# shay

Popular questions and responses by shay-
## Chemistry

which sign of chemical reaction is not detectable by sight?

*asked on October 3, 2012* -
## Algebra

Graph the line whose x-intercept is -8 and whose y-intercept is -7

*asked on April 22, 2011* -
## Pre calculus

Find cos theta and cot theta if sin =1/4 and tan theta

*asked on September 8, 2019* -
## Physics

Please check my answers: The voltage across a 10-ohm resistor carrying 3 amps must be? I got 30 volts-v=?, I=3 amps, R= 16 ohm. v= 30 amps * 10 ohm=30 volts A 4-ohm resistor is connected in parallel with a 6 ohm resistor. What is the total resistance of

*asked on October 24, 2007* -
## chemistry

Radon-222 undergoes alpha decay.what is the nuclear equation

*asked on September 26, 2012* -
## Economics

The accompanying table shows a car manufacturer’s total cost of producing cars: Qty |TC| Variable Costs| Avg. Var. Costs| Avg. Total Costs| Avg. Fixed Costs 0 |$500,000| ---- | ---- | ---- |---- | 1 |540,000 | 2 |560,000 | 3 |570,000 | 4 |590,000 | 5

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

Write a rule in function notation to describe the transformation that is a reflection across the y-axis. A. Rx-0(X,Y) B. Ry-0(X,Y) C. Ry-x(X,Y) D. Rx--1(X,Y)

*asked on March 27, 2014* -
## algebra

P=b+2s Solve for s

*asked on April 21, 2011* -
## Technology

Which of the following is one way to assess whether or not a learning game is effective? A.Being able to win the game B.Doing the quiz before and after the game to see what you have learned.*** C.Making it difficult to win the game D.Simulating winning

*asked on March 6, 2019* -
## chemistry

What two conditions necessary for molecules to be polar? Her's my answer pls check. First, at least one covalent bond in the molecule has to be a polar covalent bond. For a bond to be polar, there must be a difference in the electronegativities of the two

*asked on October 5, 2012* -
## Algebra

The size of the beaver population at a national park increases at the rate of 5.1% per year. If the size of the current population is 151, find how many beavers there should be in 4 years. Use the function f(x)=151e^0.051t and round to the nearest whole

*asked on October 25, 2007* -
## Chemistry

A rectangular solid of unknown density is 6cm long, 3cm high, and 7cm wide. The mass of this solid is 250g. Calculate the density.

*asked on September 11, 2016* -
## everglades

Polygon ABCD is reflected and dilated to give polygon PQRS. The coordinates of the preimage are (2, 2), (6, 8), (12, 8), and (16, 2). The coordinates of the image are (11, 15), (9, 12), (6, 12), and (4, 15). What is the scale factor of the dilation? 0.25

*asked on April 15, 2015* -
## chemistry

is IBr a hydrogen bonding or dipole-dipole interactions or dispersion forces

*asked on September 28, 2012* -
## chemistry

Write the formulas of the compound NH4+ formed by specified cations with the following anions:OH-, NO3-, CO3-2,HSO4-, PO4-3 . Use the given order of anions

*asked on September 27, 2012* -
## Math

Each exterior angle of a regular polygon is 15 degrees. How many sides does the polygon have? and What is the sum of the interior angles? Since this is not my area of expertise, I searched Google under the key words "polygon angles" to get these possible

*asked on April 4, 2007* -
## Chemistry

At 700 k the equilibrium constant Kc for the reaction between NO(g) and O2(g) forming NO2(g) is 8.7*10^6. The rate constant for the reverse reaction at this temperature is 0.54 M^(-1)s^(-1). What is the value of the rate constant for the forward reaction

*asked on March 12, 2016* -
## physics

Car A is travelling at 22.0 m/s and car B at 29.0 m/s. Car A is 300 m behind Car B when the drive of car A accelerates his car with an acceleration of2.4 m/s2. How long does it take Car A to overtake Car B?

*asked on June 27, 2015* -
## language arts

The italicized words make up which type of verbal phrase? Turning the corner, Kate bumped into David. A. Split infinitive B. Gerund C. Infinitive D. Participial

*asked on December 23, 2013* -
## chemistry

If the boron nitride molecule,BN, were to form, what would its structure look like? pls. need help

*asked on September 28, 2012* -
## chemistry

Write the formulas of the compound Al+3 formed by specified cations with the following anions:OH-, NO3-, CO3-2,HSO4-, PO4-3 . Use the given order of anions

*asked on September 27, 2012* -
## math

A raffle has a $500 first prize, two $100 second prizes and five $25 third prizes. If 500 tickets are sold for $5 each find the expected value of buying a single ticket.

