Why method did early mississippians practice that allowed them to grow their own food?

They practiced growing their food in small gardens using simple tools as in

axes, stones, digging sticks and fires. They depended on corn for food and they cleared and planted fields near towns and villages.

Hope this was able to help you (:

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°