# jacob

Popular questions and responses by jacob-
## AR

How many 5-pound bags of apples can be made from 400 apples, each weighing ¼ pound?

*asked on April 11, 2016* -
## Physics (answers included)

Two mountains are 1.00 km apart. If their masses are identical (2.00 × 1010 kg), what is the force due to gravity between the mountains? Fg=(GMm)/ r^2 =(6.67x10^-11 N*m^2/kg^2)(1010kg) (1010kg)/ (1000m)^2 =6.80x10^-11 N But the possible answers are: 2.67x

*asked on November 22, 2009* -
## Chem answer check/ help

For each of the following water-soluble compounds, indicate the ions present in an aqueous solution: NaI K2SO4 NaCN Ba(OH)2 (NH4)2SO4 would the answer to NaI be Na+ I-? Should there be more to my answer? Would K2SO4 be K+ SO-? Thanks for the explanation.

*asked on February 22, 2010* -
## Applied Calculus

If an open box is made from a tin sheet 7 in. square by cutting out identical squares from each corner and bending up the resulting flaps, determine the dimensions of the largest box that can be made. (Round your answers to two decimal places.) Height:

*asked on March 8, 2013* -
## math

a cylindrical container has a diameter of 14cm and a height of 20cm and is full of water. The water is poured into another cylinder which has a diameter of 20cm. How deep is the water in the second cylinder?

*asked on June 6, 2015* -
## Statistics

Suppose I am using the t-distribution to estimate or test the mean of a sample from a single population. If the sample size is 25, then the degrees of freedom are ____? I have an answer of 26 is this correct

*asked on June 17, 2010* -
## Maths

divide 405 in the ratio 3:12 give your final answer in the form ... and ...

*asked on April 1, 2020* -
## Statistics

Which of the following can be classified as Discrete and Quantitative data. The acceleration of your car as you drive to school. my answer was number of neighbors still unsure of this though The different colors of the eyes of your classmates. The number

*asked on June 16, 2010* -
## Physics

The patient in the figure below is to receive an intravenous injection of medication. In order to work properly, the pressure of fluid containing the medication must be 108 kPa at the injection point. (a) If the fluid has a density of 1024 kg/m3, find the

*asked on January 15, 2013* -
## technology

1. Science is the body of knowledge and methods produced by engineering. True False 2. Technology changes society. True False 3. Although engineers do not always complete the steps of design process in the same order which of the following is almost always

*asked on September 10, 2018* -
## Applied Calculus

Find the absolute extrema of the function on the interval [2,3]. (Round your answers to the nearest hundredth.) Absolute Minimum ___ at x=___ Absolute Maximum ___ at x=___

*asked on April 12, 2013* -
## technology

1. Science is the body of knowledge and methods produced by engineering. True False 2. Technology changes society. True False 3. Although engineers do not always complete the steps of design process in the same order which of the following is almost always

*asked on September 9, 2018* -
## leadership development

1.Even though Mike is a great basketball player, he tries with just half effort on drills during practice. This is an example of A wasting talent B getting distracted C allowing others to set goals 2.Jim would like to get a summer internship, but his dad

*asked on June 11, 2016* -
## algebra 10 grade

Factor this expression completely 36y2 - 1

*asked on December 7, 2009* -
## chemistry

Which one of the following is NOT a Lewis acid-base reaction? 1. ) Ca + S --> Ca2+ + S2- 2. ) BeF2 + 2 F- --> BeF42- 3. ) H+ + -O-H --> H-O-H 4. ) NH3 + BF3 --> H3N-BF3 i thought it was 1...but im not sure...but i know that 3 & 4 are definatly right.

*asked on November 8, 2009* -
## Health

Which eating disorder might be discovered by a dentist anorexia bulimia*** starvation diet obesity

*asked on May 7, 2016* -
## math

Bill, Ernie, Oscar, Sammy and Tony are the five basketball players on the starting team of the varsity squad. Each one is known by a different one of these five nicknames: Slats, Stretch, Tiny, Tower, and Tree. From the information given, determine the

*asked on February 24, 2010* -
## Math

Dan will donate up to $480 to charity. The money will be divided between two charities: the City Youth Fund and the Educational Growth Foundation. Dan would like to donate at least to the Educational Growth Foundation. He would also like the amount donated

*asked on July 13, 2018* -
## Math

Work out the product of 1 2/3 and 2 3/4 Give your answer as a mixed number.

