Answer:

Step-by-step explanation:
We require more information by I will explain in principle:
If Type A has at least 300 hours and Type B at least 400 hours.

You need to determine the Probability density function of X and Y and then subtract 1 from both

This will give you the probability of the expression.
Area of the circle is the area covered by that circle. The area of the circle whose circumference is 7π m is 12.25π m².
<h3>What is the area of a circle?</h3>
The area of the circle is the area covered by that circle. It is given by the formula,
where r is the radius of the circle.
As it is given that the circumference of a circle is 7π m. Therefore, the radius of the circle can be written as,


Now, we know the formula of the area of a circle, therefore, the area of the circle can be written as,


Hence, the area of the circle whose circumference is 7π m is 12.25π m².
Learn more about Area of Circle:
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3 one is the answer I think
Answer:
It is both a relation and a function.
Step-by-step explanation:
Keith collected the names and ages of all of his classmates and organized them in the ordered pair (name, age).
Here, if we consider the name as the input and age is the output, then each and every different input there is a single output.
Because a single person can not have more than one age.
Therefore, it is both a relation and a function. (Answer)
Answer: 
Step-by-step explanation:
Given expression, 
= √(4×8)×√(4×7)×√3×√(3×√2)
= √4×√8×√4×√7×√3×√3×√2 ( because √(m×n)=√m×√n)
=√4×√4×√8×√2×√7×√3×√3
=4×√(4×2)×√2×√7×3
=4×√4×√2×√2×√7×3
=4×2×2×√7×3
=48√7
Thus,
=