 25, 2013* -
## Calculus

Use the position function s(t)=-4.9t^2+ 150, which gives the height (in meters) of an object that has fallen from 150 meters. Teh velocity at time t=a seconds is given by: lim as t approaches a s(a)-s(t) divided by a-t a) find the velocity of the object

*asked on August 31, 2007* -
## physics!

The mass of an automobile is 1160kg, and the distance between its front and rear axles is 2.54m. The center of gravity of the car is between the front and rear tires, and the horizontal distance between the center of gravity and the front axle is 1.02m.

*asked on January 5, 2008* -
## Physics

A baseball is hit at ground level. The ball is observed to reach its maximum height above ground level 3.0 s after being hit. And 2.5 s after reaching this maximum height, the ball is observed to barely clear a fence that is 97.5 m from where it was hit.

*asked on May 13, 2012* -
## English

5. Sarita's party takes place at night and all the villagers are gathered there. How do these details help make the party a good setting for the stranger to accomplish his goal? (1 point) * He can arrive and escape without people seeing him. * It will take

*asked on March 18, 2010* -
## Math

For this problem, a person standing on the edge of a cliff throws a rock directly upward. it is observed that 2 secs later the rock is at its maximum height (in feet) and that 5 secs after that (meaning 7 seconds after being thrown) the rock hits the

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

A 75 kg pilot flies a plane in a vertical loop. At the top of the loop, when the plane is completely upside-down for an instant, the pilot hangs freely in the seat and does not push against the seat belt or seat. The airspeed indicator reads 120 m/s. What

*asked on November 20, 2014* -
## Chemistry

If you want to lose 5 pounds of body fat which is 15percent water, how many kilocalories do you need to expend?

*asked on September 9, 2018* -
## health

Visiting your doctor for regular check-ups is an example of which step you might take to meet take to meet your health goals? A. gain awareness. (B). gain knowledge. C. build health skill. D. set goals.

*asked on September 10, 2014* -
## English

Identify the term that best describes the words/phrases in parentheses. 1. The teacher asked her pupils to (stay) put during the screening of the documentary. linking verb action verb 2. The committee judged the logo (the most appropriate symbol) for the

*asked on January 23, 2013* -
## Math

12a-3b2. When a=9 b=4. Please explain steps

*asked on November 2, 2016* -
## Social Studies

1.How did the Portuguese use geographic factors to help them control the spice trade? * a.They conquered inland kingdoms, which they turned into a trading empire. b.They used force and diplomacy to set up coastal trading posts and seize key ports around

*asked on January 4, 2017* -
## chemistry

a current is passed through 500 mL of a solution of CaI2. the following electrode reactions occur: anode: 2I- ---> I2 + 2e- cathode: 2H2O + 2e- ---> H2 + 2OH- after some time, analysis of the solution shows that 35.7 mmol of I2 has been formed. a) how many

*asked on June 18, 2012* -
## math

Sally and Marta had the same number of postcards. After Sally sold 18 of her postcards, Marta had 4 times as many postcards as Sally. How many postcards did each girl have to begin with?

*asked on October 1, 2013* -
## Stats

The data below were gathered on a random sample of 5 basking sharks, swimming through the water and filter-feeding, i.e. letting the water bring food into their mouths. Body Length (meters) Mean Speed (meters/seconds) 4 0.89 4.5 0.83 4 0.76 6.5 0.94 5.5

*asked on September 30, 2016* -
## physics

An athlete leaves one end of a pool of length L at t = 0 and arrives at the other end at time t1. She swims back and arrives at the starting position at time t2. If she is swimming initially in the positive x direction, determine her average velocities

*asked on January 22, 2015* -
## Math

If he divides his land into square fields that are 1/3 mile long and 1/3 mile wide how many fields will he have

*asked on September 19, 2018* -
## algebra

On the day a child was born, a lump sum P was deposited in a trust fund paying 6.5% interest compounded continuously. Use the balance A of the fund on the child's 29th birthday to find P. (Round your answer to the nearest cent.) A = $5,000,000 P = $1

*asked on November 1, 2011* -
## stats

2. The modern Olympic Games are a modified revival of the Greek Olympian Games that came to be largely through the efforts of the French sportsman and educator Baron Pierre de Coubertin. The Games are an international athletic competition that has been

*asked on September 30, 2016* -
## English 10 A

Has anyone took the "alone, The nobel prize , First Frost" quiz? if so please help thank you so much!! i will try to help in return.

*asked on October 22, 2015* -
## math

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean? A. The improvement was due to the fact that there were

*asked on April 16, 2015* -
## stats

4. One measure of form for a runner is stride rate, defined as the number of steps per second. A runner is considered to be efficient if the stride rate is close to optimum. The stride rate is related to speed; the greater the speed, the greater the stride

*asked on September 30, 2016* -
## Chemistry - Acids/Bases

What kinds of compounds are typically strong bases? (More than one may apply.) *hydroxides of group IIIA (13) metals *conjugate bases of strong acids *hydroxides of group IA (1) metals *hydroxides of transition metals *hydroxides of group IIA (2) metals

*asked on May 9, 2015* -
## Stats

Grey Kangaroos are large, social marsupials, indigenous to Australia. The Eastern Greys are a light grayish brown, while the Western Grey is a copper brown color. As part of a study of the development of these creatures, biologists have measured various

*asked on September 26, 2016* -
## simplex Method

Solve the linear programming problem by the simplex method. Maximize P = 5x + 4y subject to 3x + 5y < 78 4x + y < 36 x > 0, y > 0 x = y = P =

*asked on April 24, 2011* -
## Physics

A 31.9 N object is in free fall. What is the magnitude of the net force which acts on the object? Answer in units of N.

*asked on January 7, 2016* -
## Math

An Aircraft Flies Round A Triangular Course. The First Leg Is 200km On A Bearing Of 115km And The Second Leg Is 150km On A Bearing Of 250km. Draw A Diagram For This

*asked on March 9, 2017* -
## English(Poetry)

What is prose paraphrase, and how do you do it to a poem?

*asked on January 11, 2016* -
## Math

How can I show 1/3x+10=3/5x as or in a real world problem??

*asked on February 8, 2016* -
## Simplex Method

Solve the linear programming problem by the simplex method. Maximize P = 10x + 6y subject to x + y < 80 3x < 90 x > 0, y > 0 x = y = P =

*asked on April 24, 2011* -
## math

The volume V of a pyramid varies jointly as its height h and the area of its base B . Given that the volume of the pyramid is 60 cubic inches when the height is 5 inches and area of its base is 36 square inches, what is the area of the base if its volume

*asked on October 19, 2015* -
## algebra

If a rocket is launched with an initial velocity of 1600 feet per second when will the rocket be 14400 feet high?

*asked on February 7, 2012* -
## chemistry

An aspirin tablet weighing 0.475 g has been analyzed and contains 68.2 % ASA (180.16 g/mol) by mass. A student dissolved the tablet in hot NaOH and the cooled solution was diluted with DI water to the mark in a 250 mL volumetric flask. Exactly 3.00 mL of

*asked on January 26, 2009* -
## college chem

You are instructed to create 400. mL of a 0.40 M phosphate buffer with a pH of 6.9. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. (Enter all numerical answers to three significant figures.) H3PO4(s) + H2O(l)

*asked on June 23, 2014* -
## math

a marine biologist wants to know the vertical distance a dolphin traveled during a jump.with the surface f the water being zero , it started under water at -35 feet, jumped up and out of the water to 27 feet. and returned to the water at -18 feel. what is

*asked on November 4, 2018* -
## Chemistry

A solution contains a mixture of Cl- and Br- ions. Can both be positively identified? Briefly explain and write appropriate equations to support your answer.

*asked on March 23, 2011* -
## ST KYLINS

I have 9 digits. My ten millions digit is a 0 and is 8 less than my hundreds digit. My hundred millions digit is 1 less than my thousands digit, 8 more than my millions digit, twice my ten thousands digit, and 4 times my hundred thousand digit. My digits

*asked on December 15, 2016* -
## Chemistry

when 5.00 g of CaCl2 dissolves in 50.0g of water, what is the boiling point of the solution

*asked on April 17, 2011* -
## Geometry

Find the area of the rectangle with the given base and height. 11ft, 3 in I think answer is 33 ft squared but not sure if it isn't please tell me the correct answer and how you got it

*asked on September 15, 2019* -
## AP statistics

A group of students were asked to guess the width of the room in feet, measured to the nearest foot (1 meter = 3.28 feet, to 2 decimal places). Construct a back to back stemplot from these two datasets. How will you overcome the problem that different

*asked on August 30, 2016* -
## Physics

A book is moved once around the edge of a tabletop with dimensions 1.75m x 2.25m. If the book ends up at the initial position, what is its displacement? If it completes its motions in 23s, what is its average velocity? What is its average speed?

*asked on August 28, 2011* -
## physics

The charges of two identical aluminum speheres are -24uC and +4.0uC. The spheres are brought together so they simultaneously touch each other. They then separated and placed on the X-axis. What is the net force exerted b one sphere on another after

*asked on April 29, 2010* -
## please help me, physics

Five moles of a monatomic ideal gas expand adiabatically, and its temperature decreases from 410 to 200 K. (a) What is the work done by (or done to) the gas? Include the algebraic sign. J (b) What is the change in the internal energy of the gas? Include

*asked on December 10, 2010* -
## Algebra

Show all steps and Find the maximum revenue for the revenue function R(x)= 360x - 0.05x^2

*asked on November 10, 2013* -
## Math

Determine whether each verbal description represents a linear function or not. Correct me if I'm wrong on any of these!! 1. Jova walks quickly for 25 minutes then she rests for 5 minutes before continuing on for another 10 minutes. (NOT A LINEAR FUNCTION)

*asked on October 30, 2013* -
## Math

A sixth number will be added to the list. What must it be in order for the mean to be 12? (Use algebraic equation to help)

*asked on February 21, 2017* -
## Math

A projectile is shot upward from the earth with an initial velocity of 320 ft/sec. (a) What is the velocity after 5 secs.? ft/sec. (b) What is the acceleration after 3 secs.? ft/sec^2.

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

A hockey game is preparing for a group photo. The team has 1 goalie, 4 defense, and 7 forwards. The photographer wants two rows of six players. How many ways can the team arrange six players in the front row with at most 2 defense?

*asked on May 11, 2014* -
## chemistry

The pressure in an automobile tire is 1.85 atm at 27.0°C. What will be the pressure if the temperature increases to 38.0°C?

*asked on March 20, 2014* -
## Chemistry

Explain why the calculated value for the (1) enthalpy of combustion for propane using bond energies (bond breaking and bond formation)might not be in close agreement to the values calculated using (2) Hess Law and the values calculated using the (3)

*asked on November 1, 2010* -
## Social Studies

Why did Korea and Japan choose a policy of isolationism? * a.They were following Chinese policies toward foreigners. b.They thought that foreign goods were of inferior quality. c.They felt that foreigners threatened their independence. d.They were occupied

*asked on January 4, 2017* -
## Math

If a ball is thrown vertically upward from the roof of 48 foot building with a velocity of 80 ft/sec, its height after t seconds is s(t) = 48+80t-16t^2 What is the velocity of the ball when it hits the ground?

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

On a random day in the spring 88% of the students are present at school.If there are 528 students presents how many total students are enrolled?

*asked on October 26, 2016* -
## Math

Tracy has one can of iced tea mix one scoop of the mix makes two servings of iced tea the scoop holds 1/12 of a can how many servings of ice tea can Tracy make

*asked on May 30, 2019* -
## Geometry

Help please!!!!

