Answer:
"4.71" is the correct answer.
Step-by-step explanation:
As we know, 45 envelopes addressed in 2 hours then,
⇒ 
and, 45 in 3 hours,
⇒ 
Now by adding all together, we get
⇒ 
⇒ 
and multiply it by "4.71", we get
⇒ 
⇒ 
Round it "310".
So that "4.71" is the right answer.
Answer:
k = -2
Step-by-step explanation:
f(x) = (x − h)² + k
(h, k) is the (x, y) coordinate of the vertex
For a vertex of (4, -2)
h = 4
k = -2
From the definition of logarithm, we know that:

In this case

and

so:
Answer:
1 root
Step-by-step explanation:
A linear equation should only cross the x-axis at one point. That means there would only be 1 root. (Root is when y= 0)