Businesses (also known as Investments) are the core part of earning money in AdVenture Capitalist. Clicking on a business, starts a timer; when the timer runs out, it makes the listed amount of money. Purchasing more than one business multiplies the earnings linearly. It can be increased further by buying Upgrades or earning Unlocks.
Whenever a business is bought, the cost to buy the next one increases by a coefficient. For example, the first Car Wash is $720, but the second is $720*1.14, or $829.92. Buying 10 or 100 businesses at once gives no savings; the cost is just the total cost the player would pay if the buy button is clicked 10 or 100 times.
NotesEdit

"Business" indicates the name of the business the player can invest in.

"Initial cost" indicates the cost of the first investment in that business. Is multiplied by the coefficient for each subsequent buy. (see below)

"Coefficient", as already described, is the cost multiplier for each additional investment in the respective business. So, for the Car Wash, each additional investment increases in price by 14% every time. Is a constant for each of the businesses.
 "Initial time" is the amount of seconds  in parentheses, of hours  the production cycle of the business needs to complete without any bonuses. Initially, for long production cycles, the ideal time to buy new investments is just before the end of the cycle, as the added profit will be reaped in full at their completion. Gets halved at 25, 50, 100, 200, 300, and 400 of each business' investments and is further halved at the same milestones when all businesses reach them. Total amount of production cycle halving happens for 12 times maximum (so the production cycle time can get to be a 1/4096th of the initial one).

"Initial revenue" refers to the amount of money each investment for that business makes at the end of the production cycle (see above) without upgrades or bonuses. It multiplies linearly to the amount of investments the player has for the business, meaning that the 145th investment for the Bank will add 1,074,954,240 dollars to the total revenue of the business, identical to the sum added by the very first investment  the initial purchase. Gets multiplied by various milestones, including the ones obtainable by investing in the Newspaper business (see the gallery under Unlocks).

"Initial productivity" expresses the amount of money the business makes per second without any upgrades or bonuses for the revenue nor for the production cycle speed. Revenue / Production Cycle Time.
Earth BusinessesEdit
Additional NotesEdit
 The game starts with a single free lemonade stand, and the second stand has a price of 4$. As far as formulas are concerned, the first stand has a price equivalent to 4/1.07 ≈ 3.738$
 The highest possible number of businesses you can own is 2,147,483,647, which is the highest 32bit integer. Buying one more would subtract your money. However, this is much lower for limits in Unity: up to 5,049 Newspaper Deliveries may be bought before the price reaches infinity on the next one. The maximum price is ~179.769 uncentillion or roughly 21024.
 The time required for a business to earn money can seem daunting at first, especially the tenhour time for the Oil Company. Time required to receive profits is halved at 25, 50, 100, 200, 300, and 400 units of each business type (i.e. if you own 25 Lemonade Stands, the timetoprofit for lemonade stands is halved). It's further halved each time all buildings reach one of those milestones. (That is, if you have 25 of every building, the time for all buildings is cut in half again, on top of the existing reductions from the individual building counts.) If you make it all the way to 400 of each building, even the Oil Company's duration goes by in a flash  about 9 seconds!
 The equation to calculate the price of a business is Summation(Initial Cost * (Coefficient)^(n1), where
n = the total number of businesses after purchasing.  Maximum number of investments bought before exceeding 2^{1024} (about 179.769 uncentillion). Values higher than this will result in an infinite price. Investments obtained that sacrifice Angel Investors are excluded.
 10,470 Lemonade Stand
 5,049 Newspaper Delivery
 5,366 Car Wash
 5,733 Pizza Delivery
 6,161 Donut Shop
 6,666 Shrimp Boat
 7,273 Hockey Team
 8,015 Movie Studio
 8,943 Bank
 10,136 Oil Company
More CoefficientsEdit
ExplanationEdit
 The Base Coefficient is how much more expensive the next business is compared to the current. So if one Movie Studio costs $10 million, then the next Movie Studio will cost 1.09 * $10 million = $10.9 million.
In practice, this coefficient is not very useful  it tells that Newspapers become expensive a lot more quickly than Lemonade / Oil, but if the player is buying one business at a time the numbers don't increase very quickly either way.
 The x10 Coefficient is how much more expensive the next ten buildings are compared to the current ten. So if ten Movie Studios cost $100 million, buying ten more would cost an extra 2.37 * $100 million = $237 million.
This coefficient is very useful if the player is buying businesses ten at a time and want to estimate how much they'll need to spend before a major upgrade. For example, if the player has 470 lemonade stands, and they want 500, and ten Lemonade Stands cost $3.337 quadrillion. Then they'll know that to get thirty Lemonade Stands, they'll need $3.337 quadrillion + (about 2) * $3.337 quadrillion + (about 2*2) * $3.337 quadrillion = (about 7) * $3.337 quadrillion = about $23 quadrillion. The actual amount is $22.697 quadrillion.
 The x100 Coefficient is how much more expensive the next one hundred buildings are compared to the current one hundred. So if one hundred Movie Studios cost $1 billion, the next one hundred would cost $5.529 trillion.
 The 10>50 Multiplier is how much 50 buildings cost, compared to how much 10 cost. So if ten Movie Studios cost $100 million, then buying 50 would cost 53.8 * $100 million = $5.38 billion. This is very useful for estimating upgrades that aren't even 100's.
 Calculating the total cost of N number of buildings: (Initial Cost * (1  Coefficent^{N})) / (1  Coefficient). For example, calculating total money spent on oil rigs after purchasing the 100th one: ($25,798,901,760 * (1  1.07^{100})) / (1  1.07) = $319,433,276,243,943. Or 100 Oil rigs cost a little over 319 Trillion dollars. This is known as a finite geometric series.
Wikipedia page on geometric series
Moon Businesses Edit
Additional NotesEdit
 The maximum number of investments that can be bought is:
 14,514 Moon Shoe
 3,699 Gravity Booth
 10,372 Payday Clone
 4,019 Moon Express
 8,084 Oxygen Bar
 4,958 Helium3 Farm
 5,645 Cheese Mine
 4,375 Amusement Park
 6,553 Werewolf Colony
 1,682 Giant Laser