Simplify each expression. 1. 92
1 answer:
Answer: 81
Concept:
When a number is being squared, to being put to any power, it means the number multiplies itself by the amount of times indicated by the exponent.
For example, if 3 is to the 3rd power, then it would appear to be 3 × 3 × 3.
Solve:
<u>Given</u>
9²
<u>Simplify exponents</u>
=9 × 9
<u>Simplify by multiplication</u>
=
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Answer:
Step-by-step explanation:
We know that the equation that models the height of the ball as a function of time is .
Where the initial speed is 80 feet.
When the ball lands on the ground, its height will be .
So to know how long it will take the ball to reach the ground, equal h (t) to zero and solve for t.
To solve this quadratic equation we use the quadratic formula.
For an equation of the form:
The quadratic formula is:
In this case
Then
We take the positive solution