Answer:
A
Step-by-step explanation:
A is the only one that passes the vertical line test
(the vertical line test is when you can draw a line anywhere on the graph and it only touches the graph once) (another way of thinking about this is "no two points can have the same value on the x axis)
Answer: dude you can do this yourself.
Step-by-step explanation:
toss coins ;-;
Let
x = velocity of the water current
t1 = time taken to go downstream
t2 = time taken to go upstream
t1 + t2 = 8
t2 = 8 – t1
v = D/t
Downstream
(4 + x) = 6/ t1
t1 = 6/(4+x)
Upstream
(4 – x) = 6/t2
Substitute expression for t2 to obtain
(4 – x) = 6/ (8-t1)
Substituting the expression of t1 to make a single variable equation, obtaining
6 = (4-x)*(8 – 6/(4+x))
Solving for x,
x= 3.16 m/s
Bottom left
SA of a sphere = 4 x pi x radius^2 (squared)
4 x pi x 15^2 = 4 x 3.14 x 225
Yes you will need to simplify
