Translate the sentence into an inequality The sum of 3 and w is grater than 22
1 answer:
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Answer:
A
Step-by-step explanation:
Discriminant is given by
If it is negative then in quadratic formula the square root part becomes negative which makes the solution complex.
so there cannot be any real solution if the Discriminant is negative or less than 0 ,
The correct option for the given question is
A
Question:
(a) How many bacteria would be found in 24 hours
(b) How many bacteria would be found in 2 days
(c) How long for 1000 bacteria to be found
Answer:
(a) 282429536481 bacteria
(b) bacteria
(c) 6 days
Step-by-step explanation:
The question illustrates an exponential function
Where
--- i.e. triples
Solving (a): Bacteria in 24 hours
In this case:
Substitute ,
and
So:
bacteria
Solving (b): Bacteria in 2 days
So:
Substitute ,
and
So:
bacteria
Solving (c): How long for 1000 bacteria
In this case:
Substitute ,
and
So:
Take Log of both sides
This gives:
Make x the subject
<em>Hence: It takes 6 days</em>