It's very important to use the symbol " ^ " here to denote exponentiation.
You probably meant "-10x^(-10), which would be "-10 times x to the minus tenth power."
If you want the value, you could do the following:
-10 1
------------------ = - ---------- = - 10^(-9).
10^10 10^9
No, there can not be negative amplitude because it is just the distance between the max and the midline or the minimum and the midline.
I see where you might be confused because for instance in the trig equation:
y = -3 sin (.5(x-

/2)) -1, there is a negative in front of the amplitude. However, when finding the amplitude, you take the absolute value of a.
Speed of the boat = u
speed of the current = v
In downstream,
u - v = 280/7
u - v = 40
In upstream,
u + v = 280/14
u + v = 20
Add both equations
2u = 60
u = 30
v = -10
Speed of the boat = 30 km/h
Answer:Dependent
Step-by-step explanation: It is dependent because the probability could change depending on which marble is pulled