√20 = 4.47213
√20 = 4 (nearest integer)
√20 = 4.5 (nearest tenth)
Expand f(z) into partial fractions:

Recall that for |z| < 1, we have the power series

Then for |z| > 2, or |1/(z/2)| = |2/z| < 1, we have

So the series expansion of f(z) for |z| > 2 is




Answer:
The speed of sound is 
Step-by-step explanation:
Let
x-----> the speed of sound
we know that

so

solve for x

Answer:
$65 is the original price
Step-by-step explanation:
65 x .8 = 52 which is 13 off
3/10 =2/x
3x = 20
x = 6.66
3/10 = 2/6.66
0.3 = 0.3
true