Answer:
b
Step-by-step explanation:
1.6 x 10^5 / 0.2 x 10^2
10^{5-2} x 1.6 / 0.2
10^3 x 1.6 / 0.2
1600 / 0.2
'y' is NOT the number of chairs in each row and column. It's the TOTAL number of
chairs, so it's the product of (chairs in each row) times (chairs in each column).
The problem says that those numbers are equal. So we would expect the TOTAL
to be a perfect square, and the number in each row and each column to be the
square root of the total. Since the total is 81, the number in each row and column
could be either +9 or -9 . Both answers are mathematically correct, but -9
doesn't make sense in the real world. So we know that +9 is the real answer.
Answer:
c.7/9
Step-by-step explanation:
:)
Answer:
If (a and b )≤ 0 then 
is disproved
Step-by-step explanation:
If a and b are positive real numbers then:
But if a and b are negative then this axiom is not true as log is not defined
= undefined 
So if (a and b )≤ 0 then 
and 
are undefined but 
is defined.