*asked on April 15, 2020* -
## Physics

A frog in a hemispherical pod finds that he just floats without sinking in a fluid with a density of 1.33 g/cm3. If the pod has a radius of 5 cm and negligible mass, what is the mass of the frog? Answer in units of kg.

*asked on February 19, 2018* -
## Chemisrty

To what volume must 1.0 l of a 6.0 m solution of hcl be diluted in order to prepare a 0.2 m solution? I just need to find wht steps i need to take to get the answer

*asked on April 27, 2015* -
## Chemistry

A sample of nitrogen gas at 298 K and 745 torr has a volume of 37.42 L. What volume will it occupy if the pressure is increased to 894 torr at constant temperature?

*asked on July 11, 2011* -
## Statistics

What is meant by the 95% confidence interval of the mean ? That 95% of my sample is OK to do more tests. That I am 95% confident that the confidence interval will contain the parameter being estimated. That 5% of my sample is not OK. That I am 95% sure

*asked on June 22, 2010* -
## Statistics

A football team’s coach predicts that his team will win 9 out of 10, or 90%, of its games. Which method did he most likely use to make this prediction my answer to this is relative frequency is this correct equally likely outcomes intuition law of large

*asked on June 15, 2010* -
## Chem answer check

Which of the following are strong electrolytes? BaCl2 AgNO3 PbI2 Pb(NO3)2 KI I think they are all strong electrolytes. Is this correct?

*asked on February 22, 2010* -
## Pre calc

Perform the indicated operation and simplify the result . Cot x(tan x- sec x) Please help , I am struggling a lot !! Thank you!!!

*asked on January 18, 2018* -
## math

what household items come in fourths or halves?

*asked on March 31, 2011* -
## Physics

A bear spies some honey and takes off from rest, accelerating at a rate of 2.3 m/s2.v If the honey is 18 m away, how fast will his snout be going when it reaches the treat?

*asked on September 20, 2012* -
## IT

Draw a flowchart or write the pseudocode for an application that allows a user to enter price and computes 8 percent sales tax on the item. Use // declartions

*asked on September 5, 2012* -
## Statistics

. As the sample size increases The confidence interval also increases (gets larger) The confidence interval decreases (gets smaller) The confidence interval stays the same The population mean increases.

*asked on June 22, 2010* -
## Math

A box weighing 700 pounds is on a ramp inclined at 15 degrees with the horizontal. Find the force necessary to prevent the box from sliding down the ramp.

*asked on April 20, 2017* -
## PreCalc

Suppose that $14,000 is invested in a savings account paying 5.2% interest per year. (a) Write the formula for the amount A in the account after t years if interest is compounded monthly.

*asked on December 4, 2016* -
## Algebra

The surface of the Grand Lake is at an elevation of 648 feet. During the current drought, the water level is dropping at a rate of 3 inches per day. If this trend continues, write an equation that gives the elevation in feet of the surface of Grand Lake

*asked on September 14, 2016* -
## Math Functions

Write two equations to represent the same exponential function with a y-intercept of 5 and an asymptote at y=3 . Investigate whether other exponential functions have the same properties. Use the transformations to explain your observations.

*asked on July 26, 2015* -
## Math

A fence is to be built to enclose a rectangular area of 310 square feet. The fence along three sides is to be made of material that costs 3 dollars per foot, and the material for the fourth side costs 14 dollars per foot. Find the dimensions of the

*asked on December 11, 2014* -
## Applied Calculus

Find the absolute maximum and absolute minimum values, if any, of the function. (If an answer does not exist, enter DNE.) h(x) = x3 + 3x2 + 4 on [−3, 2]

*asked on March 6, 2013* -
## Math

A copy machine makes 60 copies per minute. A second copy machine makes 80 copies per minute. The second machine starts making copies 2 minutes after the first machine starts. Both machines stop making copies 8 minutes after the first machine started.

*asked on February 6, 2013* -
## Physics

Joe wishes to hang a sign weighing 730 N so that cable A, attached to the store, makes a 30.0° angle, as shown below. Cable B is horizontal and attached to an adjoining building. What is the tension in cable B?

*asked on November 17, 2012* -
## Math

A rectangle with vertices at (2,5), (7,5), (7,8) and (2,8) is revolved around the line y=5 to obtain a cylinder. What is the volume of the cylinder? Express your answer in terms of pi.