*asked on July 10, 2011* -
## Chem Electron Config

S2- Cu+ Sn2+ O2- A 1s22s22p63s23p63d10 B. 2s2 C. 1s22s22p63s23p4 D. 1s22s22p63s23p63d104s1 E. 1s2 F. 1s22s22p63s23p64s23d104p65s24d10 G. 1s22s22p63s23p64s23d104p64d105s25p2 H. 1s22s22p4 I. 1s22s22p6 J. none of the above Choose from the list the correct

*asked on October 18, 2012* -
## chemistry

Technetium-99m is an ideal radioisotope for scanning organs because it has a half-life of 6.0 {\rm hr} and is a pure gamma emitter. Suppose that 280{\rm mg} were prepared in the technetium generator this morning. How many milligrams would remain after the

*asked on September 26, 2012* -
## Math

Find how much money there will be in the account after the given number of years. Principle $8500 Rate 4% Coumpounded quarterly Time 4 yeats A=8500(1+.04/4)raised to 40th power A=8500(1.01)raised to 40th power I am stuck here, how do you raise to the 40th

*asked on August 27, 2011* -
## math

four diesel ships left a port at noon;january2,1953.the first ship returns to this port every 4 weeks, the second every 8, the third every 12,and the fourth every 16.when did all four ships meet again in the port?

*asked on December 4, 2008* -
## Math

A plane is flying with an airspeed of 190 miles per hour and heading 140°. The wind currents are running at 25 miles per hour at 165° clockwise from due north. Use vectors to find the true course and ground speed of the plane. (Round your answers to the

*asked on March 2, 2020* -
## english

what do i capitalized in this sentence.john grisham is the author of "the street lawyer".

*asked on April 23, 2013* -
## algebra

Write a rule for the pattern. -3,-9,-14,-47,-141,.....

*asked on December 16, 2012* -
## chemistry

What is the complete ionic equation for the double displacement reaction: CuNO3(aq) + K2S(aq)= what is the chemical name and formula of this chemical reaction? plsss. need help

*asked on October 3, 2012* -
## Chemistry

Would you expect a chemical change to be always accompanied by a physical change? Explain?

*asked on October 3, 2012* -
## chemistry

Reacting Mg with acid solution to form Mg salt and Hydrogen gas. What are the: 1.general reaction type 2. Chemical equation include phase 3. complete ionic equation include phase 4. chemical equation for the reaction between magnesium with water

*asked on October 3, 2012* -
## chemistry

For each of the following bonds, indicate the positive end with \delta^{+} and the negative end with \delta^{-}. Write an arrow to show the dipole for each. 1. Si-Cl 2. Se-F 3. Br-F 4. N-H 5. N-P

*asked on September 29, 2012* -
## physics

A tennis ball is thrown vertically upward with an initial velocity of +7.5 m/s. What will the ball’s velocity be when it returns to its starting point? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s How long will the ball take to

*asked on January 29, 2012* -
## physics

A ﬂowerpot falls from a window sill 25.3 m above the sidewalk. What is the velocity of the ﬂowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s 2 . Answer in units of m/s How much time does a passerby on the sidewalk below have

*asked on January 29, 2012* -
## English

which of the following is an example of a fragment? A) When Ted went to work, Bob went home. B) Although Ted went to work and Bob went home. C) Bob went to work although Ted went to work. D) Although Ted went to work, Bob went home. I Think the answer is

*asked on December 3, 2011* -
## physics

What is the kinetic energy of a 20 kg dog that is running at a speed of 7.3 m/s (about 16 mi/h)?

*asked on January 27, 2011* -
## Physics

When a pair of identical resistors is connected in series which of the following is the same for both resistors: voltage across each, power dissipated in each, current through each? What about if the resistors are different from each other?

