Write expressions that are equivalent to...

Expressions A, B, and D

Step-by-step explanation:

Expression A works because anything to the power of 0 is equal to one. Therefore, 1/1 = 1.

Expression B works because a negative number that is put to an even-numbered power will end up being positive. Therefore, -1*-1*-1*-1 = 1.

Expression C does NOT work because a negative number that is put to an odd-numbered power will end up being negative (-1*-1*-1*-1*-1*-1*-1 = -1).

Expression D works because positive 1 put to any power will end up being 1, for 1 times itself will end up being 1. Therefore, (you get the idea).

Expression E does NOT work because a number put to a negative power will end up becoming a fraction. 13^-1 is the same thing as writing 1/13. Therefore, 1/(1/13) will equal 13.

Hope this helps!

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft