The area of a circle is pi * radius squared, thus the area of the circle is 64(pi). Since we have a sector with 90 degree angle, the area of the sector is exactly 1/4 the area of the entire circle, or 16(pi)
Answer:
The value of a Cartesian product between an empty set and set A is equal to the empty set.
Step-by-step explanation:
The cartesian product is given by:
A×B= {(a,b): a∈A, b∈B}
This means that each element of set A is combined with an element of set B.
The empty set is the unique set having no elements and its size is zero.
Let Ф be the empty set and let A be a set of elements chosen from U.
A×Ф=Ф
Since the empty set has no elements, no ordered pairs can be formed and the result is the empty set.
Answer:
7
Step-by-step explanation:
7x4=28
6x4=24
So it cant be 6 or anything less
