# jeff

Popular questions and responses by jeff-
## Algebra PLEASE?

Using the numbers 5, 8, and 24, create a problem using no more than four operations (addition, subtraction, multiplication, division, square, square root, cube, cube root) where the solution will be an irrational number. Explain why the result of your

*asked on January 6, 2015* -
## calculus

7. A cardboard box manufacturer wishes to make open boxes from rectangular pieces of cardboard with dimensions 40 cm by 60 cm by cutting equal squares from the four corners and turning up the sides. Find the length of the side of the cut-out square so that

*asked on July 30, 2011* -
## Physics

Two airplanes leave an airport at the same time. The velocity of the first airplane is 730 m/h at a heading of 44.6 degrees. The velocity of the second is 610 m/h at a heading of 100 degrees. How far apart are they after 2.3 h? Answer in units of m.

*asked on September 18, 2015* -
## HISTORY

To rule his empire successfully, Hammurabi instructed his own governors A to teach local rulers B to rule distant cities C to train his sons to rule. B to cut off communication with the outside world

*asked on September 25, 2018* -
## language arts

what are some examples of benign foods

*asked on August 16, 2015* -
## Physics

The x component of vector is 5.3 units, and its y component is -2.3 units. The angle that vector makes with the +x-axis is closest to

*asked on December 11, 2017* -
## algebra

Andrea is making a sandbox.She has made a wooden frame in her backyard that is 6 feet long, 6 feet wide, and 2 feet deep. She can purchase sand for $30 per cubic meter. How much will it cost for her to purchase sand? Hint: 1 foot equals 0.3048 meters.

*asked on May 25, 2018* -
## Operations Management

Joe Henry's machine shop uses 2,500 brackets during the course of a year. These brackets are purchased from a supplier 90 miles away. the following information is known about the brackets. annual demand 2,500 holding cost per bracket per year $1.50 order

*asked on July 6, 2011* -
## Math Algebra

The coordinates of quadrilateral VXY Are given below. Find the coordinates of its image after a dilation with the given scale factor V(6, 2), W(-2, 4), X(-3, -2), Y(3, -5) scale factor of 2 This question is confusing me and is worth 3 points please help :)

*asked on October 18, 2014* -
## calculus

A flag pole is 40 feet high and stands on level ground. a flag is attached to a 120 foot rope passing through a pulley at the top of the flagpole. The other end of the rope is tied to a car at ground level. If car was driving directly away from flagpole at

*asked on October 26, 2009* -
## trigonometry

the bases of a trapezoid are 22 and 12 respectively. The angles at the extremities of one base are 65^ and 40^ respectively. Find the two legs

*asked on September 1, 2013* -
## Mathematics

Four times the larger of two consecutive even integers is ten less than the smaller What is the larger of these two numbers

*asked on May 17, 2020* -
## chemistry

Write the balanced equation for the reaction of aqueous Pb(ClO3)2 with aqueous NaI. Include phases. What mass of precipitate will form if 1.50 L of highly concentrated Pb(ClO3)2 is mixed with 0.350 L of 0.290 M NaI? Assume the reaction goes to completion.

*asked on October 10, 2015* -
## Organic Chemistry

How am I supposed to do these questions? I'm completely lost. A 0.120 M solution of an enantiomerically pure chiral compound D has an observed rotation of 0.12° in a 1-dm sample container. The molar mass of the compound is 130.0 g/mol. (b) What is the

*asked on November 8, 2015* -
## MATH HELP PLEASE

1. What is the product of (5.1 × 10^3) • (3.2 × 10^3)? (1 point) 16.32 × 10^6 1.632 × 10^7 16.32 × 10^9 1.632 × 10^10 2. What is the product of (7.28 × 10^-2) • (9.1 × 10^-2)? (1 point) 6.6248 × 10^-3 66.248 × 10^-4 6.6248 × 10^4 66.248 ×

*asked on September 30, 2014* -
## physics

A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 6.10s later. What was the rocket's acceleration?

*asked on September 6, 2008* -
## English

Which type of figurative language is found in lines 6 and 7? (1 point) symbol metaphor personification* (my awnsor) simile What can you conclude from the figurative language you identified in the previous question? (1 point) The flowers’ smell was too

*asked on February 27, 2019* -
## Physics

A 0.62-mm-diameter copper wire carries a tiny current of 2.0 μA . The molar mass of copper is 63.5 g/mole and its density is 8900 kg/m3. NA=6.02×1023 Estimate the electron drift velocity. Assume one free electron per atom.

