# Sally

Popular questions and responses by Sally-
## Chemistry

Hi. Is PO4(3-) polar or non-polar? Why or why not? Thanks! Look up the electronegativity of P and O. I think I remember that O is about 3.5 and P is about 2.1; therefore, each P-O bond is somewhat polar. Thus, the ion will be polar unless the Lewis

*asked on November 23, 2006* -
## Chemistry

A solution contains 0.022 M Ag and 0.033 M Pb2 . If you add Cl–, AgCl and PbCl2 will begin to precipitate. What is the concentration of Cl– required, in molarity, when A. AgCl precipitation begins? B. AgCl precipitation is 99.99% complete? C. PbCl2

*asked on April 21, 2013* -
## Chemistry

A buffer consisting of H2PO4- and HPO42-, helps control the pH of physiological fluids. Many carbonated soft drinks also use this buffer system. You were asked to prepare this buffer from K2HPO4 and KH2PO4. Identify the week acid and base components of

*asked on July 3, 2020* -
## Algebra

Create a system of equations that includes one linear equation and one quadratic equation. Part 1. Show all work to solving your system of equations algebraically. Part 2. Graph your system of equations, and show the solution graphically to verify your

*asked on June 9, 2016* -
## Trig

Find sin(s+t) and (s-t) if cos(s)= 1/5 and sin(t) = 3/5 and s and t are in quadrant 1. =Sin(s)cos(t) + Cos(s)Sin(t) =Sin(1/5)Cos(3/5) + Cos(-1/5)Sin(3/5) = 0.389418 Sin(s-t) =sin(s)cos(t) - cos(s)sin(t) =sin(-3/5)cos(1/5) - cos(1/5)sin(3/5) =Sin-3/5

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

If the average of five consecutive whole numbers is 18, what is the smallest number?

*asked on October 26, 2018* -
## math

BOOKS A library contains 2000 books. There are 3 times as many non-fiction books as fiction books. Write and solve a system of equations to determine the number of non-fiction and fiction books.

*asked on April 4, 2016* -
## Math

You want to have 1.5 million in real dollars in an account when you retire in 40 yeras. the nominal return on your investment is 11 percent and the inflation rate is 3.8 percent. What real amount must you deposit each year to achieve your goal? My answer

*asked on February 29, 2012* -
## Economics

you are hired as the consultant to a monopolistically competitive firm. The firm reports the following information about its price, marginal cost, and average total cost. Can the firm possibly be maximizing profit? If the firm is profit maximizing, is the

*asked on December 5, 2006* -
## college physics help please...

The location of the center of mass of the partially eaten, 11 inch diameter pizza (r = 5.5) shown in Figure 9-20 is Xcm = -1.1 in. and Ycm = -1.1 in. Assuming each quadrant of the pizza to be the same, find the center of mass of the uneaten pizza above the

*asked on October 19, 2008* -
## organic chemistry

Which one is chiral? 1,1-Dibromopropane 1,2-Dibromopropane 1,3-Dibromopropane 2,2-Dibromopropane 2-Bromo-2-chloropropane

*asked on July 24, 2008* -
## physics

Three charged marbles are glued to a nonconducting surface and are placed in the diagram as shown. The charges of each marble are q1 = 5.75 µC, q2 = 1.48 µC, and q3 = −2.47 µC. Marble q1 is a distance r1 = 3.00 cm to the left of the marble q2, while

*asked on February 13, 2015* -
## SSAT

A small cube has a length of 2 inches. How many small cubes are needed to make a larger cube whose base has a perimeter of 32 inches?

