A body is projected in a vertical direction. The altitude y is given by
`y=10t^(2)-9t+5`
Calculate the initial velocity of the body.

Explanation

To find the initial velocity of the body projected in a vertical direction, we start with the given altitude equation:

\[ y = 10t^2 - 9t + 5 \]

### Step-by-Step Solution:

1. **Understand the Problem**: We need to find the initial velocity of the body. The initial velocity is defined as the velocity of the body at the moment it is projected, which corresponds to \( t = 0 \).

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