Answer:
0.87
Step-by-step explanation:
According to the scenario, computation of given data are as follows,
As, each must be activated, this shows that components are in series.
So, we can calculate reliability of system by using following formula,
System reliability with components in series = System reliability 1 × System reliability 2 × System reliability 3 × System reliability 4
So, overall system reliability = 0.97 × 0.99 × 0.97 × 0.93
overall system reliability = 0.866 or 0.87
You should be able to multiply 91 by 8 to get the sum of the first 8 tests, then add the score on the 9th test. Then to get the average of the sum of the 9 tests you need to divide it by 9.
((91*8)+78)/9=89.555555555555.... So, 90%
Answer:
2%
Step-by-step explanation:
Answer:
a 12.56 cm2
Step-by-step explanation:
area = πr² or I'd
step 1: substitute (plug in) for r which in here is 2
π(2)²
step 2: follow order of operations
(2)²= 4 *π= 12.56
P- parenthesis
E-exponent
MD- multiply and divide from left to right
AS- add and subtract from left to right
