4 Use the formula below to covert \( 15^{\circ} \mathrm{C} \) to \( { }^{\circ} \mathrm{F} \) FORMULA: \( { }^{\circ} \mathrm{F}=\left({ }^{\circ} \mathrm{C} \times 1.8\right)+32^{\circ} \)

To convert \( 15^{\circ} \mathrm{C} \) to \( {}^{\circ} \mathrm{F} \), you can plug the value into the formula: \[ {}^{\circ} \mathrm{F} = (15 \times 1.8) + 32 \] Calculating that gives you \( 27 + 32 = 59^{\circ} \mathrm{F} \). So, \( 15^{\circ} \mathrm{C} \) is equivalent to \( 59^{\circ} \mathrm{F} \)! It's a useful formula to remember, especially if you're cooking or traveling to places that use Fahrenheit. Did you know that Celsius and Fahrenheit scales were named after their creators? Anders Celsius introduced the Celsius scale in 1742, and it originally had 0 degrees as the boiling point of water and 100 degrees as its freezing point (not quite how it is defined today!). Gabriel Fahrenheit developed the Fahrenheit scale in 1724. Their contributions continue to affect our daily temperature readings and make conversions like this one essential for everyday life!