*asked on December 6, 2011* -
## geometry

Use formulas to find the lateral area and surface area of the given prism. The base of the prism is the rectangle with sides of length 13m and 5m. Show your answer to the nearest whole number.

*asked on August 9, 2011* -
## Statistics

Assume that about 45% of all U.S. adults try to pad their insurance claims. Suppose that you are the director of an insurance adjustment office. Your office has just received 110 insurance claims to be processed in the next few days. What is the

*asked on June 26, 2010* -
## Math

12. Mixing red and blue gives purple, blue and yellow gives green, and red and yellow gives orange. A spinner is blue and red. Another one is blue, red, and yellow. If the pointers of both spinners are spun, find each probability. a) The resulting colour

*asked on June 10, 2020* -
## pre calculus

A force of 350 lb. is resolved into forces at right angles to one another, the angle of F2 being 67 from the 350 lb. force. Find F2.

*asked on January 2, 2019* -
## science

how do u prepare a 250-ml of 2.35 M HF dilution from a 15.0 M stock solution?

*asked on November 28, 2018* -
## Physics

A diver springs upward with an initial speed of 2.93 m/s from a 3.0-m board. (a) Find the velocity with which he strikes the water. [Hint: When the diver reaches the water, his displacement is y = -3.0 m (measured from the board), assuming that the

*asked on May 10, 2017* -
## physics

a toy car rolls horizontally on to a ramp that has a total height of 0.8m. what minimum velocity will allow the car to reach the top of the ramp/

*asked on January 3, 2015* -
## Math-Calculus

Find the point on the line -2x + 4y + 3 =0 which is closest to the point (-2,1). Note: I have been struggling on this for hours!

*asked on December 11, 2014* -
## Physics

A golfer, standing on a fairway, hits a shot to a green that is elevated 5.50 m above the point where she is standing. If the ball leaves her club with a velocity of 46.0 m/s at an angle 0f 35.0º above the ground, find the time that the ball is in the air

*asked on February 17, 2014* -
## Applied Calculus......

A book designer decided that the pages of a book should have 1-in. margins at the top and bottom and 1/2 in. margins on the sides. She further stipulated that each page should have an area of 60 in.2. Find a function in the variable x, giving the area of

*asked on January 29, 2013* -
## Math

water accounts for about 60% of a person's body weight. a. write an equation that represents the water y of a person who weights x pounds. identify the independent variable and the dependent variable. b. make an input-output table for the equation in part

*asked on February 9, 2018* -
## Maths

Find the interquartile range for a set of data if 75% of the data are above 2.6 and 25% of the data are above 3.7.

*asked on August 16, 2017* -
## Health

People who experience episodes of _______ are not eating out of hunger; they are acting out of behaviors associated with bulimia and depression anorexia starvation dieting binge eating*** fasting

*asked on May 7, 2016* -
## physics

A typical red blood cell subtends an angle of only 1.7×10−5 rad when viewed at a person's near-point distance of 25 cm. Suppose a red blood cell is examined with a compound microscope in which the objective and eyepiece are separated by a distance of

*asked on April 21, 2016* -
## Math

William rode his bike 20 miles in 2 hours. Lorie rode her bike 30 miles in 2.5 hours. If they both continue at the same rate, how many more miles will lorie travel in 4.5 hours than William?

*asked on March 7, 2016* -
## english

A prepositional phrase modifies a word and relates that word to the preposition's _____.

*asked on June 18, 2015* -
## Math

Prime factorize the following using factor tree method: 66, 99, 20, 108, 37 and 450

*asked on June 4, 2015* -
## Physics

A dart gun is aimed horizontally at the center of a large target 150 m away. The initial velocity of the dart is 450 m/s. (Ignore air resistance) a) Where does the dart strike the target (relative to the center of the target)? b) To hit the center of the

*asked on December 6, 2014* -
## math

A certain ball is dropped from an altitude of 1 meter and rebounds one-half of it's previous altitude. What is the total distance the ball has traveled when it hits the floor the 40th time?

*asked on September 5, 2013* -
## Physics

Jim is 100m(S) of Paul. Paul begins to walk east at 2.0m/s the same time Jim begins to walk west at 3.0m/s. what is the displacement of Jim from Paul 20 seconds later? Please explain steps Answer is 141(SW)

*asked on July 4, 2013* -
## Applied Calculus

For its beef stew, Betty Moore Company uses aluminum containers that have the form of right circular cylinders. Find the radius and height of a container if it has a capacity of 29 in.3 and is constructed using the least amount of metal. (Round your

*asked on April 2, 2013* -
## Applied Calculus

Find the derivative of the function: (x^(3)-8)/(x^(2)+9)

*asked on February 18, 2013* -
## Applied Calculus

Find the derivative of the function f by using the rules of differentiation. f(x)=340

*asked on February 11, 2013* -
## Science!

How many grams of NH3 gas can be made if 42.0 g of N2 gas and 12.0 g of H2 gas react with each other? N2 + 3 H2 ↔ 2 NH3

*asked on February 11, 2013* -
## Percent word problem

A pitcher holds 2 gallons of orange juice. The orange juice is made 20% concentrated juice and 80% water. How much water is used in the orange juice?

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

A snail crawled for 40 seconds at an average speed of 15 millimeters per second.Explain how to find the distance the snail traveled in centimeters

*asked on April 17, 2012* -
## consumer mathB

Your box of raisin bran cost $1.89 last year. This year it costs $2.25. What is the inflation rate?

*asked on November 3, 2011* -
## Algebra

Pauline sells computers on commission. She spends 2 hours on selling a laptop and 1 hour on selling a desktop computer. She works no more than 40 hours per week and routinely sells at least 1 laptop and at least 4 desktops each week. To maximize her

*asked on April 26, 2011* -
## Math

Of the first graders who were asked, 1/6 like math best, 2/3 liked reading best, and 12 liked science best. How many were asked their favorite subject?

*asked on April 15, 2011* -
## Math

Of the first graders who were asked, 1/6 like math best, 2/3 liked reading best, and 12 liked science best. How many were asked their favorite subject?

*asked on April 15, 2011* -
## Chemistry

I need a creative title for a lab report that deals with using dalton's partial pressure law in order to determine the amount of hydrogen gas that was collected over water. any ideas?

*asked on December 15, 2010* -
## Statistics

Richard has been given a 5-question multiple-choice quiz in his history class. Each question has four answers, of which only one is correct. Since Richard has not attended the class recently, he does not know any of the answers. The success occurs if

*asked on June 15, 2010* -
## physics

A student throws a 9 gram of gum is thrown across the physics lab from a distance of 2.5 m. When the gum has a horizontal velocity of vo it connects with a mass on the end of 1.62 kg simple pendulum which is initially at rest. The pendulum has a length of

*asked on April 12, 2010* -
## algebra 1

Factor this expression completely 9a4 - b2

*asked on December 7, 2009* -
## Chemistry - Urgent

Determine the mass of 3.16 ×1023 atoms Cl. Answer in units of g. How do you do this? Need to get it done really fast. Thanks for help.

*asked on October 11, 2009* -
## Math

A rectangle has a width if 10 inches and an area of 5 square inches. What is the length of the rectangle?

*asked on October 8, 2007* -
## chemistry

Which solution would CaC2O4 be most soluble in? Na2C2O4 NaHC2O4 H2C2O4 NaCl HCl I due to common ions i think it would be one of the first three and i think it is Na2C2O4 because the other 2 have Hydrogen. Is it Na2C2O4? No, the common ions work just the

*asked on April 7, 2007* -
## Math

13. A bag contains 5 red marbles, 3 blue marbles, and 4 yellow marbles. A students removes 1 marble without looking, records the colour, then returns the marble to the bag. The process is repeated. What is the probability of NOT a red marble, then NOT a

*asked on June 14, 2020* -
## mathematics

Jenny bought scrapbooking supplies for $156.50. She paid $10.17 in sales tax. What was the sales tax rate on the supplies?

