The scale of a map says that 2 cm represents 8 km. What is the actual number of kilometers that is represented by 3 centimeters
2 answers:
You might be interested in
The solution of the system of equation is the intersection point of the two quadratic equations, so we need to equate both equations, that is,
So, by moving the term -3x^3+20 to the left hand side, we have
Then, in order to solve this equation, we can apply the quadratic formula
In our case, a=5, b=-3 and c=-30. So we get
which gives
By substituting these points into one of the functions, we have
and
Then, by rounding these numbers to the nearest tenth, we have the following points:
Therefore, the answer is the last option
For this case we have that by definition of properties logarithm is met:
So, rewriting the expression we have:
By definition of logarithm we have to:
is equivalent to
So:
ANswer: