<h3>
Answer:</h3>
95%
<h3>
Step-by-step explanation:</h3>
4 minutes is 4×(60 seconds) = 240 seconds.
The amount of dance time is (240 -12) seconds = 228 seconds.
The percentage of music time spent dancing is ...
... (228 seconds)/(240 seconds) × 100% = 95%
Answer:
The area of the shaded sector is 
Step-by-step explanation:
I assume that the problem is
Find the area of the shaded sector of the circle with radius equal to 16 units
step 1
Find the value of x
we know that
-----> by complete circle


The central angle of the shaded sector is 2x

step 2
Find the area of the circle
The area of the circle is equal to

we have

substitute


step 3
Find the area of the shaded sector
we know that
A central angle of 360 degrees subtends an area of circle equal to 
so
by proportion
Find the area of the shaded sector by a central angle of 72 degrees

Total area AE=23
There are a total of 4 subintervals
soo... Take 23 divide by 4
Answer is 5.75