The purpose of the 1963 March on Washington was to a. encourage the participants in the Freedom Rides.
b. show that many people endorsed the Voting Rights Act.
c..protest the violent tactics police used in the South.
d. show support for President Kennedy’s civil rights bill.

d

Explanation:

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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°

the constitution gives congress the power to regulate commerce "among" the several states.