Step-by-step explanation:
Since AB=I, we have
det(A)det(B)=det(AB)=det(I)=1.
This implies that the determinants det(A) and det(B) are not zero.
Hence A,B are invertible matrices: A−1,B−1 exist.
Now we compute
I=BB−1=BIB−1=B(AB)B−1=BAI=BA.since AB=I
Hence we obtain BA=I.
Since AB=I and BA=I, we conclude that B=A−1.
The length of it's side and surface area is 2 meters and 24 meters square respectively
<h3>How to determine the parameters</h3>
The formula for calculating the volume of a cube is given as;
Volume = a^3
Where a is the length of it's side
Now, let's substitute the volume into the formula, we have
8000000 = a^3
Let's find the cube root of both sides
cube root of 8000000 = 200
cube root of a^3 = a
Then, we have
a = 200cm
The length of it's side in meters
= 200/100
= 2 meters
Surface area = 6a^2
Surface area = 6 × 2^2
Surface area = 6 × 4
Surface area = 24m ^2
Thus, the length of it's side and surface area is 2 meters and 24 meters square respectively.
Learn more about a cube here:
brainly.com/question/1972490
#SPJ1
Answer:
CIM
Step-by-step explanation:
C is the 3rd letter of the alphabet, A is the 1st, and B is the 2nd.
CAB = 3,1,2
Repeating for DEK:
DEK = 4,5,11
Comparing:
4−3 = 1
5−1 = 4
11−2 = 9
BED = 2,5,4, so adding the corresponding numbers:
2+1 = 3
5+4 = 9
4+9 = 13
So the code is CIM.
Both of the digits in the hundreds and tens place are 4, making it a relationship. The 4 in the hundreds place is worth 400, the 4 in the tens place is worth 40, and the 0 in the ones place is worth 0.
Hope this helped!
Nate
Answer:
38
Step-by-step explanation:
