7. What was the purpose of the Central Intelligence Agency (CIA) and the National Security
Council (NSC)?

The NSC was one of several creations of the National Security Act of 1947, which also established the Central Intelligence Agency and placed the armed forces under the Secretary of Defense.

Explanation:

The Act gave the NSC congressional mandate to coordinate U.S. foreign and defense policy.

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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°