Answer:
D: 70.3%
Step-by-step explanation:
Round by 8.2 then subtract that from 1.2 thats how you get 70.3%
Answer:2.21
Step-by-step explanation:I used a calculator
A door alarm works in 72 out of 100 cases.
surveillance camera works in 68 out of 100 cases.
The probability that method A is used = 72/100
The probability that method B is used = 68/100
Since both method are used we find the probability of A and B
Probability ( A and B) =
* 
=
Answer:
575x.25=143.75 575-143.75=$431.25
21.95x.15=$3.29 tip total bill $25.24
Step-by-step explanation: