3.6 * 10^(-3) is the scientific notation
I think #4 is 4 but I'm not completely sure
Y intercept occurs when x = o so it is -2(0-3) + 4 = -2
x intercepts:-
-2(x - 3)^2 + 4 = 0
(x - 3)^2 = -4/-2 = 2
x - 3 = +/- sqrt2
x = 3 + sqrt2 and 3- sqrt2
To solve the negative exponents , we have to apply the negative exponent rule or the fractional exponent rule.
<h3>How are
negative exponent calculated?</h3>
To calculate the negative exponent we need to remember about the negative exponent that the base is on the opposite side of the fraction. Here , We need to flip the fraction so that the base will be on the other side.
Negative exponent Rule :-

Now , we will solve a fraction with negative exponent
For example ; Simplify the fraction 
Solution : 
= 9
Here, 9 is the answer of the above example.
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Answer: Answer for 27 , It dropped 38 feet, (down) so -38 feet
Answer for 28, The difference between 4 and -7 is 11
Step-by-step explanation:
25 + 13 = 38 (but it was going down so its negative)
4 + 7 = 11