Answer:
It takes 2.8 seconds for the ball to fall 215 ft.
Step-by-step explanation:
We are given a position function s(t) where s stands for the number of feet the ball has fallen, so we have to replace s with the given value of 215 ft and solve for the time t.
Setting up the equation.
The motion equation is given by

We can replace there s = 215 ft to get

Solving for the time t.
From the previous equation we can move all terms in one side to get

At this point we can solve for t using quadratic formula.

where a, b and c are the coefficients of the quadratic equation

So we get

Replacing on the quadratic formula we get

Using a calculator we get

Physically speaking the only result that makes sense is to move forward in time that give us t = 2.8 seconds.
We can conclude that it takes 2.8 seconds for the ball to fall 215 ft.
Answer:
11
Step-by-step explanation:
Step 1:
( 9 - 3 ) + 20 ÷ 4 Equation
Step 2:
6 + 20 ÷ 4 Subtract
Step 3:
6 + 5 Divide
Answer:
11 Add
<u>PEMDAS:</u>
<u>1. Parenthesis</u>
<u>2. Exponents</u>
<u>3. Multiplication</u>
<u>4. Division</u>
<u>5. Addition</u>
<u>6. Subtraction</u>
<u />
Hope This Helps :)
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Since x can be any value as long as the denominator equals 0 (it doesn't matter if it's positive or negative), we have to figure out when x^2=0, which is when x=0. Therefore, the domain is (-inf, 0) U (0, inf)
I got the last answer.
Y = 2x - 2