1st find the midpoint
-3 + 3 = 0/2 = 0 for the x
2 + 2 = 4/2 = 4 for the y
the midpoint is (0,2) which is along the y-axis which is your answer
So, h(t) is how far is Daniel's head from the surface of the water, namely the surface itself is when the height is nill, so his head is at the surface and the height of it is just 0, thus h(t) = 0. Namely, what is "t" when h(t) is 0?

clearly the seconds cannot be a negative unit, so is not -3/2.
Sphere
The radius of the sphere is the only unknown variable need to find the volume of a sphere.
Step-by-step explanation:
Sphere is a geometrical three dimensional round figure with every point on its surface equidistant from its center. It is a three dimensional representation of a circle. A line which connects from the center to the surface is called radius of the sphere.The diameter of the sphere is the longest straight line which passes through the center of the sphere.
The volume of sphere is given by:
Volume of sphere(V) = 
where V is the volume of the sphere
r is the radius of the sphere
= 3.14
Hence the only unknown variable to find the volume of a sphere is the radius.
Answer:
(C) 18
Step-by-step explanation:
We can create a systems of equations. Assuming
is Michelle's age,
is Joan's age, and
is Ryan's age, the equations are:



We can use substitution, since we know the "values" of m and j.


So we know that Joan is 18 years old.
Hope this helped!