*asked on March 4, 2018* -
## Math

state whether each relation y=f(x) describes a quadratic function or not

*asked on June 18, 2014* -
## Language Arts

1-"I saw a great many kindly acts done as we moved along," White would recall almost fondly. "The poor helped the rich, and the rich helped the poor (if anybody could be called rich at such a time) to get on with their loads. I heard of cartmen demanding

*asked on September 25, 2020* -
## Physics

An arrow is shot from a height of 1.5 m toward a cliff of height . It is shot with a velocity of 30 m/s at an angle of 60 deg above the horizontal. It lands on the top edge of the cliff 4.0 s later. (a) What is the height of the cliff? (b) What is the

*asked on January 31, 2016* -
## math

Sara drives 72 miles on 3.2 gallons of gas. She uses this information to calculate how many miles per gallon she can drive. Using this result, how many miles can Sara drive on 13.3 gallons of gas?

*asked on April 9, 2014* -
## Microeconomics

Four roommates are planning to spend the weekend in their dorm room watching old movies, and they are debating how many to watch. Here is their willingness to pay for each film: Orson Alfred Woody Ingmar Frist film 7 5 3 2 Second film 6 4 2 1 Third film 5

*asked on September 29, 2006* -
## Trigonometry

If a point on the Cartesian plane lies at (4, 2), what is the angle made between the line containing the point and the origin, and the negative y-axis? a) 1.249 radians b) 0.463 radians c) 0.523 radians d) 1.047 radians

*asked on June 18, 2020* -
## Physics

A ballistic pendulum was a device used in the past century to measure the speed of bullets. The pendulum consists of a large block of wood suspended from long wires. Initially, the pendulum is at rest. The bullet strikes the block horizontally and remains

*asked on October 26, 2012* -
## calculus

The driver of a car traveling at 60 ft/sec suddenly applies the brakes. The position of the car is s(t) = 50t - 2t2, t seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop?

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

construct a nondiagonal 2 x 2 matrix that is diagonalizable but not invertible. Just write down a diagonal matrix with one zero on the diagonal and then apply an orthogonal transformation. E.g. if you start with the matrix: A = [1 ,0 0,1] And take the

*asked on July 12, 2007* -
## Math algebra Help please

A right triangle has an area of 24 ft^2 the dimensions of the triangle are increased by a scale factor of 6 A.48ft^2 B.72ft^2 C.144ft^2 D.864ft^2

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

Police find skid marks 60 m long on a road showing where a car made an emergency stop. Assuming that the deceleration was -10m/s2, how fast was the car going?

*asked on February 9, 2014* -
## LA

What was the Supreme Court's ruling on the Dred Scott case? Dred Scott should be considered free since he had lived in many states where slavery was banned. Dred Scott could be free if he paid a fee. Dred Scott was still a slave and not a citizen. The case

*asked on April 10, 2013* -
## math

write an equation of the line containing the given point and parallel to the given line (-2,3)2x=7y+9

*asked on December 5, 2009* -
## calculus

A ball of radius 10 has a round hole of radius 5 drilled through its center. Find the volume of the resulting solid.

*asked on February 12, 2008* -
## Math

A street light is at the top of a 16 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 8 ft/sec along a straight path. How fast is the tip of her shadow moving along the ground when she is 30 ft from the base of the pole? How fast is

*asked on November 12, 2015* -
## social studies

In the years after World War II, which of the following caused many people from Asian and African countries to migrate to Europe? A. the end of the Soviet Union B. new economic opportunities after colonialism ended C. the religious freedom found in Europe

*asked on May 9, 2019* -
## History

Why did the Founders decide that it was important to clearly define the crime of treason in the Constitution? A: because most people never heard of it i think b, to stop people from commiting treason* C: to keep the goverment from abusing the charge D:

*asked on October 23, 2019* -
## Math

What number whose sum of its digit is 26 become 6000 when rounded to the nearest thousand? List 3 pissible answer.

*asked on June 20, 2017* -
## Physics help!!

A plane is flying horizontally at constant speed, vo. when it releases a package. The package lands on the ground at t seconds later. Just before the package lands... a. What is its horizontal component of velocity? Leave in terms of vo and t. b. What is

*asked on September 25, 2015* -
## chemistry

net ionic equation for reaction between copper carbonate and the hydroiodic acid

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

state whether each relation y=f(x) describes a quadratic function or not y=3-x^2

*asked on June 18, 2014* -
## Science

What is a substance that cannot be separated into simpler substances by physical or mechanical methods such as filtering, boiling, or sifting?

