Abc=40 and bd is the angle bisected of abc

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

If square root x = -7, then x= -49 true or false

(01.02 lc) angle abc has point e on ray ba and point d on ray bc. points e and d are equidistant from point b. to bisect angle abc, which of the following needs to be identified for the construction? the distance between points e and d the point in the angle that is equidistant from points e and d the endpoint of rays ba and bc the point outside of the angle that is equidistant from points e and d