# Randy

Popular questions and responses by Randy-
## Math

sec 7pi/4 without a calculator Find the exact answer

*asked on November 7, 2014* -
## Chemistry

A selenium atom (Se) would form its most stable ion by the 1. loss of 2 electrons. 2. gain of 1 electron. 3. loss of 1 electron. 4. loss of 7 electrons. 5. gain of 2 electrons. Help please and tell me how you got the answer. Thanks!

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

A box contains five numbered balls (1,2,2,3 and 4). We will randomly select two balls from the box (without replacement). (a) The outcome of interest is the number on each of the two balls we select. List the complete sample space of outcomes. (b) What is

*asked on March 12, 2013* -
## math

the absolute value of an integer is always greater than the integer. True or False?

*asked on January 27, 2012* -
## Physics

Two horizontal forces, F1-> and F2-> , are acting on a box, but only F1->is shown in the drawing. F2-> can point either to the right or to the left. The box moves only along the x axis. There is no friction between the box and the surface. Suppose that

*asked on February 13, 2013* -
## ALGEBRA

What are the odds in favor of drawing face card from an ordinary deck of cards? to

*asked on May 23, 2012* -
## ALGEBRA

The product of two consecutive positive even numbers is 528. What are the numbers? (Enter solutions from smallest to largest.) and

*asked on April 25, 2012* -
## geometry

The altitude of an equilateral triangle is 7 square root 3 units long. The length of one side of the triangle is ____ units. 7 14 14 square root 3 7 square root 3 over 2

*asked on January 17, 2012* -
## chemistry

Isotonic saline is 0.89% NaCl (w/v). Suppose you wanted to make 1.0 L of isotonic solution of NH4Cl. What mass of NH4Cl would you need? Question 23 options: 1.6 g 8.1 g 8.9 g 54 g

*asked on October 30, 2014* -
## Trig / Calc

What angle (in degrees) corresponds to 18.96 rotations around the unit circle? Enter the exact decimal answer.

*asked on October 23, 2014* -
## geometry

Ray OX bisects angle AOC and angle AOX =42 degrees, angle AOC is: 42 degrees 84 degrees 21 degrees 68 degrees

*asked on January 17, 2012* -
## Chemistry

What is the percent by mass of C in methyl acetate (C3H6O2)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of %. Please work it out for me so I totally understand it. Thanks!

*asked on December 6, 2009* -
## Word Problem

Assume that the mathematical model C(x) = 16x + 130 represents the cost C, in hundreds of dollars, for a certain manufacturer to produce x items. How many items x can be manufactured while keeping costs between $525,000 and $781,000? Thanks in advance!

*asked on February 18, 2009* -
## Statistics/Probability

So I tried solving the first one and apparently failed miserably, attempted both twice and got it wrong each time and I have one submission attempt left, so any help is definitely appreciated! 1. Hotels R Us has kept the following recordes concerning the

*asked on May 21, 2014* -
## physics

A golfer hits a shot to a green that is elevated 3.0 m above the point where the ball is struck. The ball leaves the club at a speed of 16.8 m/s at an angle of 30.0¢ª above the horizontal. It rises to its maximum height and then falls down to the green.

*asked on October 6, 2011* -
## Physics

To move a large crate across a rough floor, you push on it with a force at an angle of 21 below the horizontal, as shown in the figure. Find the acceleration of the crate if the applied force is 400 , the mass of the crate is 32 and the coefficient of

*asked on March 6, 2011* -
## chemistry

The solubility of Na3(PO4) is 0.025 M. What is the Ksp of sodium phosphate?

*asked on November 11, 2015* -
## math

order the numbers from least to greatest. _ 1 4/5, 1.78, 1 5/6, 7/4, 1.7, 1 8/11 I am confused on going back and forth between decimals and fractions.