*asked on October 25, 2013* -
## Chemisty

Based on the standard analytical practice during a titration of taking pH-volume measurements every 0.3 pH units, how many measurements should you take between the addition of 5mL and 7.5mL of titrant, a) in the titration of a 10mL aliquot of standard

*asked on April 8, 2016* -
## Algebra Help please?

what is the value in "x" in 16^2 = x

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

How many grams of oxygen are required to react with 0.128 lead(II) sulfide?

*asked on April 8, 2010* -
## Math

a parabola has vertex (-6,-12) AND PASSES THROUGH (6,24) find its equation in the form ax^2+bx+c

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

A model rocket is launched from rest with an upward acceleration of 6.30 m/s2 and, due to a strong wind, a horizontal acceleration of 1.50 m/s2. How far is the rocket from the launch pad 5.30 s later when the rocket engine runs out of fuel?

*asked on September 9, 2015* -
## algebra

what is the algebraic expression for the following word phrase the quotient of 5 and the diffence of x and z a. 5-x/z b. 5-x/z c. x-z/5 d. 5/x-z

*asked on October 2, 2020* -
## social studies

Why do Northern Ireland, Scotland, and Wales now have their own legislatures? A. The United Kingdom joined the European Union. B. The United Kingdom government is growing more regional. C. The British Parliament had grown too large to be efficient. D. All

*asked on May 13, 2019* -
## Algebra

What are the first four terms of an arithmetic sequence if the common difference is 1.5 and the first term is 15? 15,30,45,60 15,16.5,18,19.5 15,22.5,33.75,50.625 none of the above What are the first four terms of a geometric sequence if the common ratio

*asked on March 9, 2015* -
## Math

Find the set of all z such that neither 2+z nor 2-z is in the interval (-1,1]. Express your answer as an interval or as a union of intervals.

*asked on November 28, 2016* -
## Math-probabilities

The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Cause Deaths

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

A spring is attached to the ceiling and pulled 12 cm down from equilibrium and released. The amplitude decreases by 17% each second. The spring oscillates 16 times each second. Find an equation for the distance, D the end of the spring is below equilibrium

*asked on March 1, 2015* -
## physics

A children's merry-go-round in a park consists of a uniform 200kg disk rotating about a vertical axis. the radius of the disk is 6 m and a 100kg man is standing on the outer edge when the disk is rotating at a speed of 0.20rev/s. how fast will the disk be

*asked on November 21, 2009* -
## College Physics

The only force acting on a 3.9 kg body as it moves along the positive x axis has an x component Fx = - 6x N, where x is in meters. The velocity of the body at x = 3.0 m is 8.0 m/s. (a) What is the velocity of the body at x = 4.0 m? (b) At what positive

*asked on October 25, 2009* -
## Math

73 in. = __ft. A: 876 ft. B: 6 1/2 ft.

*asked on October 23, 2019* -
## Physics

What is the magnitude of the electric field at a point midway between a −8.3μC and a +5.4μC charge 10cm apart? Assume no other charges are nearby.

*asked on February 11, 2018* -
## Math

Determine the most probable next term in the following list of numbers. 1, 7, 1, 1, 7, 1, 1, 1, 7, 1, 1, 1, 1, 7, 1, 1, 1, 1 The most probable next term is______

*asked on March 9, 2016* -
## Chemistry

Arrange the following compounds in order of decreasing ease of elution from a column of silica gel: a) 2-octanol; b) 1,3-dichlorobenzene; c) tert-butylcyclohexane; d) benzoic acid

*asked on February 4, 2015* -
## Spanish 9th grade

Is this how I say the spider is smaller than the lizard? La araña es más pequeña que la iguana.

*asked on October 5, 2011* -
## math

A manufacturer of light bulbs knows that 3% of the production of their 60W bulbs will be defective. What is the probability that exactly 5 bulbs in a carton of 144 will ne defective?

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

How many different paths will spell the word BINOMIAL in the following arrangement(moving diagonally downwards to the left or right)? B I I N N N O O O O M M M I I A L L My Answer: Starting from B using Pascal's Triangle B 1 1 1 2 1 1 3 3 1 4 6 4 10 10 20

*asked on January 9, 2011* -
## Physics

A 0.500 kg object is thrown vertically upward with an average applied force of 8.20 N by a student. The force is applied through a displacement of 1.50m. a. What is the average net force acting on the object? b. What is the velocity of the object when it

*asked on January 13, 2016* -
## Reading Skills

The answer to this question IS NOT "B". What is the answer to the following question. Inside the bus, in his summer Class-A uniform with its brass glitter and infantry-blue shoulder cordon, Jamie Sabin was going home. Fort Benning would be a fading dream;

*asked on December 17, 2013* -
## physics

A wire that is 70 cm long, carrying a current of 6.5 A, is at right angles to a uniform magnetic field. The magnitude of the force acting on the wire is 0.60 N. What is the strength of the magnetic field?

