Energy and mass are related by the formula e = mc^2
m is the mass of the object.
c is the speed of light
which equation finds m, given e and c?

m = e - c^2
m = ec^2
m = c^2/e
m = e/ c^2

The triangle shown has a hypotenuse with a length of 13 feet. the measure of angle a is 20 degrees. and the measure of angle b is 70 degrees. which of the following is closest to the length, in feet, of line segment ac? no need to use a calculator to find the trig numbers. each function is listed below. 4.4 5 12.2 35.7