The correct answer is B

Let us do the first product,
We have;

We can re-group the sign and the numbers to obtain;

But we know that; negative times negative is positive. So the product becomes,

Similarly for the second product,
We have;

We can again re-group the sign and the numbers to obtain;

But we know that; negative times negative is positive. So the product becomes,

Putting all together gives,

Finally, positive times positive will also give positive. That is,
Introduce the following notations of events:
A "The person has the disease"
B "The test is positive", C "the test is erroneous"
Our formula will be then:
So the probability we are looking for is 0.19
Answer:
The metal worker should use 10 kgs of 25% copper alloy and 40kgs of 70% copper alloy to make it
Step-by-step explanation:
Answer:
84.853 ft
Step-by-step explanation:
A^2 + B^2 = C^2 | 60^2 + 60^2 = 84.853