Answer:
49
Step-by-step explanation:
First:The area of a circle is πr squared. Not r2
Second. The area of the circle HAS to be irrational because π is an irrational number. The answer would be, if solved for a circle with the radius of 0.75, the area would be 0.5625π, which is irrational.
To get the area of a rectangle you do base times height.
Since you know the area is 24(a^2)(b^3) , you make equation out of the base such as 6ab * width=24(a^2)(b^3).
Once you simplify this you find out the width is 4ab^2
Answer: No, the set of odd integers is not closed for addition
Explanation:
It's asking if we can take any two odd numbers, add them, and get an odd number result.
Here are some counterexamples
3+5 = 8
1+23 = 24
89+11 = 100
All it takes is one pair of odd numbers to add to something not odd to show that the set of odd integers is not closed for addition.
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In contrast, the set of even numbers is closed under addition. We can add any two even numbers to get some even number result
2+4 = 6
8+10 = 18
20+30 = 50
and so on
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The proof is given below
m and n are integers
2m = some even number
2n = some other even number
2m+2n = 2(m+n) = 2*(integer) = another even integer
This proves that adding any two even integers leads to another even integer.
0.63x12= 7.5 so the answer is 7.5