# 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## Math

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

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

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

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

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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## algebra

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

*asked on May 4, 2013* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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. 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* -
## Math

Melonie wants to make a punch drink made with 2 1/2 gallons of orange juice,4 quarts cranberry juice,3quarts apple juice. How much punch will she make ?

*asked on April 23, 2019* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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* -
## 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

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* -
## History

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

*asked on April 6, 2016* -
## physics

Power applied to a particle varies with time as P=(3t^2-2t+1)W. Find the change in kinetic energy between t=1s and 4s.

*asked on October 27, 2015* -
## 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* -
## 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* -
## Physics

You hit someone with a force of 197 N. How much force is exerted on you? Answer in units of N Is the answer 197 N

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

Find all solutions w between 0 and 360, inclusive: (a) cosw = cos(−340) (b) cosw = sin 20 (c) sinw = cos(−10) (d) sin w < − 1/2 (e) 1 < tanw

*asked on April 12, 2010* -
## math/geometry

Jamie rides a Ferris wheel for five minutes. The diameter of the wheel is 10 meters,and its center is 6 meters above the ground. Each revolution of the wheel takes 30 seconds. Being more than 9 meters above the ground causes Jamie to suffer an anxiety

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

find the x- and y- intercepts f(x)= 25x^2+10x+1

*asked on September 4, 2009* -
## 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* -
## 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* -
## 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* -
## chemistry

Nitrogen dioxide abstracts with water vapor to produce oxygen and ammonia gas. If 12.8 grams of nitrogen dioxide reacts with 5.00 liter of water vapor at 375 degrees celisus and 725 tore, how many grams of ammonia can be produced? Use an ice table.

*asked on November 2, 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* -
## 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* -
## 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* -
## 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* -
## math

the length of a photograph is 1 cm less than twice the width. the area is 28 cm squared. find the dimensions of the photograph.

*asked on April 2, 2013* -
## Business

Firm A and firm B have debt-total asset ratios of 35% and 30% and ROA of 12% and 11%, respectively. Which firm has a greater ROE? I think that it is firm B since it has more equity financing its assets.

*asked on January 24, 2012* -
## 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* -
## 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* -
## College Chemistry

Of KCl and NaCl, which has a higher lattice energy? What is lattice energy? Lost. Please help.

*asked on October 24, 2010* -
## drama

Any ideas for a funny parody fairytale - good still winning over evil? I also need to make a role play out of this, so any ideas to do with plays are greatly appreciated.

*asked on September 13, 2010* -
## Trig

A. Find simpler, equivalent expressions for the following. Justify your answers. (a) sin(180 + è) (b) cos(180 + è) (c) tan(180 + è) B. Show that there are at least two ways to calculate the angle formed by the vectors [cos 19, sin 19] and [cos 54, sin

*asked on April 17, 2010* -
## Trig

4. Asked to simplify the expression sin(180−è), Rory volunteered the following solution: sin(180−è) = sin 180−sin è, and, because sin 180 is zero, it follows that sin(180−è) is the same as −sin è. Is this answer correct? If not, what is a

*asked on April 17, 2010* -
## math/trig

What graph is traced by the equation (x, y) = (5sin 12t , 6−5 cos 12t)?Think of another equation that will produce the same graph. Use your calculator to check.

*asked on April 11, 2010* -
## human services

What is the difference between primary, secondary, and tertiary preventio? I am workiong on three scenario's in hsm/210?

*asked on March 31, 2010* -
## Math

How do you solve this? I have tryed so many times and can not get the right answer. (1.65-1.05)^2/0.4+0.8 The answer is suppose to be 1.7 but everytime I do the problem i don't get anything near that answer. Help would be greatly appreciated.

*asked on January 21, 2010* -
## 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* -
## Math

Express 3/8a^3y^5 using rational exponents.

*asked on July 2, 2009* -
## Geometry

What is the hypothesis of the statement below? If two triangles are isosceles right triangles,then they are similar.

*asked on June 3, 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* -
## science

Before Mendeleev published his periodic table, Johann Döbereiner grouped similar elements into triads, in which the unknown properties of one member could be predicted by averaging known values of the properties of the others. To test this idea, predict

*asked on November 9, 2007* -
## 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

For the following characteristic say whether it describes a perfectly competitive firm, a monopolistically competitive firm, monopoly firm, or neither. a. Has marginal revenue less than price. I would think this would be neither. b. Produces at minimum of

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

What if when I find my product, I get the same compound as I did in my reactant? For example, FeCl3 + HCl ->FeCl3 + HCl. Then something is wrong. In this case, FeCl3 and HCl usually don't react. In very concentrated solutions of HCl, the FeCl4^- or

*asked on October 21, 2006* -
## English

What is the definition of narrative poem? a poem that tells a story a poem that tells how someone feels**** a poem that is told with words that rhyme at the ends of lines a poem that is told by a speaker

*asked on April 2, 2020* -
## economics

In the early 1980s, when the Polish people had to stand in long lines in order to purchase most consumer goods, the communist government ordered that every third place in line be reserved for pregnant women or disabled persons. This was presumably done to

*asked on September 12, 2019*