*asked on October 26, 2018* -
## Probability & Stats

The probability that Pete will catch fish on a particular day when he goes fishing is 0.8. Pete is going fishing 3 days next week. 1. The probability that Pete will catch fish on exactly one day is: a. .008 b. .096 c. .104 d. .8 Please show work

*asked on November 2, 2016* -
## accounting

Logan Products computes its predetermined overhead rate annually on the basis of direct labor-hours. At the beginning of the year, it estimated that 38,000 direct labor-hours would be required for the period’s estimated level of production. The company

*asked on September 8, 2012* -
## Chemistry

2. 12.5 ml of 0.280M HNO3 and 5.0mL of 0.920M KOH are mixed. To make the resulting solution neutral, which of the following should be added? -1.1 mol HCl -1.69 mL of 0.650M HBr -0.55 mmol Mg(OH)2 -2.2mL of 0.50M LiOH -none of the above; already neutral

*asked on January 28, 2011* -
## math

A pile of 108 identical books has a mass of 30 kg. Find (a)the mass of 150 books and (b)the number of books that has a mass of 20 kg.

*asked on August 2, 2011* -
## Algebra2

Does the relation in the table represent direct variation inverse variation or neither? If it is a direct or inverse variation, write an equation to represent the relation. (x,y) (5,2) (10,1) (15,2/3) (20,1/2)

*asked on October 17, 2016* -
## Walk Two Moons

Has anyone read the story walk two moons? If so, please help. where does Sal BEGIN to realize that her mother is really not returning? A) Lake Michigan B) Madison Wisconsin C) Pipestone Minnesota *** D) Sioux Falls, South Dakota please help, I've read the

*asked on May 14, 2016* -
## algebra

Solve the formula for the variable given. P = r-c/n solve for c. (business) I have worked this problem so many times I'm getting confused. please help. Thanking you in advance

*asked on March 1, 2013* -
## chemistry

3. Use the mole ratio of CuO produced per mole of malachite to write a balanced equation for the malachite decomposition reaction. Assume that CO₂ is also a product of the decomposition. CuCo3*Cu9OH)2 -----> 2Cuo+Co2+H2O 0.004522431 moles of malachite

*asked on May 3, 2010* -
## Chemistry

Rank the ions in order of decreasing size. Sr2+, Ba2+, Cs Cs>Ba>Sr

*asked on November 9, 2007* -
## Statistics

A machine fills 12 ounce bottles with soda. For the machine to function properly, the standard deviation of the sample must be less than or equal to 0.02 ounce. A sample of 8 bottles is selected, and the number of ounces of soda in each bottle is given. At

*asked on December 6, 2015* -
## physics 6a

A potential difference of 4.75 kV is established between parallel plates in airf the air becomes ionized (and hence electrically conducting) when the electric field exceeds 3.00×106 V/m, what is the minimum separation the plates can have without ionizing

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

In a thundercloud there may be an electric charge of 46 C near the top of the cloud and −46 C near the bottom of the cloud. If these charges are separated by about 6 km, what is the magnitude of the electric force between these two sets of charges? The

*asked on January 28, 2016* -
## Math

During its first week of business, a market sold a total of 108 apples and oranges. The second week, five times the number of apples and three times the number of oranges were sold. A total of 452 apples and oranges were sold during the second week.

*asked on December 18, 2015* -
## SIG FIGS

How many significant figures does 22.0, 0.22, 22. , 0.022? Im just confused as to the decimal addition to numbers and what the sig figs will be for them. If you don't mind can you please state some rules for sig figs that are helpful and some confusing

*asked on September 20, 2012* -
## Language Arts

Which sentence uses a participial phrase? A) The fence, which was broken and dirty, looked terrible. B) Shutting out their opponent, the other team celebrated in victory. C) Swimming in the pool all day is my favorite way to spend the summer. D) I am

*asked on April 14, 2017* -
## Math

tan-1(tan(3pi/5))

*asked on July 7, 2013* -
## algebra

If four times a certain number increased by 6 is equal to 94, what is the number? If x represents the number, then which of the following equations could be used to solve the problem? 4x + 6 = 94 or 4(x + 6) = 94

*asked on July 28, 2011* -
## Chemistry

At standard temperature and pressure (0∘C and 1.00atm), 1.00mol of an ideal gas occupies a volume of 22.4L. What volume would the same amount of gas occupy at the same pressure and 30∘C?

