Hi,

 I have this problem that I am not able to solve because I do not know anything about mixtures.

  A car's radiotor contains 12 L of antifreeze at 25% concentration. How many liters must be drained and then replaced by pure antifreeze to bring the concentration to 50%?

 The answer is 4L but the book did not provide workings. Please show me the workings.

Thank you.

Can someone explain in detail the following formula?

(Gradient)*E=0 (without source or current)

Let the real money demand in the economy equal LD = 10 + 2Y – 8r. The price level P is fixed at P = 1. Y is the level of output and r is the rate of interest. What is the LM curve for this economy?

A major research institution (MRI) has recently announced the discovery of the heaviest chemical element yet known to science. The new element has been tentatively named Governmentium. Governmentium has 1 neutron, 12 assistant neutrons, 75 deputy neutrons, and 224 assistant deputy neutrons, giving it an atomic mass of 312. These 312 particles are held together by forces called morons, which are surrounded by vast quantities of lepton-like particles called peons.

Since Governmentium has no electrons, it is inert. However, it can be detected as it impedes every reaction with which it comes into contact. A minute amount of Governmentium causes one reaction to take over four days to complete when it would normally take less than a second. Governmentium has a normal half-life of three years; it does not decay, but instead undergoes a reorganization in which a portion of the assistant neutrons and deputy neutrons exchange places. In fact, governmentium's mass will actually increase over time, since each reorganization will cause some morons to become neutrons, forming isodopes.

This characteristic of moron-promotion leads some scientists to speculate that Governmentium is formed whenever morons reach a certain quantity in concentration. This hypothetical quantity is referred to as Critical Morass.

Dear Professor Cram:

A waterskier is being pulled at a constant velocity of 15.8m/s. The drag force on the boat is 280N.  What is the foce applied to the boat by the propellor?

I don't even know where to start with this one. help please.

 Dear Professor Cram

On mars, the acceleration due to gravity is 3.71m/s2. What would a rock's velocity be 0.5 sec. after you dropped it on mars?

What is the formula for this problem

There is no substitute for a full, rich, creamy cheesecake. I have tried dozens of cheesecake recipes and made variants on old favorites. It seems there are two distinct classes for basic cheesecakes - the heavy old fashion "New York" style, and a very light cheesecake. I prefer both to be served at room temperature both for texture and flavor.

Here is the primer for making your own cheesecake from any cheesecake recipe. It covers all the basic tools, choices for crusts, preparing the batter, tips for baking, and variants for cheesecake toppings. There are links to other favorite cheesecake recipes, including specialty cheesecake recipes.

How does the money multiplier differ when currency holdings are zero, compared to when currency holdings are greater then zero?

If the currency -to-deposit ratio increases, what effect, if any, does this have on the monetary base, the money supply, total depsoits, and economic growth?

Dear Professor Cram, 

I need your advise. Business sells items. 25% customers pay next month. For Oct. cash collected was $21000 and $6500(accounts receivable) from Sept. Total-27500. What is revenue in this case?

Thank you,

Luiza

___________________

If you are on cash basis accounting, this is simply the $27,500 received in the month.

However, I expect you are on accrual basis, in which case the sales made in the month are what you want to count instead of the cash received. Under accrual, you sold $21,000 that you already collected on, and another 25% that will be collected the following month. Therefore, the $21,000 is 75% of revenue for the month. Now it becomes an algebra problem:

$21,000/.75 = $28,000 

The $6,500 of accounts receivable is the 25% of the prior month's revenue, so it doesn't count for this month.

Good studying! 

I'm doing this assignment and I'm totally lost,

U.S. :

d= 200 -40p

s= 40 +40p

Rest of the world:

d= 160 -40p

s= 80 +40p

The U.S. govenment imposes a quota of 32 units on its imports. Calculate the magnitude of deadweight loss resulting from the quota under the assumption that the U.S. is a small open economy?

If anyone knows about this it would great if you could help me out!