Answer:
The answer is 4.
Step-by-step explanation:
Given problem,
8 + (-4)
Since, in the number line the numbers left to zero are negative and right to zero are positive,
When, we move towards a negative number then we move left side while when we move towards a positive number then we move right side,
Thus, the steps involve in the given problem are follow,
Step 1 : Find 8 on the number line,
Step : we have -4, means we need to move left side 4 unit from 8,
Step 3 : the final position is 4.
Hence, 8 + (-4) = 4
Answer:
≈ 12.57 units squared
Step-by-step explanation:
The area of a circle is denoted by: , where r is the radius.
Remember that diameter is twice the radius, so since the diameter equals 4, we know that the radius r = 4/2 = 2.
Now, plug this in:
We can round 4pi to 12.57 units squared.
Hope this helps!