The area of a sector of a circle is represented by a=5/18πr to the power of 2, where r is the radius of the circle (in meters). what is the radius when the area is 40π square meters?

r = 12

Step-by-step explanation:

given

A = πr² and A = 40π

Equate the 2 areas and solve for r, that is

πr² = 40π

Multiply both sides by 18 to eliminate the fraction

5πr² = 720π ( divide both sides by 5π )

r² = = 144

Take the square root of both sides

r = = 12

step-by-step explanation:

this woman was an important writer and propagandist during the american revolution. she was a member of the committee of correspondence (in fact the committee was formed in her home) and was an advisor to many of the revolutionary leaders, including george washington and john adams. who was this revolutionary woman?

b

step-by-step explanation:

a difference is the result of subtraction. while each of these expressions has subtraction in it, a difference will be the result when subtraction is the last operation applied in the order of operations for the expression. this means subtraction must be outside of the parenthesis. only b has this.