2. your grandfather has enjoyed good vision for most of his 80 years. you observe him having trouble reading websites on his new ipad, squinting while he moves it towards and away from his face. you realize he might benefit from reading glasses. since you were going out anyway, you offer to pick up a pair of glasses for him at the drug store. consider that your grandfather is at his most comfortable reading posture when he is holding the ipad at a distance of 18 inches (this is the focal length). a. what visual condition is grandpa mostly suffering from, in medically-correct terminology? b. what dioptric power of reading glasses should you get for your grandfather? note that reading glasses are normally available in increments of 0.25 diopter.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .