Answer: 39 + n
Explanation:
Sum —> addition
A number —> the unknown value, variable
The balanced equation for the given reaction 
<h3>What is a double replacement reaction?</h3>
A double replacement is a chemical reaction that takes place in which two reactants swap cations or anions to produce two distinct products.
Whenever the cations representing one of the reactants interact with the anions from another reactant to produce an insoluble ionic compound, a precipitate occurs.
The balanced equation for the given reaction:

Learn more about double displacement reactions here:
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Answer:
7+(y/5)
Step-by-step explanation:
Answer:
a) 0.0821
b) 0.0111
c) 0.0041
Step-by-step explanation:
Exponential distribution:
The exponential probability distribution, with mean m, is described by the following equation:

In which
is the decay parameter.
The probability that x is lower or equal to a is given by:

Which has the following solution:

Either it lasts more 5 years or less, or it survives more than 5 years. The sum of the probabilities of these events is decimal 1. So

In all 3 cases, we want P(X > 5). So

In which

(a) lambda=.5


(b) lambda=0.9


(c) lambda=1.1


Answer:
50
Step-by-step explanation:
just look at the segment in common
25×2=50