Use proportions and use letters for unknown measurements
Answer:
452.39 mi^2
Step-by-step explanation:
A = πr^2
A = π (12mi)^2
A = 452.39 mi^2
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Please mark Brainliest :D
Answer:
0.405 or 40.5%
Step-by-step explanation:
Let event A=having a periodontal disease
event B=having a heart attack
we are given
P(A)=P(having a periodontal disease)=0.30
P(B)=P(having a heart attack)=0.15
P(A/B)=P(have a periodontal disease/have a heart attack)=0.81
P(B/A)=P(have a heart attack/have a periodontal disease)=?
P(A/B)=P(A∩B)/P(B)
P(A∩B)=P(B)*P(A/B)=0.15*0.81=0.1215
P(B/A)=P(A∩B)/P(A)=0.1215/0.3=0.405
There is 40.5% probability that if someone has periodontal disease will have a heart attack.
Answer:
6 three-point shots
Step-by-step explanation:
Amount of points scored in nine games = 162 points
If he scored the same number of three-point shots in each game, the nmber of three points shots he made in each game will be expressed as;
1 game = x points
Since 9 games = 162 points
We will cross multiply and get s:
9 * x = 162 * 1
9x = 162
Divide both sides by 9;
9x/9 = 162/9
x = 18
Hence he has made 18 points in one game.
The number of 3 points shot made per game will be 18/3 = 6 three-point shots
Answer:
-12
Step-by-step explanation:
x+7-4x=19-2x
-3x+2x=19-7
-x=12
x=-12