*asked on April 15, 2008* -
## math

Operations with scientific notation Perform the indicated operation. Each final answer must be written in scientific notation. 1. (2.34*10^5)*(-4*10^-8) 2. (4*10^3)*(4.5*10^-3) 3. (5*10^5)*(4.3*10^2)

*asked on January 17, 2008* -
## Chemistry

The following solutions are combined in a calorimeter to determine the enthalpy of the neutralization reaction. 100.0 mL sodium hydroxide, NaOH, of unknown concentration an excess of 1.3732 M hydrochloric acid, HCl. The experimental value for q is

*asked on January 25, 2020* -
## Language arts

how does Squeaky feel about taking care of Raymond? A) She complains about it. B) It makes her feel important. C) She ignores him. D) She feels protective of him.***

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

Justin writes the letters I-L-L-I-N-O-I-S on cards and then places the cards in a hat. What is the probability of picking an N? 8/1 7/1 1/8 1/7

*asked on March 5, 2019* -
## math 107

Suppose you want to have $600,000 for retirement in 35 years. Your account earns 7% interest. a) How much would you need to deposit in the account each month? $ b) How much interest will you earn?

*asked on May 1, 2017* -
## math 107

You deposit $4000 each year into an account earning 6% interest compounded annually. How much will you have in the account in 30 years?

*asked on May 1, 2017* -
## Algebra

Can somebody please help me with solving this and show steps if they can. Solve the equation. Check for extraneous solutions. 9|9-8X|=2X+3 For my answer I got X=-1 I divided by 9 on both sides I got 8X=2X-6 Then I divided by 6 on both sides and got X=-1

*asked on November 16, 2016* -
## LA Check please

which is the best paraphrase of these lines from "January"? Fat Snowy Footsteps Track the floor, A)Thick, snowy footprints show where animals walked B)Thick, snowy outlines of feet mark the floor ****** C)Large snow boots lie on the floor of the house D)A

*asked on January 30, 2015* -
## algebra 2

Robert loves to dive . he joined the diving team . the diving board is feet above the water . if he jumps off the diving board as high as he can ( 10ft/s ) .how high above the water does he get ? and how long is he in mid air before he hits the water ?

*asked on January 27, 2015* -
## Chem

Suppose that you start with 1000000 atoms of a particular radioactive isotope. how many half-lives woruld be required to reduce the number of undecayed atoms to fewer than 1000?

*asked on October 20, 2014* -
## health

Mary Happens is an 82-year-old Hispanic patient who has been admitted to the hospital. She has Medicare and Medicaid. What demographic factors should be considered in providing this patient health care? What is the effect of culture on prevention and use

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

titration of a 50.00mL of KOH required 175.00mL of 0.0150M acetic acid, what is the Molarity of KOH solution

*asked on April 8, 2013* -
## Gen English

In the poem Dreams by Langston Hughes, Describe how the poem is structerd,or arranged in lines and stannnzas.

*asked on April 1, 2013* -
## pre- algebra 1

Solve the inequality. 42

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

How much in $ is one MOLE of pennies?

*asked on October 9, 2012* -
## chemistry

when two solutions are mixed and a new color is observed is this color change an indication that a chemical reaction has occurred? Explain why?

*asked on October 3, 2012* -
## chemistry

decomposition of water to form elemental Hydrogen and Oxygen gas. What will be the balanced chemical equation, type of reaction and the driving force of the reaction?

*asked on October 3, 2012* -
## chemistry

what is the gas formed when baking soda is added to vinegar? complete the reaction: NaHCO3(s) + CH3COOH(aq)

*asked on October 3, 2012* -
## chemistry

Is there a gas formed if you heat a sugar? What will be its identity

*asked on October 3, 2012* -
## chemistry

The half-life for the radioactive decay of calcium-47 is 4.5 days.If a sample has an activity of 4.00uCi after 13.5 days, what was the initial activity of the sample?

*asked on September 26, 2012* -
## chemistry

When californium-249 is bombarded by oxygen-18, a new isotope and four neutrons are produced. Express your answer as a nuclear equation.

*asked on September 26, 2012* -
## Physics

A person walks 13.9◦ north of east for 2.51 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk? How far due east would this person walk?

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

tracy had coffee once a day, and the special blend she bought at Donna's Coffee Stop cost about $3.00 a cup. Max bought coffee at Donna's coffee stop twice a day. He bought several different types of special blends that cost $.400 a cup on average 3. Tracy

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

Find the remainder when 13^18 + 19^12 is divided by 247.

*asked on August 2, 2012* -
## Math

Find the units digit in 23^7777 by looking for mod 10.

