6. = The distance to an object can be calculated by using the time it takes for an echo to be heard: Distance = speed of sound x 1/2 time for echo to return A person is standing at an unknown distance from a wall. We want to know how far away the wall is from the person. The speed of sound is 344 meters per second. The person yells, and the echo takes 1.4 seconds to return. How far away is the wall in meters? Show calculations below.

close lines strong magnet less close weaker

v=ir = 3x15 =45 v

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 .

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2