Adevice containing two key components fails when and only when both components fail. the lifetimes, t1 and t2, of these components are independent with common density function f(t)=e^-t for t > 0. the cost, x, of operating the device until failure is 2t1 + t2.
1. what is the density function of x for x > 0?

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.

Afunction g(x) has x-intercepts at (, 0) and (6, 0). which could be g(x)? g(x) = 2(x + 1)(x + 6) g(x) = (x – 6)(2x – 1) g(x) = 2(x – 2)(x – 6) g(x) = (x + 6)(x + 2)

Simplify. 3(4+4x) (type your answer in with no spaces)