Step-by-step explanation:

Answer:
Radius
Step-by-step explanation:
The radius is a straight line from the center to the circumference of a circle
The diameter is a straight line, from circumference to circumference, that passes throught a citcle's center
If two parallel lines are cut by a transversal, then each pair of consecutive interior angles is supplementary.
If two parallel lines are cut by a transversal, then each pair of alternate exterior angles is congruent.
If two parallel lines are cut by a transversal, then each pair of alternate interior angles is congruent.
If two parallel lines are cut by the transversal, then each pair of corresponding angles is congruent.
Answer:
1 Stamp = $0.65
Stamps Bought= $158.60/0.65
=244 Stamps
9.3 × 107 would be the scientific notation