Answer: A.) b= 2a/h-c
1/2h(b+c)= A
2×1/2h(b+c)=A×2
h(b+c)=2A
h÷h(b+c)=2A÷h
b+c=2A/h
b+c-c=2A/h-c
b=2A/h-c
I hope this is good enough:
Answer:
Option D.
Step-by-step explanation:
Precision refers to the the level of measurement and exactness of a measurement. The mean diference between '<em>precision</em>' and '<em>exactness</em>' is that if a measuring device gives consisten measurements it's considered precise, but it's not necessarily accurate.
For example, a measurement of 2.365m is more precise than a measurement of 2.3m, given that 2.365m has more significant figures and was made with an instrument that has higher precision. This doesn't mean that the measurement is accurate, the real value could be 3m for example! ✅
Answer:
105 meters
Step-by-step explanation:
Answer:
a) 0.2416
b) 0.4172
c) 0.0253
Step-by-step explanation:
Since the result of the test should be independent of the time , then the that the test number of times that test proves correct is independent of the days the river is correct .
denoting event a A=the test proves correct and B=the river is polluted
a) the test indicates pollution when
- the river is polluted and the test is correct
- the river is not polluted and the test fails
then
P(test indicates pollution)= P(A)*P(B)+ (1-P(A))*(1-P(B)) = 0.12*0.84+0.88*0.16 = 0.2416
b) according to Bayes
P(A∩B)= P(A/B)*P(B) → P(A/B)=P(A∩B)/P(B)
then
P(pollution exists/test indicates pollution)=P(A∩B)/P(B) = 0.84*0.12 / 0.2416 = 0.4172
c) since
P(test indicates no pollution)= P(A)*(1-P(B))+ (1-P(A))*P(B) = 0.84*0.88+ 0.16*0.12 = 0.7584
the rate of false positives is
P(river is polluted/test indicates no pollution) = 0.12*0.16 / 0.7584 = 0.0253
Answer:
She ate 5 apple slices
Step-by-step explanation:
25% of 20 is 5.
That means if she ate 5 slices, she ate 25% of the apple slices.
Hope this helped! Please give brainliest if it did help!
