1. In the 400-meter race, Hade ran in 54.3 seconds, Porter ran in 55.6 seconds, Harry ran in 52.7 seconds and Andy ran in 54.1 seconds. Who is
the fastest? *

Let the closed interval [a , b] be the domain of function f. the domain of f(x - 3) is given by (a) the open interval (a , b) (b) the closed interval [a , b] (c) the closed interval [a - 3 , b - 3] (d) the closed interval [a + 3 , b + 3]

I’m stuck on this equation, anyone got the answer?

Travis and paula went to lunch. travis ordered a sandwich for $7.50 and paula ordered a burger for $5.25.after lunch, they left a 15% tip for the waiter. how many money did they spend altogether?