What best definition describes a buffer?

Which of these describes a situation in which people have to pay a deductiable? What does can't mean? What is the difference between differential continuity and absolute continuity? Is g greater or less than mg? Which of these is true of an annuity? If the exchange rate between the U.S. dollar and the Canadian dollar is 11.3 which is true? What value of A satisfies the equation 2sinA-1 equals 0? Why do you need total derivative and partial derivative? What is the domain and range of -x plus 2? Which day of the month does the RPI come out? Wo kon si cheez hai jo aap k pass ho sakta or na ho to janaza nahi ho sakta? Rebecca's 5000 CD is nearing its maturity and will have a maturity value of 6101.89. The renewal rate for her CD will be at a historic low and will lock up her money for another 5 years. Which option? What is the meaning of regrades? How many kilo calories of heat does an expenditure of 250 kj produce? What month comes 4 months after April? The expression sec x - sin x tan x is equivalent to? Solve the system of equations 3x plus y plus 2z equal 1 also 2x minus y plus z equals negative 3 also x plus y minus 4z equals negative 3? How can you use 2 x 8 to find 4 x 8? What is the longest math equation? What are the compsition of function?