*asked on March 10, 2013* -
## 12th grade

The area of a circle is 28.26 square centimeters. What is its diameter (use 3.14 for ð)?

*asked on July 20, 2010* -
## Physics

Does blue light or orange light have a larger index of refraction? Blue light is bent more by a prism than orange light. Does blue light or orange light have a larger index of refraction in glass? A. Blue B. Orange If you know the answer to this, could you

*asked on October 29, 2009* -
## chemistry

a) how much heat is required to convert the ice to water that is also 0.00 C? b) how much heat would be required to warm this water from 0.00 C to 17.50 C? HELP!! I think the fusion is 333 J/g at 0 C... But I'm not sure what to do with that.

*asked on September 7, 2008* -
## Science

What is a polyatomic ion? A polyatomic ion is an ion composed of more than one kind of atom. For example, the hydrogen carbonate ion, HCO3^- (also called bicarbonate), ammonium ion (NH4^+), oxalate ion (C2O4^-2), phosphate ion (PO4^-3), sulfate ion

*asked on January 7, 2007* -
## english

compare and contrast the words maneuver and manipulate

*asked on September 20, 2015* -
## business mathematics

What is the cash discount and net amount paid if the gross amount of the invoice or freight paid is 7000$, freight charged is 100$, date of invoice is 4/8, terms of service is 2/10, n/60, and date of payment is 4/15?

*asked on February 13, 2012* -
## Math

Find the slope of the line that goes through the given points. I think I figured out the answer but I would appreciate any feedback thanks! (3,-2),(-1,-6)

*asked on February 23, 2009* -
## Chemistry

In alcohol fermentation, yeast converts glucose to ethanol and carbon dioxide C6H1206 -----> 2C2H5OH + 2CO2 If 5.97 g of clucose are reacted and 1.44 L of CO2 gas are collected at 293 K and .984 atm, what is the percent yield of the reaction?

*asked on October 31, 2007* -
## Science/Chemistry

Is this true Dispersion forces generally increase in strength as the number of electrons in a molecule increases. The number of electrons can only increase if more atoms are added to the molecule. The molecule has to stay electrically neutral. Dispersion

*asked on January 9, 2007* -
## Trigonometry

If the central angle is 4pi/3 radians, what should the radius of a circle be to make the arc length 1 m? a) 0.424 m b) 0.238 m c) 2.356 m d) 4.188 m I think it is c)... is that correct?

*asked on June 18, 2020* -
## chemistry

how much energy is required to convert 10g of ice at -15c into steam at 125c

*asked on October 30, 2019* -
## Calculus

The rate at which water flows into a tank, in gallons per hour, is given by a differentiable, increasing function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t (hours) 0 2 3 7 8 R(t) (gallons per hour)

*asked on May 10, 2018* -
## Maths

show that the circles x^2 + y^2 - 10x - 8y + 18 = 0 and x^2 + y^2 - 8x - 4y + 14 = 0 do not intersect. Please

*asked on May 2, 2017* -
## Physics

A gun is fired vertically into a 1.60 kg block of wood at rest directly above it. If the bullet has a mass of 21.0 g and a speed of 195 m/s, how high will the block rise into the air after the bullet becomes embedded in it?

*asked on January 20, 2016* -
## writing

in the topic sentence exercising three days a week will provide good physical health,what is the topic statement and what is the controlling sentence?

*asked on June 9, 2014* -
## Math

What is the solution to the inequality below? 12x > 6(x - 2)

*asked on January 15, 2014* -
## statistics

how can you reword these research hypotheses to null hypotheses: a. smoking during pregnancy increases the risk of a child being born prematurely. b. regular exercise in older adults decreases blood pressure levels.

*asked on July 5, 2012* -
## math statistics

create a null hypothesis on these research questions: a. what are the differences between emergency room shifts on medication errors? b. On a clinical trial of a new drug what will be the effects over a currently used drug?

