Question

The speed of sound V near the Earth's surface can be represented by this equation, V = 20vt+273 , where t is the temperature in degrees Celsius. Find the temperature when V = 380 meters per second. Round to the nearest whole number.

A. 88
B. 90
C. 92
D. 94

Answer 1

\[V = 20\sqrt{t + 273}\]

Answer 2

\[V = 20\sqrt{t + 273}\]
\[380=20\sqrt{t + 273}\]
\[19=\sqrt{t+273}\]
\[361=t+273\]
\[t=88\]

Answer 3

V = 20 √ (t + 273)
380 = 20 √ (t + 273)
19 = √ (t + 273)
Squaring both sides.
361 = t + 273
361 - 273 = t
88 = t

Answer 4

A. 88---> Answer