*asked on August 2, 2012* -
## English

Using the lists of possible answers, use the letters assigned to the characters/people to identify who would be the speaker of each of the following paraphrases/quotations: 1)I think we'll all be destroyed by the A-Bomb,so why should I care about anything?

*asked on December 3, 2011* -
## English

Which of these is the properly punctuated sentence? a)Ted went to work and Bob went home. b)Ted went to work; and Bob went home. c)Ted went to work. And Bob went home d)Ted went to work, and Bob went home. Would the correct answer be D?

*asked on December 3, 2011* -
## English

Which of the following is correct? a) We were supposed to go to the game today, but it rained. b)We were suppose to go to the game today, but it rained.

*asked on December 3, 2011* -
## English

Which of the following is correct? a)Who's toothbrush is floating in the toilet? b)Whose going to Dairy Queen with me? c)Whose jacket is that? d)b&c I believe the answer is C

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

completely factor the following expression. 16a^2-40ab+25b^2

*asked on July 26, 2011* -
## intermediate algebra

factor completely. Remember to look first for a common factor. If a polynomial is prime, state this. -4t^2+64 -(4t^2-64 =((2t)^2-8^2) (a^2-b^2)=(a+b)(a-b)

*asked on July 25, 2011* -
## algebra

Essay. Show all work. the rectangular swimming pool is given by 2x^2-5x-3 ft.^2. One side length of the pool is given by 2x+1 feet. What is an algebraic expression for the other side length of the pool? Simplify this, and include correct units as part of

*asked on July 19, 2011* -
## Algebra II

Solve the problem. The profit made when t units are sold, t>, is given by P²-36t+320. Determine the number of units to be sold in order for P>0 (a profit is made).

*asked on July 7, 2011* -
## Algebra

The length of a rectangle is three times its width. If the area of the rectangle is 300cm, find its perimeter.

*asked on April 21, 2011* -
## geometry

This is a two-column proof requiring 6 answers for each column. Given: line AB is perpendicular to line CD. Prove: m angle 2 + m angle 4 + m angle 7 = m angle 1.

*asked on September 1, 2010* -
## Business Law

* What is the difference between lobbying and bribery? * What argument could the SLOC members make that the payments made do not fit the definition of an illegal bribe (under the FCPA)? * What do you think is the appropriate punishment for the violation of

*asked on July 23, 2010* -
## business

as dr. andrea mogan listens to allison sanchez describe her ailments, she jots down her insights and treatment ideas. a health records specialist will later enter these _______ into allison's electronic medical record a. diagnostic reports b. medication

*asked on February 15, 2010* -
## Math 213 Elementary Math

Use the definition of less than to show each of the following: a. 2 < 4 b. 3 < 100 c. 0 < 3

*asked on August 5, 2009* -
## can someone please help me?

simplify the following expressions involving complex numbers. (3+2i)-(-7-i) 10 + 3i how did you do that? can you show me this one and explain how this time? (3+2i)(-7-i) or even (3-2i)^2 you would do 3+2i=5i, then -7-i=7i then 5i+7i=12i (3+2i)-(-7-i) =

*asked on January 18, 2007* -
## algerbra

mrs. johnson is 3 times as old as her son. ten years agoe she was 5 times as old as her son was then. what is the two equations for this problem? let x = son's age and y = Mrs. Johnson's age. ============================ y=3x is one equation. 10 years ago

*asked on December 4, 2006* -
## Calculus

Hello. I would appreciate it if someone could check my answers. I'm sorry it is so long. 1.) Let R denote the region between the curves y=x^-1 and y=x^-2 over the interval 1

*asked on September 3, 2005* -
## Chemistry

What are the values of q, w, ΔU, ΔH, ΔS, ΔSsurr, and ΔSuniv for the following constant pressure process for a system containing 0.956 moles of CH3OH ? CH3OH(g, 122.0 ºC, 1.00 atm) ⟶ CH3OH(l, 34.0 ºC, 1.00 atm) Assume that CH3OH(g) behaves as an

*asked on February 2, 2020* -
## chemistry

One mole of O2(g) undergoes the following change in state. O2(g, 299 K, 4.38 bar) ⟶ O2(g, 252 K, 6.79 bar) What is ΔS for the gas? Assume ideal gas behaviour. The constant pressure molar heat capacity for O2(g) is Cp,m = 29.10 J K−1 mol−1.

*asked on February 2, 2020* -
## chemistry

A sample of gas is compressed from 12.93 L to 3.83 L using a constant external pressure of 4.89 atm. At the same time, 1,957 J of heat flows into the surroundings. What is the internal energy change for the gas?

*asked on February 1, 2020* -
## chemistry

What is w when 3.93 kg of H2O(l), initially at 25.0 ºC, is converted into water vapour at 157 ºC against a constant external pressure of 1.00 atm? Assume that the vapour behaves ideally and that the density of liquid water is 1.00 g/mL.

*asked on February 1, 2020* -
## Chemistry

Consider the neutralization between the following two solutions: 100.0 mL 0.9285 M hydrochloric acid, HCl 150.0 mL 1.8269 M sodium hydroxide, NaOH How many moles of water are produced by this neutralization?

*asked on January 25, 2020* -
## Social studies

What were some influences on self-government? Select all that apply. ~Commentaries on the laws of England ~ The Columbian bill of rights ~English bill of rights ~ Poor Richards almanac

*asked on September 4, 2019* -
## Physics

A state trooper’s car sends out a radar signal at a frequency of 14 GHz. Find the wavelength of this signal. The wave speed is 2.998 × 108 m/s. Answer in units of m

*asked on April 14, 2019* -
## statistics

a line of regression y =-1.240 +7.07x is the best fit line for a set of data comparing airfare with 30 days notice and one-day notice. find the best-predicted cost of a ticket purchased one day in advance given that the cost of the ticket is $300 if

*asked on March 15, 2019* -
## English

Why does Squeaky not know at first who has won the race in "Raymonds Run"? A. Raymond has climbed a fence*** B. The may pole gets in the way C. The finish is very close D. Mr. Person speaks to softly

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

find the volume of the cylinder. use 3.14 for pi the top is 34 and the bottom is 27

*asked on February 21, 2019* -
## math

Sara needs to cover the top and sides of the cylinder below. 8 12 about how many square inches of paper will Sara need? 352 402 804 1005

*asked on February 21, 2019* -
## Managerial finance

Your company contemplates buying a computer based inventory management system for 200 000. It will depreciated on a straight line basis to zero over its 4 year life span, when it will be sold for 30 000. the system will save the firm 60 000 pre-tax (EBIT)

*asked on August 7, 2018* -
## math

your cellphone plan costs $24.99 per month plus $0.11 for each text message you send or receive. you have at most $28 to spend on your cellphone bill. what is the maximum number of text messages that you can send or receive next month

*asked on February 27, 2017* -
## Maths

There are Number cards ”3”、”4”、”5” with 10 cards each ，choose any 8 cards to sum up to 31,then what is the maximum number of cards “3” in the combination?

*asked on November 11, 2016* -
## 3rd grade Math

Allie was making a cookie recipe that called for 30 chocolate chips. She wants to make 2 batches of cookies. How many chocolate chips does she need? 1 group = 30 30+30=60 or 2x30=60 ?

*asked on October 30, 2016* -
## Algebra

If x pounds of cashews valued at $6.00 per pound are to be mixed with y pounds of peanuts valued at $4.00 per pound to obtain a 40 pound cashew-peanut mixture. Find x and y so that when the mix is sold for $4.75 per pound, the same amount of revenue is

*asked on October 13, 2016* -
## Organic chemistry

An unknown compound (x) melts at 60°C and is mixed with a compound (y) that melts at 45°C and is soluble in x. Will the Melting point for the mixture start below 45°? I think so, because if you look at ice and salt for an example, salt has a way higher

*asked on September 21, 2016* -
## pysical science

An automobile with a mass of 1258 kg accelerates at a rate of 5 m/s² in the forward direction. What is the net force acting on the automobile?

*asked on May 11, 2016* -
## math

Dan has walked 1/3 of the way to school. What fraction describes how far he still has to go? Is it 1/4,1/2,2/3,3/1

*asked on March 8, 2016* -
## Math

Ms. Williams has 3 liters of lemonade. She wants to divide the lemonade into eight portions to give her 8 grandchildren. How can she divide the lemonade into eight equal portions

*asked on December 15, 2015* -
## math

You are buying balloons for a pary. A small balloon cost $2. A large balloon cost $5. Write an algebraic expression for the cost of x small balloons and y large balloons. What is the answer?

*asked on November 2, 2015*