<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: second option.
Step-by-step explanation:
By definition, you know that:

You can see in the graph that the interception with the y-axis is at -1.
Therefore, in that point: x=0 and y=-2
Substitute into the function and solve for a:

Now, choose any point of the function and substitute this point and the value of a into the function and solve for b. Then you obtain:
Point (2,-4)

428.85 because value= initial value × multiplier^(no of years)
Multiplier=100-0.6
99.4÷100
=0.994
Value= 450 × 0.994^8
=428.847.....
They made 27 dollars less.
-2y^2 + 6y + 2 = 0
a = -2, b = 6, c = 2
x = (- b + - sqrt(b^2-4ac))/(2a)
x=(-6+-sqrt(36-4*-2*2))/-4
x=(-6+-sqrt(36+16))/-4
x=(-6+-sqrt(52))/-4
x = (-6 +- 2sqrt13)/-4
x = (3 + - sqrt13)/2