Mario made the mistake on everything and he needs help
Answer:
t= 3 years
Step-by-step explanation:
So far we have 2 useful relationships
and 
Now, clearing t

I apply logarithm
years
Done
Subtract. 92-88=Percent change
Your percent change would be 4%
The rejection region is give by

where the test statistics is given by

i.e.

Thus,

Using the statistical table, the level of the test is 0.04.
Answer:
∠ C = 44°
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Sum the 3 angles and equate to 180, that is
4x - 16 +6x - 1 + 4x - 13 = 180°
14x - 30 = 180 ( add 30 to both sides )
14x = 210 ( divide both sides by 14 )
x = 15
Thus
∠ C = 4x - 16 = 4(15) - 16 = 60 - 16 = 44°