*asked on September 11, 2014* -
## Chemistry

Help with lab report Need Help finishing my lab report.KNOWN VALUES ARE V OF HCL=50ML,M=2.188.V OF NAOH=55.3ML,M=2.088.INTIAL TEMP FOR HCL=22.5C,NAOH IS 23C.this is for part A: Mass of final NACL solution assuming that the density of a 1 M Nacl solution is

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

How do frequency tables, relative frequencies, and histograms showing relative frequencies help us understand sampling distributions? A. They help us to measure or estimate of the likelihood of a certain statistic falling within the class bounds. B. They

*asked on September 26, 2010* -
## physics

consider a pair of planets that find the distance between them is decreased by a factoer of 5. Show that the force between them becomes 25 times as strong?

*asked on November 14, 2008* -
## Chemistry

What mass of oxygen is consumed when 1.73L of carbon dioxide (STP) are produced in the following equation. C4H8 + 6 O2 > 4 CO2 + 4 H2O please help and show your work. My answer for this problem is 11.12g/O2. I have no confidence in my answer.

*asked on April 16, 2012* -
## Chemistry

What volume of carbon monoxide gas (at STP) is needed when 1.35 Moles of oxygen gas react completely in the following equation. 2CO + O2 > 2CO2 please show your work I'm having trouble with Gas Stoichiometry.

*asked on April 16, 2012* -
## ALGEBRA

Select all statements that are true. (log_b\(A\))/(log_b\(B\))=log_b\(A-B\) (If ) log_1.5\(8\)=x, text( then ) x**(1.5) =8. log\(500\) text( is the exponent on ) 10 text( that gives ) 500. text (In )log_b\(N\), text( the exponent is )N. text( If )

*asked on April 16, 2012* -
## math

Ray OX bisects angle AOC and angle AOX =42 degrees, angle AOC is: 42 degrees 84 degrees 21 degrees 68 degrees

*asked on January 16, 2012* -
## statistics

A USU today survey found that of the gun owners surveyed 275 favor stricter gun laws. Test the claim that the majority (more than 50%) of gun owners favor stricter gun laws. Use a .05 significance level.

*asked on December 7, 2010* -
## chemistry

How many moles of Cu are needed to react with 3.50 moles of AgNO3?

*asked on October 30, 2010* -
## Geometry

How do you find the coordinates of the image of J (-7,-3) after the translation (x,y) (x-4,y+6)

*asked on September 14, 2015* -
## Pre-Calculous (Trig)

The Singapore Flyer, currently the world's largest Ferris wheel, completes one rotation every 37 minutes.1 Measuring 150 m in diameter, the Flyer is set atop a terminal building, with a total height of 165 m from the ground to the top of the wheel. When

*asked on October 17, 2014* -
## chemistry

While in Europe, if you drive 105km per day, how much money would you spend on gas in one week if gas costs 1.10 euros per liter and your car's gas mileage is 22.0mi/gal? Assume that 1euro = 1.26 dollars.

*asked on September 8, 2013* -
## Math

Search Results for "Ruth has some money in a savings account. after the bank adds 5% interest to her account , she has $126. How much was in her account before the interest was added" How do i write this in an equation?

*asked on September 3, 2013* -
## ALGEBRA

Solve the equations. ((a) ) (2 L)/(5) = 2 L = ((b) ) 4 = (4 M)/4 + 8 M =

*asked on April 16, 2012* -
## ALGEBRA

(a) Write the expression in terms of natural logarithms. (Express all logarithmic functions in terms of ln(x) in your answer.) log_(8.5) \(127\) = Give a calculator approximation (correct to four decimal places). log_(8.5) \(127\) ~=

*asked on April 16, 2012* -
## ALGEBRA

Solve the equations by finding the exact solution. (a) 1 = x - 1 (B)

*asked on April 16, 2012* -
## ALGEBRA

Solve the equation. 2(W + 4) - 3(W + 2) = 0

*asked on April 11, 2012* -
## Biology

the biome with the fewest seasonal changes is?

*asked on October 29, 2011* -
## chemistry

When I am writing a half-reaction with a corroding metal that is in Deaerated water, what can i assume there to be in the water that can show up in a half-reaction?

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

When I am writing a half-reaction with a corroding metal that is in deionized water, what can i assume there to be in the water that can show up in a half-reaction?

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

A log is floating on swiftly moving water. A stone is dropped from rest from a 84-m-high bridge and lands on the log as it passes under the bridge. If the log moves with a constant speed of 3.6 m/s, what is the horizontal distance between the log and the

*asked on September 8, 2010* -
## college

what is ADE/CLR?

*asked on January 20, 2010* -
## English

I have to write an essay for Heart of Darkness by Joseph Conrad. The question says in some works of literature a character who appears brifely or doesn't appear at all is a significant presence. Show how such a character functions in the work. You may wish

*asked on November 14, 2006* -
## math

What is (f+g)(x)? f(x)=x^2−36 g(x)=x^3+2x^2−10

*asked on April 9, 2018* -
## Physics! NEED HELP!

A 40 kg girl runs up a flight of stairs that is 34 m high. How much work does this require?

*asked on October 19, 2017* -
## chemistry

What is the pH of a buffer solution that has CH3CO2H=0.68 M and CH3CO2- =0.58 M, and has 0.01 M concentration of H2SO4 added to it? Ka of acetic acid is 1.8x10-5

*asked on November 11, 2015* -
## chemistry

What is the pH of a 0.5 M solution of NaHCO3? Kb = 2.4x10-8 (base)

*asked on November 11, 2015* -
## Math Trig

A kite flier wondered how high her kite was flying. She used a protractor to measure an angle of 40 degrees from level ground to the kite string. If she used a full 120-yard spool of string, how high, in feet, was the kite? (Disregard the string sag and

*asked on October 24, 2014* -
## SAVE ME ( MATH)

function p(t) has a domain of 1 less than or equal to t less than or equal to 12 range of -40 < p less than or equal to 160 Find the domain and range for. Enter the exact answers A) P(1/4t+4) B) -1/10p(2t)+46

*asked on October 17, 2014* -
## statistics

You can answer any questions from the questions on an exam. In how many different ways can you choose the questions, assuming that the order in which you choose the questions is irrelevant?

*asked on August 6, 2014* -
## Statistics/Probability

So I tried solving the first one and apparently failed miserably, attempted both twice and got it wrong each time and I have one submission attempt left, so any help is definitely appreciated! 1. Hotels R Us has kept the following recordes concerning the

*asked on May 20, 2014* -
## math

Trail mix is sold in 1-pound bags. Mary will buy some trail mix and re-package it so that each of the 15 members of her hiking club gets one 25_ -pound bag. How many 1-pound bags of trail mix should Mary buy to have enough trail mix without leftovers?

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

The conversion factor relating miles to meters is 1 mile= 1610m The speed of light is 3.00×10^8 m/s. How fast is this in miles per hour (miles/h \rm miles/h)?

*asked on September 8, 2013* -
## Statistics

*Give all probabilities to two decimal places. Three daily newspapers are published in a large city. Suppose we have the following facts about the people in the city: 60% read Newspaper A. 34% read Newspaper C. 72% read Newspaper A or Newspaper B. 18% read

*asked on March 12, 2013* -
## Physics

A small lead ball, attached to a 1.50-m rope, is being whirled in a circle that lies in the vertical plane. The ball is whirled at a constant rate of three revolutions per second and is released on the upward part of the circular motion when it is 0.75 m

*asked on February 26, 2013* -
## math

a car weighing 15000N rounds a curve of 60m. radius banked at angle of 30 degrees.find the frictional force acting on the tires when the car is travelling at 100kph.The coefficient of friction between the tires and the road is 0.90.

*asked on February 23, 2013* -
## Physics

A space probe has two engines. Each generates the same amount of force when fired, and the directions of these forces can be independently adjusted. When the engines are fired simultaneously and each applies its force in the same direction, the probe,

*asked on February 13, 2013* -
## Science

Nathaniel is driving his sports car down a four lane highway at 40m/s. He comes up behind a slow moving dumptruck and decides to pass it in the left hand lane. If Nathaniel can accelerate at 5m/s^2, how long will it take for him to reach the speed of

*asked on January 14, 2013* -
## Algebra

- There are less than 40 members of the Landowners Association. These memebers vote on various proposals. All the members were present at a meeting and all voted on each of two proposals. On the first proposal 4 times as many memebers voted yes to those

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

evaluate the following expression _(5)P_0=

*asked on August 28, 2012* -
## Homework test

An artifact was found and tested for its carbon-14 content. If 70% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

*asked on June 17, 2012* -
## math

A pie plate has a diameter of 22 cm. How much counter space is needed to display 8 pies?

*asked on June 15, 2012* -
## ALGEBRA

Make a 5% offer on a Volkswagen New Beetle that has a sticker price of $22,120 and a dealer cost of $20,862. (Round your answer to the nearest dollar.)

*asked on May 6, 2012* -
## chemistry

how many grams of NaOH would be needed to make 896mL of a 139 M solution

*asked on April 30, 2012* -
## chemistry

calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)

*asked on April 29, 2012* -
## chemistry

calculate the molarity of an acetic acid solution if 39.96 mL of the solution is needed to neutralize 136mL of 1.41 M sodium hydroxide. the equation for the reaction is HC2H3O2(aq) + NaOH(aq) > Na+(aq) + C2H3O2(aq) +H2O(aq)

*asked on April 29, 2012* -
## Chemistry

the heat of fusion water is 335J/g,the heat of vaporization of water is 2.26kJ/g, the specific heat of water is 4.184J/deg/g. how many grams of ice at 0 degrees could be converted to steam at 100 degrees C by 9,574J

*asked on April 27, 2012* -
## ALGEBRA

Graph the equation. x = -6

*asked on April 25, 2012* -
## ALGEBRA

Use the definition of logarithm to simplify each expression. text((a) )log_(3b) \(3b\) text((b) )log_(4b) \((4b)^6\) text((c) )log_(7b) \((7b)^(-11)\)

*asked on April 25, 2012* -
## chemistry

the heat of fusion water is335 J/g. The heat of evaporization of water is 2.26 kJ/g, the specific heat of ice is 2.05 J/Deg/g, the specific heat of steam is 2.08 J/deg/g and the specific heat of liquid water is 4.184 J/deg/g. How much heat would be needed

*asked on April 24, 2012* -
## chemistry

the heat of vaporization of water is 2.26kJ/g. how much heat is needed to change 2.55 g of water to steam?

*asked on April 20, 2012* -
## Chemistry

what volume of ammonia gas will be produced when 8.01 L of hydrogen react completely in the following equation. N2 + 3H2 > 2NH3 this stuff is so confusing because one little word seems to change the entire process for solving.

*asked on April 17, 2012* -
## Chemistry

what volume of ammonia gas will be produced when 1.26L of nitrogen react completely in the following equation? N2 + 3H2 > 2NH3 Please if someone can just give me the order of operation it will be much appreciated because chemistry is just not my forte.

*asked on April 16, 2012* -
## ALGEBRA

3x2 = 17x + 6

*asked on April 16, 2012* -
## ALGEBRA

Consider the following expression. 3(x - 2) - 9(x**2 + 7 x + 4) - 5(x + 8) (a) Simplify the expression.

*asked on April 16, 2012* -
## ALGEBRA

The Greek God Zeus ordered his blacksmith Hephaestus to create a perpetual water-making machine to fill Zeus' mighty chalice. The volume of Zeus' chalice was reported to hold about one hundred and fifty sextillion gallons (that is a fifteen followed by

*asked on April 16, 2012* -
## ALGEBRA

Evaluate the given expressions (to two decimal places). (a) ) log((23.0) (b) ) log_(2) \(128\) (c) ) log_(9) \(1\)

*asked on April 16, 2012* -
## ALGEBRA

Use the definition of logarithm to simplify each expression. (a) )log_(3b) \(3b\) ((b) )log_(8b) \((8b)^6\) (c) )log_(10b) \((10b)^(-13)\)

*asked on April 16, 2012* -
## ALGEBRA

Evaluate the given expressions (to two decimal places). (a) log((23.0) ((b) log_(2) \(128\) text((c) ) log_(9) \(1\)

*asked on April 16, 2012* -
## ALGEBRA

Find a simplified value for x by inspection. Do not use a calculator. (a) log5(25) = x (b) log2(16) = x

*asked on April 16, 2012* -
## ALGEBRA

Contract the expressions. That is, use the properties of logarithms to write each expression as a single logarithm with a coefficient of 1. text ((a) ) ln\(3\)-2ln\(4\)+ln\(8\) ((b) ln\(3\)-2ln\(4+8\) (c) )ln\(3\)-2(ln\(4\)+ln\(8\))

*asked on April 16, 2012* -
## ALGEBRA

Solve the equations by finding the exact solution. ln\(x\) - ln\(9\) = 3

*asked on April 16, 2012* -
## ALGEBRA

ln\(e\) = ln\( sqrt(2)/x \) -ln\(e\)

*asked on April 16, 2012* -
## ALGEBRA

(1)/(2) log\(x\) - log\(10000\) = 4

*asked on April 16, 2012* -
## ALGEBRA

Solve the equations by finding the exact solution. ln\(x\) - ln\(9\) = 3

*asked on April 16, 2012* -
## ALGEBRA

A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.4 multiplied by 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

*asked on April 16, 2012* -
## ALGEBRA

Find the number of decibels for the power of the sound. Round to the nearest decibel. A rock concert, 5.21 multiplied by 10-6 watts/cm2

*asked on April 16, 2012* -
## Algebra II

if y varies directly as x, if y=80 when x=32, find x if y=100

*asked on March 22, 2012* -
## geometry

The altitude of an equilateral triangle is 7 square root 3 units long. The length of one side of the triangle is ____ units. 7 14 14 square root 3 7 square root 3 over 2

*asked on January 16, 2012* -
## math

1. find the lateral area of a right prism whose altitude measures 20 cm and whose base is a square with a width 7 cm long. 2. the volume of a rectangular solid is 5376 cubic meters, and the base is 24 meters by 16 meters. find the height of the solid. 3. a

*asked on January 7, 2012* -
## physics

A jetliner can fly 5.57 hours on a full load of fuel. Without any wind it flies at a speed of 2.43 x 102 m/s. The plane is to make a round-trip by heading due west for a certain distance, turning around, and then heading due east for the return trip.

*asked on October 6, 2011* -
## physics

Relative to the ground, a car has a velocity of 14.4 m/s, directed due north. Relative to this car, a truck has a velocity of 24.8 m/s, directed 52.0° north of east. What is the magnitude of the truck's velocity relative to the ground?

*asked on October 6, 2011* -
## physics

A ball is thrown upward at a speed v0 at an angle of 59.0¢ª above the horizontal. It reaches a maximum height of 8.7 m. How high would this ball go if it were thrown straight upward at speed v0?

*asked on October 6, 2011* -
## physics

A speedboat starts from rest and accelerates at +1.68 m/s2 for 5.43 s. At the end of this time, the boat continues for an additional 8.16 s with an acceleration of +0.475 m/s2. Following this, the boat accelerates at -0.866 m/s2 for 7.54 s. (a) What is the

*asked on October 3, 2011* -
## algebra

what is the slope of line that passes through (-3,-8) and (0,6)

*asked on May 25, 2011* -
## physics

Driving in your car with a constant speed of 12 m/s, you encounter a bump in the road that has a circular cross-section. If the radius of curvature of the bump is 35 m, find the apparent weight of a 63-kg person in your car as you pass over the top of the

*asked on March 6, 2011* -
## Math

What is the surface area of a right circular cylinder with base circle of radius of 5m and height of the cylinder 10m?

*asked on January 18, 2011* -
## statistics

Find z such that 20.3% of the standard normal curve lies to the right of z. 0.831 0.533 -0.533 -0.257 0.257

*asked on September 26, 2010* -
## 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 September 26, 2010* -
## economics

Explain how absolute advantage and comparative advantage differ?

*asked on July 30, 2010* -
## Pre-cal

Please determine the following limit if they exist. If the limit doe not exist put DNE. lim 2x^3 / x^2 + 10x - 12 x->infinity. Thanks.

*asked on May 10, 2010* -
## geometry

If a rectangle has an area of 64 square units and a length of 16 units, what is its width? If necessary, round your answer to two decimal places.

*asked on February 25, 2010*