Which best describes the range of the function f(x) = { 0)* after it has been reflected over the x-axis? all real numbers
all real numbers less than 0
all real numbers greater than 0
all real numbers less than or equal to 0

all real numbers less than 0

Step-by-step explanation:

In the picture attached, the question is shown.

The function described is an exponential decay with the form:

y = ab^x

where a = 2 and b = 1/4

The range of an exponential decay function is all real numbers greater than 0. This means that after f(x) has been reflected over the x-axis its range is all real numbers less than 0.

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation: