How do bonds buy “freedom”?

Freedom shares are original issue discount bonds issued by the U.S. Treasury from May 1967 to October 1970 with a 30-year maturity. They also are known as savings notes.

Explanation:

angle a = 40.6°

step-by-step explanation:

for any right angle triangle we know the pythagoras theorem reveals

hypotenuse² = height²+base²

by this formula we will calculate the length of hypotenuse

h² = 6²+7²

⇒ h =√36+49 = √85 = 9.22

now from the given triangle sin a = height/ hypotenuse

                                                sin a = 6/9.22 = 0.651

therefore

so angle a = 40.6°