# Posts by Sally

Total # Posts: 1,222

**math and adding radicals**

what is 10 square root of 3u squared plus 6u squared square root of 3u squared? 33 45/56

**english**

What is the correct way to abbreviate fifties? '50s? 50's? What??? Sally, I have seen it both ways, but I believe that 50s is the better way to do it. If you're referring to the decade of the nineteen-fifties, then '50s -- or better yet, 1950s. Otherwise, use ...

**Economics**

A) I am confused, isnt it asking for average total cost, not TVC?

**Economics**

You’ve been hired by an unprofitable firm to determine whether it should shut down its unprofitable operation. The firm currently uses 70 workers to produce 300 units of output per day. The daily wage (per worker) is $100, and the price of the firm’s output is $30. ...

**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 firm in a long-run ...

**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 average total cost in...

**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: 8000/5000, 7000/6000, ...

**Economics**

For the following characteristic say whether it describes a perfectly competitive firm, a monopolistically competitive firm, monopoly firm, or neither. Equates marginal revenue and marginal cost I would think that it would be each one of them since each one uses the Golden ...

**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 shot. What do you ...

**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 structure (electron dot ...

**question**

do the experts on here draw graphs? Yes, we CAN draw graphs(manually) but not on the computer.

**Music**

Are string quartets chamber ensembles?

**Economics**

The marginal tax rate is defined as the extra taxes paid on additional income divided by the increase in income. Calculate the marginal tax rate for the proportional tax system as income rises from $50,000 to $100,000. Calculate the marginal tax rate as income rises from $100,...

**Economics**

The marginal tax rate is defined as the extra taxes paid on additional income divided by the increase in income. Calculate the marginal tax rate for the proportional tax system as income rises from $50,000 to $100,000. Calculate the marginal tax rate as income rises from $100,...

**business alliance**

Amazon. com and Toys "R" Us decided to work together to sell toys over the Internet. What decisions would executives from each company have to consider in order to complete this alliance? umm.. prices?? how the money is split up?? what else? Thanks.

**Math (related rates)**

My question is similar to Avik's but with different values. A camera, located 4 km from the launch pad, is tracking the rocket that is fired straight up. When the height of the rocket is 13 km, the camera is rotating at the rate of 3/169 radians per second. What is the ...

**MATH! Urgent**

umm suppose a parabola has a vertex at (0,2) and points (1,1) how would I derive the equation and focus, i've been trying to understand this for so long, I can't get it. Does this parabola have the equation (y-2)^2 = x and a focus of 1/4?? Is that correct?? I searched ...

**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 FeCl6^-3 ion can form...

**AP Biology - Starch**

Hello, I'm in deep need of your knowledge. If you may help me, I would appreciate it. The question is regarding the high catalyzation of starch, since it breaksdown at 100 C, why is the high temperature needed? Thanks -Sally As I remember, the action of the enzyme ...

**US History**

what flatlands in california lie between the sierra nevada and the coast range? what volcano dominates the southern portion of th island of hawaii? what flatlands extend sout from the chesapeake bay to the east of the coast of flordia? I went to http://www.lib.utexas.edu/maps/...

**helllllllllllllllppppppppppppp**

need help math I have a big square of 9little squares in it on the first row going down I got 1 4 6 that makes 11 ok I have to make 11 using those number on the other squares and I can not double the same number in every way it has to come out 11 straght ,down,side, across ...

**helpppppppp**

I have this problem abouth math pre algebra this is my problem I have 3 number that makes a total of 11 I have 1 4 6=11 in each way has to came out 11 up down side across and I have 2 more blanck spaces total of 3 its big square need help and I cant use the same numbers over ...