*asked on April 30, 2020* -
## Math

There was water damage to personal property in a home. The items damaged were originally priced at $4000. The items lose value by 11% per year. The items were four years old when they were damaged. The owner had actual cash value coverage with a deductible

*asked on April 13, 2020* -
## math

factorize the following expressions and if possible show your steps 4x+20 3y^2+12y x^2+4y-21

*asked on June 11, 2019* -
## math

a boat took 5 hours to travel 60 km up a river, against the current. the return trip took 3 hours. find the speed of the boat in still water and the speed of the current. if possible, show your steps

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

the sum of the squares of two consecutive integers is 365. find the integers using the quadratic formula. if possible, show your steps! :)

*asked on June 2, 2019* -
## math

I missed a lesson today on factoring and was wondering if i can get some help here for example, let's use 2x^2+5x+3

*asked on May 25, 2019* -
## math

A cat is sitting on top of a tree, and spots a dog 10m south of the tree with an angle of depression of 65 degrees. Then it spots a firefighter a certain distance east of the tree with an angle of depression at 50 degrees. How far is the dog from the

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

The expression (x^3 )(x^(-17) ) is equivalent to (x^n). What is the value of n?

*asked on March 28, 2019* -
## Algebra help

Two less than three-fourths of a number is 10. What is the number? A. 10 2/3 B. 13 1/3 C. 15 1/3 D. 16 Please help meh! God bless you :-)

*asked on December 12, 2018* -
## Spanish Future tense

Rewrite the paragraph in the future tense. Mi amiga y yo vamos a viajar a España este verano. Ella va a ir más temprano y va a pasar una semana en Madrid sin mí. Yo voy a llegar más tarde y nosotras vamos a reunirnos en Sevilla. Vamos a pasar tiempo

*asked on October 22, 2018* -
## Spanish

Completa cada oración con la forma correcta de SER o ESTAR. 1.Después del semestre, los estudiantes __________ muy cansados. 2.Mis compañeros y yo __________ trabajando en el mismo proyecto. 3.Esas __________ ideas muy buenas. Las voy a usar para la

*asked on October 22, 2018* -
## math

Describe and correct the error made in solving the literal equation at the right for n. 2m = -6n + 3. 2m + 3 = -6n. 2m + 3/-6 = n

*asked on September 11, 2018* -
## Vectors

Find the intersection of those two lines r=(2,9)+s(1,1) and r= (-3,2) + t(1,2) and then find the area of the triangle whose vertices are the intersection point, s = 0 on L1 and t = 3 on L2. I already found the point of intersection. I just need to know how

*asked on June 18, 2018* -
## math

A charity raffle offers a first prize of $1,000,000, a second place prize of $100,000 and a third place prize of $10,000. A total of 500 000 tickets will be sold. What price should be charged for a ticket in order for the charity to make a 60% profit on

*asked on April 24, 2018* -
## Chemistry

2. Solid ammonium iodide decomposes to yield ammonia gas(NH3) and hydrogen iodide gas at 400oF. The equilibrium constant for this reaction is 0.215. Ten grams of ammonium iodide are sealed in a 10.0 L flask at equilibrium. Complete the following: a. Write

*asked on March 13, 2018* -
## Pre calc

Perform the indicated operation and simplify the result Tanx(cotx-cscx)

*asked on January 29, 2018* -
## Physics

On a very muddy football field, a 100 kg linebacker tackles an 75 kg halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.5 m/s north and the halfback is sliding with a velocity of 7.5 m/s east. What is the magnitude

*asked on November 24, 2017* -
## maths

A 60m long bridge has an opening in the middle and both sides open up to let boats pass underneath. The two parts of the bridge floor rise up to a height of 18 m. Through what angle do they move?

*asked on May 24, 2017* -
## Chemistry

Urea, which has the chemical formula (NH2)2CO, is a fertilizer that can be prepared by reacting ammonia (NH3) with carbon dioxide (CO2). Given the following chemical equation, what is the theoretical yield of urea (in grams) if 4.16 mol ammonia is the

*asked on March 4, 2017* -
## algebra

Jane has $4.50 in pennies, nickels and dimes. She has twice as many pennies as she has nickels and dimes combined. How many of each coin does she have?

*asked on January 20, 2017* -
## math

A bag contains 45 marbles of various colors. Jon draws 60 times, each time replacing the marble before drawing again. He gets a total of 12 blue marbles. Which is best prediction of how many blue marbles are in the bag?

*asked on January 18, 2017* -
## math

Tommy walked 3 2/7 miles. write the distance Tommy walked as an improper fraction. A.4 B.4/3

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

Using trigonometric ratios find the remaining side lengths and angle measurements to 2 decimal places each: (a) α = 35°, β = 90°, a = 30 (b) α = 90°, b = 7, c = 6 (c) a = 33, b = 56, c = 65

*asked on November 21, 2016*