A certain radioactive material decays at a continuous rate of 4% per year. If the initial mass is 195 grams, how much of the mass remains after 45 years? You may use the formula A(t)=A↓0e^k*t where A(t)is measured in grams.

The mass that remains after 45 years is grams.
Round answer to 1 decimal place.

Evaluate cos2θ for cosθ = square root of 3/2

Angle xyz is formed by segments xy and yz on the coordinate grid below: a coordinate plane is shown. angle xyz has endpoints at 3 comma negative 1 and 6 negative 2 and 3 comma negative 3 and measures 36.87 degrees. angle xyz is rotated 270 degrees counterclockwise about the origin to form angle x′y′z′. which statement shows the measure of angle x′y′z′?

Which expression is equivalent to -5(3x - 6/7)