With the first problem: You always divide from the left, then the rigth. 2+246/6 = 246/6=41 41+2=43
Step-by-step explanation:
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SOLUTION:
Case: Functions interval
Given: A function graph
Required: To find the region where the graph is increasing
Method:
The region where there is increase is where the graph has a positive slope, i.e. the region where the graph is moving from bottom left to top right.
We see the region on the graph as (-2, -2) to (2, 2)
Picking the x- axis only, this is (-2,2)
Final answer:
The final answer is (-2, 2)
Answer:
Method 1 (using the area of a whole circle and dividing by 4)
First work out the area of the whole circle by substituting the radius of 8cm into the formula for the area of the circle:
A = π ×r²
= π ×8²
= 64π (leave the answer as an exact solution as this need to be divided by 4).
So all you need to do now is divide the answer by 4:
Area of a quadrant = 64π ÷4 = 16π = 50.3 cm² to 3 significant figures.
Method 2 (using ¼ πr²)
Substitute r = 8 directly into the formula A = ¼ πr².
A = ¼ πr².
A = ¼ × π × 8².
A = 50.3 cm²
As you can see it gives exactly the same answer as method 1.