Determine (without solving the problem) an interval in which the solution of the given initial value problem is certain to exist. t(t-18)y'+y=0, y(7)=3

One expression below in undefined, and the other expression has a well defined value. which expression is undefined and explain why it has no value. which expression is defined? what is the value of that expression and how do you know? what is a different expression using a trig inverse function that is also undefined?

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?