Answer:
360°
Step-by-step explanation:
From the figure attached,
R, S, T and Q are the points on a circle O.
Since, "measure of an arc of a circle is equal to the measure of the angle subtended by the arc at the center."
By this statement,
m(major arc RQ) = m(∠QOR)
Now 
+ m(major arc RQ) = 
Since sum of all angles at a point = 360°
+ m(major arc RQ) = 360°
D=4(9-c) and d=2(9+c)
d=36-4c and d=18+2c
Since d=d
18+2c=36-4c add 4c to both sides
18+6c=36 subtract 18 from both sides
6c=18 divide both sides by 6
c=3
So the speed of the current is 3mph
Answer: 27.52
Step-by-step explanation:
Just plug in the 30° into that equation.
<span>A(30°) = 16sin(30°)(cos(30°) + 1) </span>
<span> = 16(1/2)(1 + √3/2) </span>
<span> = Approx 14.9 in² </span>
<span>So A is the answer. </span>