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

Alex's distance form home is represented by the equation D= -0.5t +300 D represents his distance from home and t represents time in minutes How long will it take Alex to reach a distance of 182 km from home

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

Ava made 100 paper cranes, and Brittany made 3/4 of the number of paper cranes Ava made. Ava gave 9/20 of her paper cranes to Brittany. Then, Brittany gave 1/4 of her paper cranes to Ava. How many more paper cranes did Brittany have than Ava in the end?

*asked on May 21, 2015* -
## Check my answers? Math help.

2. Write an integer to represent owing your friend $10. –10 *** –2 2 10 3. Write the sum as a product, then simplify the product. (–8) + (–8) + (–8) + (–8) ( 2(–8) + 2(–8) = –30 4(–8) = –32 **** 4(–8) = 32 5(–8) = –40 4. What is

*asked on September 27, 2014* -
## Chemistry

3 I- (aq) +H3AsO4 (aq) + 2 H+ = I3- (aq) + H3AsO3 (aq) + H2O (l) is found to be first order with respect to each of the reactants. write the rate law. what is the over all order?

*asked on June 5, 2011* -
## Economic

3. A large share of the world supply of diamonds comes from Russia and South Africa. Suppose that the marginal cost of mining diamonds is constant at $1,000 per diamond, and the demand for diamond is described by the following schedule. Price/Quantity:

*asked on December 5, 2006* -
## Finance

Jiminy's Cricket Farm issued a 30-year, 7.2 percent semiannual bond 6 years ago. The bond currently sells for 87.5 percent of its face value. The book value of this debt issue is $103 million. In addition, the company has a second debt issue, a zero coupon

*asked on November 23, 2015* -
## Chemistry

What will happen to the number of moles of SO3 in equilibrium with SO2 and O2 in the following reaction in each of the following cases? 2 SO3(g) equilibrium reaction arrow 2 SO2(g) + O2(g) ΔH° = 197 kJ (a) Oxygen gas is removed. increase decrease stay

*asked on March 15, 2015* -
## Algebra

Using Cowling’s Rule what is the age of the child if the adults dose is 500mg and the child dose is 187 mg?

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

What are the step by step in finding the answer for this? 4C6H1206 carbon atoms: Hydrogen atoms: Oxygen atoms: Molecules:

*asked on September 19, 2012* -
## Economics

What components of GDP (if any) would each of the following transactions affect? Explain. (b) Aunt Jane buys a new house. (c) Ford sells a Mustang from its inventory. (g) Honda expands its factory in Marysville, Ohio. My Answers: (b) Investment since I

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

What is the circumference of the circle? Round your answer to the nearest tenth. The radius of the circle is 12.5 cm. A) 39.25 cm B) 392.5 cm C) 78.5 cm** D)785 cm If I'm right, I guess I did it right, if I'm not, please tell me and explain if you can, if

*asked on April 20, 2016* -
## Math

sin theta = 8/17 and theta is in the second quadrant. Find sin(2theta),cos(2theta),tan(2theta) exactly sin(2theta) cos(2theta) tan(2theta) sin(2theta) would it be 2 x (8/17) cos(2theta) would be 2 x (15/17) tan(2theta) would be 2 x (8/17 divided by 15/17)

*asked on November 14, 2014* -
## Math

A piece of wood is 8 and 7/8 in. long is cut a piece 45 1/2 in. long. If 1/16 is wasted for the cut, how much wood is left.

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

please help Solve for h in U= mgh. Please show steps.

*asked on May 4, 2013* -
## algebra

Triangles ABC and DEF are similar. Find the perimeter of triangle DEF. Round your answer to the nearest tenth.

*asked on March 1, 2013* -
## Chemistry

The neutralization of H3PO4 with KOH is exothermic. H3PO4(aq) + 3KOH(aq) -> 3H2O(l) +K3PO4(aq) +173.2KJ 70.0 mL of 0.207 M H3PO4 is mixed with 70.0 mL of 0.620 M KOH initially at 21.87 °C. Predict the final temperature of the solution if its density is

*asked on January 24, 2013* -
## math

19. A high school soccer team has two goalies. Goalie A makes the save 80% of the time. Goalie B makes the save 75% of the time. If goalie A plays 35 of the games and goalie B plays 25 of the games then: a) Determine the probability that a save has been

*asked on June 25, 2011* -
## vector

If two vectors u and v fit the equation (u − v) • (u − v) = u•u+v•v, how must these vectors u and v be related? What familiar theorem does this equation represent?

*asked on April 13, 2010* -
## Geometry

M is the midpoint of AB and N is the midpoint of AC, and T is the intersection of BN and CM. If BN is perpendicular to AC, BN = 12, and AC = 14, then find CT. Diagram is at: goo.gl/j3cBCE

*asked on April 13, 2017* -
## Physics

An infinitely long, solid insulating cylinder with radius a has positive charge uniformly distributed throughout it with a constant charge per unit volume p. a) using Gauss's law, derive the expression for the electric field inside the cylinder ra c)

*asked on June 15, 2016* -
## algebra

BASEBALL The equation h = –0.005x2 + x + 3 describes the path of a baseball hit into the outfield, where h is the height and x is the horizontal distance the ball travels. a. What is the equation of the axis of symmetry? b. What is the maximum height

*asked on February 26, 2016* -
## physics

A car is rounding a circular curve of radius r on a banked turn. As the drawing indicates, there are two forces acting on the car, its weight mg and the normal force FN exerted on it by the road. Which force, or force component, provides the centripetal

*asked on June 1, 2014* -
## Math

In right triangle ABC what is the arithmetic mean (average), in degrees, of the measures of the two smallest angles? Explain how the answer is 45 degrees.

*asked on March 11, 2013* -
## math

...A woman has a total of $9,000 to invest. She invests part of the money in an account that pays 5% per year and the rest in an account that pays 12% per year. If the interest earned in the first year is $730, how much did she invest in each account?

*asked on February 5, 2012* -
## geometry

A segment that is a units long makes a C-degree angle with a segment that is b units long. In terms of a, b, and C, find the third side of the triangle defined by this SAS description. You have done numerical versions of this question. Start by finding the

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

f(x)=xsquared+10 and g(x)= square root of x-1 and i have to figure out g(f(-3) i just don't know how to do it because i thought you could not have a negitive under a radical?

*asked on December 3, 2009* -
## Math

A milk company unconditionally guarantees that an unopened, properly refrigerated container of its milk will be fresh for 5 days after the date stamped on the carton. The company's data shows that unopened containers remain fresh on average for 6 days,

*asked on May 19, 2018* -
## math

Find the slope of the line through (-9,-10) and (-2,-5) A. -5/7*** B. 7/5 C. 5/7 D. -7/5

*asked on March 28, 2017* -
## precalculus

Find Pk + 1 if Pk = 7 + 13 + 19 + ...+[6(k - 1)+1] + (6k + 1) 7 + 13 + 19 + …+[6(k - 1) + 1] + (6k + 1) + [6(k + 1) + 1] 8 + 14 + 20 + …+[7(k - 1) + 1] + (7k + 1) 7 + 13 + 19 + …+(6k + 1) 7 + 13 + 19 + ...+[6(k - 1) + 1] + (6k7 +1) + (6k + 2)

*asked on December 14, 2016* -
## precalculus

Find a quadratic model for the sequence. -4, -4, -3, -1, 2

*asked on December 14, 2016* -
## Algebra 2

Describe the graph of y=1/2x-10 -3 compared to the graph of y=1/x

*asked on October 17, 2016* -
## math

If Will gives Molly $9, he will have the same amount of money as her. If Molly gives Will $9, the ratio of the money she has to the money Will has will be 1 : 2. How much money does Will have in the beginning?

