Answer:
55*5=275
Step-by-step explanation:
To answer this question, you will use the formula given to find the volume of concrete.
V = 3.14 x 0.6^2 x 30
V = 33.912m³
The volume of concrete is approximately 33.912 m³.
-7-13k would be the answer
Ok, the vector equation of a plane is:<span>n∗(r−<span>r0</span>)=0</span>where n is a vector normal to the plane, r is the position vector of an arbitrary point in the plane and r0 is the position vector of a given point in the plane. We need a normal vector to solve this. To get a normal vector, we use the given information that our plane is perpendicular to the y-axis. Therefore, our normal vector must be parallel to the y-axis. Any vector parallel to the y-axis will do, so I choose the unit vector <0,1,0> for simplicity. We have:<span><0,1,0>∗<x−2,y−3,z−4<span>>=</span>0</span>giving,<span>y=3</span><span>This makes sense, since the y-coordinate must be constant, and there is no restriction on the values x,z that lie on the plane in 3-space. </span>
In my opinion the concepts that belong in the branch of mathematics would be algebra, geometry, trigonometry, calculus, statistics, and probability. All of the following are known the be main branches of pure mathematics.