*asked on September 18, 2019* -
## Physics

A constant torque of 27.2 N · m is applied to a grindstone for which the moment of inertia is 0.158 kg · m2. Find the angular speed after the grindstone has made 18 rev. Assume the grindstone starts from rest. Answer in units of rad/s

*asked on November 11, 2011* -
## simplex Method

A company manufactures two products, A and B, on two machines, I and II. It has been determined that the company will realize a profit of $3/unit of product A and a profit of $4/unit of product B. To manufacture 1 unit of product A requires 6 min on

*asked on April 24, 2011* -
## Simplex Method

Solve the linear programming problem by the simplex method. Maximize P = 27x + 27y + 36z subject to x + y + 3z < 15 4x + 4y + 3z < 65 x > 0, y > 0, z > 0 x + y = z = P =

*asked on April 24, 2011* -
## University Physics

A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 28degrees above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.40 and 0.30, respectively.

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

What is the final price of a textbook that costs $107.20 with an added tax rate of 6%?

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

A 5.0g silver spoon at 20.0C is placed in a cup of coffee at 90.0C. How much heat does the spoon absorb from the coffee to reach a temperature of 89.0C?

*asked on January 31, 2011* -
## math

Write the first five terms of the sequence. (Assume that n begins with 1.) a (subtext)n =−7n+8 a. 8, 1, –6, –13, –20 b. 1, –6, –13, –20, –27 c. 1, –14, –21, –28, –35 d. 1,9,17,25,33 e. –15, –22, –36, –36, –43

*asked on August 27, 2016* -
## Physics

The Earth exerts an 640 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N.

*asked on January 13, 2016* -
## HELPPP

Solve the linear programming problem by the method of corners. Minimize C = 5x + y subject to x + 3y ≥ 43 x + y ≥ 27 x ≥ 0, y ≥ 0

*asked on April 18, 2011* -
## history

Step 1: Choose four of the following questions to ask Moses, Jesus, and Muhammad: Why is the Holy Land an important site for your faith? What is your perspective or feelings about the other monotheistic faiths? What is the holy book of your faith, and how

*asked on September 2, 2016* -
## physics

Hans uses a wheelchair. Although he has a rampto in his house, he finds it difficult to get his wheelchair up the ramp. Whcih modification would make it easier for Hans to get in his house? a. increase the length of the ramp b. increase the friction

*asked on February 23, 2010* -
## Math

A spherical balloon is to be deflated so that its radius decreases at a constant rate of 12 cm/min. At what rate must air be removed when the radius is 5 cm? Must be accurate to the 5th decimal place. It seems like an easy question but no matter how many

*asked on October 5, 2014* -
## Physical Science

When you do 100 J of work on the handle of a bicycle pump, the pump does 40 J of work pushing the air into the tire. What is the efficiency of the pump?

*asked on November 3, 2012* -
## Quadratics

Write the coordinates of the image of the pont (-3,9) on the graph y=x^2 when each of the following transformations are applied: a) a reflection in the x-axis followed by a vertical translation 4 units up b) a vertical stretch by a factor of 1/3 about the

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

Shortly after metric units were introduced in Australia, a group of 44 students was asked to guess, to the nearest meter, the width of the lecture hall in which they were sitting. The true width of the hall was 13.1 meters. Please find the mean of the

*asked on August 30, 2016* -
## Physics

A person pushes a 11.0 kg lawn mower at constant speed with a force of 76.0 N directed along the handle, which is at an angle of è = 41.0° to the horizontal. Calculate the normal force exerted vertically upward on the mower by the ground. Calculate the

*asked on November 28, 2011* -
## MATH

A paper bag contains a mixture of three types of treats: 12 granola bars, 10 fruit bars, and 8 cheese strips. Suppose that you play a game in which a treat is randomly taken from the bag and replaced, and then a second treat is drawn from the bag. You are

*asked on May 10, 2014* -
## math

Formulate a system of equations for the situation below and solve. A theater has a seating capacity of 660 and charges $2 for children, $4 for students, and $6 for adults. At a certain screening with full attendance, there were half as many adults as

*asked on March 28, 2011* -
## Physics

a 40kg girl and a 30kg boy face each other on friction free roller skates. the boy pushes the girl,

*asked on May 19, 2014* -
## Chemistry 1

I have trouble understanding ratios and relativity so I can't understand how to use atomic mass units. Here is an example from my book: How many grams of iron would contain the same number of iron atoms as the number of carbon atoms contained in 1.000 g of

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

Use an algebraic equation to find the measures of the two angles described below. Begin by letting x represent the degree measure of the angle's supplement. The measure of the angle is two times greater than its supplement.What is the measure of the

*asked on September 17, 2019* -
## algebra

Goran invested his savings in two investment funds. The amount he invested in fund A w!@#$%^&2000 less than the amount he invested in fund B. Fund A returned a 3% profit and fund B returned a 2% profit. How much did he invest in fund A, if the total profit

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

In rectangle ABCD, if the coordinates of A are (0, 0) and the coordinates of C are (r, s), find the coordinates of B.With A and D being on the bottom line and B and C on the top with B over A.

*asked on July 6, 2011* -
## Geometry

1. An airplane is flying at 36,000 feet directly above Lincoln, Nebraska. A little later the plane is flying at 28,000 feet directly above Des Moines, Iowa, which is 160 miles from Lincoln. A.assuming a CONSTANT rate of descent, what was the angle of

*asked on March 26, 2012* -
## math

A transformation T : (x, y) (x + 3, y + 1). The image of B(4, 1) is

*asked on July 17, 2011* -
## AP Chemistry

Which response includes all of the following LiOH, KOH, Ni(OH)2, Mg(OH)2, Ca(OH)2 that are insoluble bases, and no others?

*asked on October 13, 2010* -
## science

Compare the costs and benefits of hydropower to that of geothermal power. (Please include two costs and two benefits.)

*asked on September 23, 2016* -
## physics

A person walks first at a constant speed of 5.10 m/s along a straight line from point circled A to point circled B and then back along the line from circled B to circled A at a constant speed of 3.15 m/s.(a) What is her average speed over the entire trip?

*asked on January 21, 2015* -
## Math

Determine whether each verbal description represents a linear function or not. Correct me if I'm wrong on any of these!! 1. Jova walks quickly for 25 minutes then she rests for 5 minutes before continuing on for another 10 minutes. (NOT A LINEAR FUNCTION)

*asked on October 30, 2013* -
## Math

You want to estimate the mean amount spent by customers at a local gas station with 98% confidence and a margin of error of no more than $2. Preliminary data suggests that the standard dev. is $5.1 is a reasonable estimate for the standard dev. for all

*asked on February 19, 2011* -
## history

Cyril and Methodius were missionaries to the Slavs who A.translated the Bible into the new alphabet written for the Slavic language B. were excommunicated by Pope Gregory II for their Slavic writings supporting icons C.were iconoclasts who spoke out

*asked on August 29, 2016* -
## statistics

A study of two types of weed killers was done on two identical weed plots. One weed killer killed 15% more weeds than the other. This difference was significant at the 0.05 level. What does this mean? A. The improvement was due to the fact that there were

*asked on April 16, 2015* -
## Chemistry

The heat of fusion for water is 80cal/g. The specific heat of liquid water is 1.00cal/g. How many calories of heat are released when 20g of water at 30 degrees is cooled to 0 degrees and frozen to ice at 0 degrees?

*asked on July 19, 2010* -
## Geometry

*asked on September 18, 2019* -
## Foundations Math 12

48 weeks ago, Gabriella invested at 3.9% interest, compounded weekly. Today, her investment is worth $225.50. How much interest has Gabriella's account earned in the past 48 weeks?

*asked on February 16, 2014*