The velocity of sound in air is given by the equation V equals 20 square root 273+ T, where V is the velocity in meters per second and T is the temperature in degrees Celsius. a.) Find the temperature when the velocity of sound in air is 420 m/s. Round the answer to the nearest degree.
b.) Find the velocity of sound in meters per second when the temperature is 40°C. Round the answer to the nearest meter per second.

1. writing an equation for an exponential function by 2. a piece of paper that is 0.6 millimeter thick is folded. write an equation for the thickness t of the paper in millimeters as a function of the number n of folds. the equation is t(n)= 3. enter an equation for the function that includes the points. (-2, 2/5) and (-1,2)

How do i i solve this equation? -18 = x/3 + 3

Astudent solves the equation for v. start with the original equation. use the square root property. use the division property of equality. use the multiplication property of equality. simplify. which statement explains how to correct the error that was made? the square root property must be applied after all other properties of equality are applied. the multiplication property of equality should have been applied before the division property of equality. the division property of equality should have been applied to move the fraction to the other side of the equation. the square root property should have been applied to both complete sides of the equation instead of to select variables.