So the pattern is x,y so the left is x and the right is y. Just graph it
use the quotient rule then after using it the first time use it again on your resulting equation, since you are looking for the second derivative
It gives function: h = -16t^2 + 40
water is when height is 0 so solve for 0= -16t^2 + 40
subtract 40 from both sides: -40 = -16t^2
divide by -16: -40/-16 = t^2
simplify: 5/2 = t^2
square root both sides: 1.58 = t
the orange hits the river in 1.58 seconds.
Answer:

or

Step-by-step explanation:
Divide the numerator and the denominator by the same number:

or
Multiply the numerator and the denominator by the same number:
