ANSWER
C. 28
EXPLANATION
The given expression is
We want to evaluate this function at x=-2.
We just have to substitute x=-2 into the given expression.
In other words, we have to replace x with -2 wherever we see x in the expression
We evaluate the exponent to get
We multiply next to get:
We now add to obtain:
The correct answer is C
The total area of the blades is the area of a triangle multiplied by 4.
We have then:
Where,
b: base of the blades
h: height of the blades
Substituting values we have:
Doing the calculation we have that the area of the blades is given by:
Answer:
The total area of the blades is:
Answer:
The nth term is given by:
The 30th term is 78.
Step-by-step explanation:
Arithmetic sequence:
The nth term of an arithmetic sequence is given by:
In which is the first term and d is the common difference between terms.
-9, -6, - 3,0
This means that . So
30th term:
The 30th term is 78.