If a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet per second, then its height h after t seconds is given by the equations h(t) = -16t squared + 128t (if air resistance is neglected).

How long is the rocket in the air?

8 seconds

Step-by-step explanation:

Just use the quadratic equation, but remember, use only positive answer(s). Time can't be negative.

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85.3-64 = 21.3

so laura has already added 85.3 grams of chocolate powder and she has gone over the amount specified in the recipe by 21.3 grams

hope i ! have a great  day!