The answer for the first picture is 648π or 2034.72
I got the answer using the formula πr squared times the height
so π9squared x 8

The required equation is :

Now, let's find the required values :
period (p) = 6
[distance between any successive Crest or trough]
a = - 4 (flipped)
b = 2π/p = 2π/6 = π/3
k = -2
Distance of starting position from origin = k
Now, plug in the values ~

$135
First, change the mixed number to an improper fraction.
2 1/4 = 9/4
Next, change $60 to an improper fraction.
$60 = 60/1
Then, multiply straight across on both the top and bottom to get 540/4.
Finally, simplify and get 135.
Hope this helped :)
5.2 is the y-intercept of the regression line 5.2 + 13.5x
Answer:
60 cents
Step-by-step explanation:
10x + 5(x+6)
15x = 30
x = 2
plug this back in the equation
20 + (5 x 8) = 60