3 years ago

3- ¿Cuál es el último número natural positivo?

1 answer:

5 0

Answer:

Por definición convencional se dirá que cualquier elemento del siguiente conjunto, ℕ = {1, 2, 3, 4, …}, es un número natura

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The average speed of Car 1 = 45 mph.

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Answer:

$\boxed{\text{0.675 h}}$

Step-by-step explanation:

18 min = 0.3 h

Car 1 started 0.3 h before Car 2.

Let t = time of Car 2. Then

t + 0.3 = time of Car 1

Distance = speed × time, and both cars travel the same distance. Then

$\begin{array}{rcl}45(t + 0.3) & = & 65t\\45t + 13.5 & = & 65t\\20t & = & 13.5\\t & = & \textbf{0.675 h}\\\end{array}\\\text{Car will overtake Car 1 in } \boxed{\textbf{0.675 h}}$

Check:

$\begin{array}{rcl}45(0.675 + 0.3) & = & 65 \times 0.675\\45 \times 0.975 & = & 43.875\\43.875 & = & 43.875\\\end{array}$

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3- ¿Cuál es el último número natural positivo?​

3- ¿Cuál es el último número natural positivo?