*asked on March 29, 2015* -
## Chemistry

How do I balance CuSO4 + NH3 + H2O = (NH4)2SO4 + Cu(NH3)4(OH)2 Thank you!!!

*asked on November 24, 2014* -
## Math - Very urgent.

Use prime factors to find the LCD for each pair of fractions. a) 1/4, 1/8 b)1/6, 1/18

*asked on September 8, 2014* -
## Chemistry

Yesterday we combined Hydrochloric Acid HCl with Sodium Hydroxide NaOH in a violent reaction that resulted in water H2O and common table salt NaCl. How many grams of hydrochloric acid should we use so we have exactly enough to react with 40g of sodium

*asked on June 19, 2014* -
## MATH PLEASE HELP MRS.SUE!

What are the next three terms in the sequence? –1, 9, 19, 29, … (1 point) 38, 37, 32 40, 51, 62 39, 49, 59 38, 47, 56 2. Geoff planted dahlias in his garden. Dahlias have bulbs that divide and reproduce underground. In the first year, Geoff’s garden

*asked on May 7, 2014* -
## Spanish

Tu amigo insiste en preguntarte de quiénes son las cosas. Tú le contestas de forma muy enfática. 1.¿De quién es este sombrero? / tú 2.¿De quiénes son estos cinturones? / Tomás y Ricardo 3.¿De quiénes son estos zapatos? / Uds. 4.¿De quién son

*asked on June 2, 2013* -
## math

the bulletin board is 48 inches long and 24 inches wide. How many yards would they need for the trim?

*asked on February 11, 2012* -
## Physics

The acceleration of a certain rocket is given by ax=bt where b is positive constant, find the position and velocity at t=5.0s if Xo=0 and Vo=0 and b=3.0m/s^3?

*asked on October 8, 2009* -
## algebra

One-fifth of a flank is sawn off and three-eights of remaining piece is then thrown away.What fraction of original remains?

*asked on February 5, 2008* -
## Economics

Problem #1: If the economy is self-regulating, wouldn’t these scenarios represent correct and sequentially accurate economic explanation? a)

*asked on April 23, 2007* -
## Economics

3. Suppose the Clean Springs Water Company has a monopoly on bottled water sales. If the price of tap water increases, what is the change in Clean Water’s profit-maximizing levels of output, price, and profit? Explain in words and with a graph. Take a

*asked on December 1, 2006* -
## Math

If the points (4,2) and )-1, k) are on a line that is perpendicular to the line y=2x+1, what is the value of k?

*asked on October 26, 2018* -
## Psychology

I have to write an essay on a psychology concept and I was thinking about writing my essay on the concept of conformity. However, my professor prefers that we use media examples that occurred after the 28th of January. This example is to be used to explain

*asked on April 16, 2018* -
## Math

James has set up an ordinary annuity to save for his retirement in 17 years. If his quarterly payments are $650 and the annuity has an annual interest rate of 7%, what will be the value of the annuity when he retires? 650(1+.07/4)^17-1 =.3430281149

*asked on March 6, 2017* -
## precalculus

Can you check my answers? 1.Find the 5th term in the expansion of the binomial. (2x - 4)8 -458,752x3 286,720x4 458,752x3 35,840x4 answer: d 2.Find the 3rd term in the expansion of the binomial. (x - 2y)12 264x10y2 1760x9y3 -264x10y2 -1760x9y3 answer:a

*asked on December 16, 2016* -
## precalculus

Can you check my answers? 1.Which of the following shows the best next step to prove the following by mathematical induction? 3^n>n*2^n, n≥1 1.When n=1, the formula is valid because 3^1 1*2^1 3>2 2.Assuming that 3^k>k*2^k a.3^k+1>k+1*2^k+1

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

find Pk + 1 if Pk=2K-1/k!

*asked on December 14, 2016* -
## precalculus

Find a quadratic model for the sequence with the indicated terms. 3, 3, 5, 9, 15, 23, ...

*asked on December 14, 2016* -
## Algebra

Scores on a statewide standardized test are normally distributed with a mean of 12.89 and a standard deviation of 1.95. Certificates are given to students whose scores are in the top 2% of those who took the test. This means that they scored better than

*asked on June 9, 2016* -
## History

In the Eastern Orthodox Chrurch icons were once forbidden by the Pope true ** false check my answers please.

*asked on May 10, 2016* -
## Math

Alice is covering a foam cube with fabric to make a footstool. Each side of the cube is 20 inches. How many square inches of fabric will she need? 120 in** 720 in 1,200 in 2,400 in Please help!! I'm not sure I quite get it!

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

The Roman Empire was largest during which emperors rule? Hadrian Nerva Marcus Aurelius Trajan*** please help!

*asked on April 6, 2016* -
## chemistry cp

The term formula mass is a general term that can be applied to both ionic compounds and molecular compounds because (a) ionic compounds exist as individual molecules (b) molecular formulas are always empirical formulas (c) not all formulas represent

*asked on April 7, 2015* -
## Math - Very urgent.

Use multiples to find the LCD for each pair of fractions. a) 1/2, 1/3 b) 1/4, 1/5

*asked on September 8, 2014* -
## Science

Describe how the structure of DNA is correlated with its role as the molecular basis of inheritance in Biology.

*asked on March 28, 2014* -
## psychology

how do various behaviors of social dominance and coutship display affect the evolutionary process

*asked on September 4, 2013* -
## calculus

10). Find the area of the region bounded by the graph of f(x)=4lnx/x, y=0, x=5.8 11). Find the area of the region bounded by x=y^2-1y, x=0

*asked on April 14, 2013* -
## Physics

If a Mack truck and Honda Civic have a headon collision, upon which vehicle is the impact force greater and which vehicle experiences the greater acceleration? I know they have same force.

*asked on March 1, 2013* -
## chemistry

hemoglobin is the protein that transports O2 through the blood from the lungs to the rest of the body. in doing so, each molecule of hemoglobin combines with four molecules of O2. if 1.00 g of hemoglobin combines with 1.53 mL of O2 at 37 C and 743 torr,

*asked on February 20, 2013* -
## math

My son has been given the collinear problem below that has be stumped two folds. 1- By trying to solve the problem using (y2-y1)/(x2-x1)=slope -- and then, find the (b) in y=mx+b for two points takes way way too long to be a 7th grade probem. My son has

*asked on January 27, 2013* -
## Psychology

what is the study called where the same people are tested repeatedly at different ages?

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

how do you balance the equation with H3PO4(aq)and BaCl2(aq)?

*asked on October 21, 2012* -
## physics

A force of magnitude Fx acting in the x-direction on a 2.50-kg particle varies in time as shown in the figure below. (a) Find the impulse of the force. (b) Find the final velocity of the particle if it is initially at rest (c) Find the final velocity of

*asked on March 29, 2012* -
## celebrity fame

are taylor lautner and lily collins going out????

*asked on January 10, 2012* -
## Math

Express 120:80 as a ratio. Express 60:560 as a fraction.

*asked on December 6, 2011* -
## Math - Data please help!

1) A lotery has 1,000,000 tickets and draws 100 tickets to award prizes. How many tickets would you expect to have to purchase before you would win a prize? 2) Lesley claims she can roll triples with three dice in fewer than 20 rolls. a)what is the

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

1. What is the equation of the line that passes through (4,-1) and (-2,3)? 2. What is the equation of the line with an x-intercept of -1 and a y-intercept of 2?

*asked on August 6, 2011* -
## music

what similarities does Claudio Monteverdi and Antonio Vivaldi have in common?

*asked on April 15, 2011*