*asked on July 5, 2012* -
## trig

solve equation for the exact solutions if possible put answer in degrees. 2tanx/3-tan^2x=1

*asked on May 30, 2012* -
## CHEMISTRY

DRAW LEWIS, KEKULE AND SKELETAL STRUCTURE OF: (CH3)2NCH2CH3

*asked on January 25, 2012* -
## Calculus

An isosceles triangle has a vertex at the origin. Determine the area of the largest such triangle that is bound by the function x^2 + 6y = 48. So, y=8 when x=0 making a vertical side equal to 8. I also determined that there is a zero at =/- the square root

*asked on March 20, 2010* -
## physics

1100g of ice at -50C is mixed with 100g of steam at 120C. Find out how much ice melts? The implied final temperature is 0C. Cice=0.5 Csteam=0.46 Hv=539 Hf =80 here is my work 1100(0.5)(0+50)+80m = 100(0.46)(120-0)+540(100) i am not getting the right answer

*asked on December 5, 2009* -
## physics

Consider this set of quantum numbers: n = 3, l = 2, ml = -1, ms = +½ The maximum number of electrons in an atom which can share the above set of quantum numbers is

*asked on August 15, 2009* -
## mathematics

A miniature portrait of George Washington is square and has an area of 169 square centimetres. How long is each side of the portrait? *

*asked on July 30, 2020* -
## Physics

A 3.0cm diameter crankshaft that is rotating at 2500 rpm comesto a halt in 1.5 s. a- what is the tangential acceleration of a ponit on thesurface? b-how many revolutions does the crankshaft make as itstops? For this question, what are the applicable

*asked on March 31, 2016* -
## Math - Ratio

A map scale is 1:10,000. Find the actual distance in centimetres represented on a map by 5cm. Convert your answer to metres and kilometres.

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

The Human Resources Department of Apex Manufacturing Company wants a report that shows its employees the benefits of saving for retirement. Produce a report that shows 12 predicted retirement account values for each employee—the values if the employee

*asked on August 5, 2014* -
## Chemistry

calculate the minimum number of grams of C3H8(g) that must be combusted to provide the energy necessary to convert 3.36 kg of H2O from its solid form at -10.0°C to its liquid form at 80.0°C

*asked on April 15, 2013* -
## chemistry

Greg reacts 5.0 moles of hydrochloric acid(HCL)with 1.5 moles of barium hydroxide(Ba(OH)2).Which reagent is the limiting reagent, and which is in excess?If the reagent runs to completion,how many moles of barium chloride(BaCl2)will be produced? CAN SOMEONE

*asked on February 18, 2013* -
## Physics

The solid fuel of a 300.kg rocket travelling at 1.64x104 km/h is ignited to correct the rocket trajectory in mid-flight to Mars. 10.00 kg of fuel is burnt in 15.00 s. If the exhaust velocity of the fuel, relative to the rocket, is 2.90x103 km/h, what is

*asked on October 26, 2012* -
## AP Physics

The initial kinetic energy imparted to a 0.72 kg bullet is 1777 J.The acceleration of gravity is 9.81 m/s2. Neglecting air resistance, find the range of this projectile when it is fired at an angle such that the range equals the maximum height attained.

*asked on February 26, 2011* -
## AP Physics

22. a)You are a pirate working for Dread Pirate Roberts. You are in charge of a cannon that exerts a force 20000 N on a cannon ball while the ball is in the barrel of the cannon. The length of the cannon barrel is 2.19 m and the cannon is aimed at a 32

*asked on February 26, 2011* -
## Personal Finance

The Lees, a family of two adults and two dependent children under age 16, had a gross annual income of $68,000 for 2007. Determine their standard deductions, exemption, and child tax credit amounts, as well as their marginal and average tax rates assuming

*asked on January 28, 2010* -
## chemistry

A sample of hydrogen gas was collected over water at 36°C and 855 mmHg. The volume of the container was 6.50 L. Calculate the number of moles of H2 collected. (Vapor pressure of water is 44.6 torr at 36°C)

*asked on August 15, 2009* -
## physics

An arrow with a mass of 0.12 kg is pulled back in a bow. After being held still, it is let go, moving at 23m/s after the 0.51meters in which the arrow is in contact with the bow string? What work was done on the arrow by th bow string? What force was

*asked on November 2, 2008* -
## Math

A licence plate starts with 3 letters. If possible letters are M, N, P, Q, R, S, T. How many different permutation of these letters can be made if no letter used more than once.

*asked on April 7, 2019* -
## math

One leg of a right triangle has a length of 15 m. The other sides have lengths that are consecutive integers. Find the number of meters in the perimeter.

*asked on October 22, 2018*