Hi!
So we all know diameter is the width across the circle and radius is half of the diameter.
So since we know what diameter is, that would make #1) AC or the second option
For number two in case you don't know, angles 6 and 7 are vertical angles. Which, are CONGRUENT! YAY! That always makes it so easy! So if angle 6 is 30°, angle 7 will be, YES!! 30°! So easy!
So the answer to #2) 30<span>°</span>, or 4th option!
Hope I helped!
A Rotation is a transformation of a figure by turning it around a given point.
<span>t is the number of teachers and s is the number of students
</span>
<span>The school requires 3 teachers for every 93 students.
</span>
<span>So, 3t = 93 s ⇒⇒⇒ divide by 3
</span>
<span>∴ 3t/3 = 93s/3
</span>
<span>∴ t = 31 s
</span>
The <span>equation represents this relationship is ⇒⇒⇒ t = 31 s
</span>