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To find the smallest possible value of 20P + 10Q + R when P, Q, and R are different positive integers, we should start by assigning the smallest possible values to P, Q, and R. Since they are different positive integers, we can assign P = 1, Q = 2, and R = 3. Substituting these values into the expression, we get 20(1) + 10(2) + 3 = 20 + 20 + 3 = 43. Therefore, the smallest possible value of 20P + 10Q + R is 43.
Finally, the P-Q or P-R interval gives a value for the time taken for the electrical impulse to travel from the atria to the ventricle (normally less than 0.2 seconds).
The answer is Q.
e-r diagram of scientific calculator
Let's take a deep breath and break this down. If p is 3 and q is 5, on number line A, we find p - q by starting at 3 and moving 5 spaces to the left, landing on -2. On number line B, for p + (-q), we start at 3 and move 5 spaces to the left, which brings us to -2 as well. Now, as for r, its value is not given in the question, so we can leave it open for now and continue with our peaceful math journey.