Hi there! :)
Answer:

Step-by-step explanation:
Formula for the area of a circle:

Rearrange the equation in terms of "r":
Divide 'π' from both sides:

Take the square root of both sides:

Answer:
c) 21.4
Step-by-step explanation:
9.5 times 1.5 times 1.5 is 21.375 or 21.4 rounded
So LCM means least common multiple, and it would be 210.
Hope this helps you :)
Answer:
x=-1, x= 1
Step-by-step explanation:
Answer:
Option C. −4≤t≤−3
Step-by-step explanation:
we have

This is the equation of a vertical parabola written in vertex form
The parabola open upward (the leading coefficient is positive)
The vertex is a minimum
The vertex is the point (-3,5)
The function is increasing in the interval [-3,∞)
The function is decreasing in the interval (-∞,-3]
The function will have a negative average rate when the function will be decreasing
therefore
the answer is option C