Answer:

Step-by-step explanation:
Given
×
+
×
( perform multiplication before addition )
=
+ 
=
( divide numerator/ denominator by 5 to simplify )
= 
Answer:
B
1:3
Step-by-step explanation:
4:12
simplify
divide both by 4
1:3
Answer:
C) 0.880
B) 0.075
Step-by-step explanation:
If the professor forgets to set the alarm
Probability = 0.1,
Wakes up in time probability = 0.25.
If the professor sets the alarm
Probability = 1 - 0.1 = 0.9
Wake up in time probability = 0.95.
A.)
The probability that professor Moore wakes up in time to make his first class tomorrow
Probability = ( Forgets to set alarm probability x Wakes up in time )+ ( Sets the alarm probability x Wakes up in time ) = ( 0.1 x 0.25 ) + ( 0.9 + 0.95 ) = 0.88
B.)
Late in the class
Set the Alarm Probability = 0.1
Wakes up late probability = 1 - 0.25 = 0.75
Professor Sets the alarm probability = Set the Alarm Probability x Wakes up late probability = 0.1 x 0.75 = 0.075
So basically since they are all negative you would go down and count to see which point is higher since it’s a negative and that would be Point H -3 1/2