Question

1. the number line shows the different temperatures for various places in the world. temperature in degrees celsius. melbourne 30. new delhi 20. london - 10. toronto - 15. enter the difference, in degrees, between toronto and melbourne.

Explanation:

Step1: Identify temperatures

Melbourne's temperature is $30^{\circ}C$ and Toronto's is $- 15^{\circ}C$ (estimated from the number - line).

Step2: Calculate temperature difference

The difference $\Delta T=30-(-15)$. Using the rule $a - (-b)=a + b$, we have $\Delta T = 30 + 15$.
$30+15 = 45$.

Answer:

$45$