Answer:
Step-by-step explanation:
We need to first find the radius of the sphere.
The surface area of a sphere is given as:
where r is the radius
Therefore:
The radius of the sphere is 4 cm.
The volume of a sphere is given as:
Therefore, the volume of the sphere of radius 4 cm is;
The volume of the sphere is
Answer:
5
Step-by-step explanation:
First multiply 7 and 4
7 * 4 = 28
Then divide 140 by 28
140/28 = 5
Height is 5
Answer:
2 feet.
Step-by-step explanation:
Here the surface of the water is taken as the reference point. Let us take the depth of the swimmer below the water to be negative. Ali is 6 feet from the surface of the water so his height is -6. He then rose 4 feet so this need to be added to his initial height.
So, Ali has reached a height of . Hence, Ali is 2 feet from the surface of the water.
Answer:
123
Step-by-step explanation:
Answer:
Step-by-step explanation:
we are given
To find x-intercept means we have to find zeros
and for finding zeros , we will use quadratic formula
and we have it has two x-intercepts
so, it's discriminant must be greater than 0
so, we will find discriminant
now, we can compare with
and then we can find a , b and c
a = 3, b = 7, c = m
now, we can find D
It has two x-intercepts
so,
now, we can solve for m