Answer:
Assuming that
is a diameter.
Given that 
And that point O is the center of the circle

Explanation:
Because angle AOB is subtended by arc AB from point O.
Arc AB is equal to the measure of that angle.
Since arc ABC is subtended by the diameter, the arc is 180°.
They will get to 90 feet at <u>half a minute</u> or <u>30 seconds</u>.
This is the isosceles right triangle, the diagonal of a square, the thing that so upset the Pythagoreans. The two sides and diagonal of a square are in ratio
so we get

We could have also gotten this using Trig:


Or by recognizing u=v because remaining angle is 45 so this must be isosceles so



Answer:
1.2%
Step-by-step explanation:
All you have to do is divide 12 by 10 and you get the answer 1.2.