So you maybe know that

. Now let us try to simplify the expression

Answer:
9 seconds
Step-by-step explanation:
The complete question is
The altitude of an object, d, can be modeled using the equation below:
d=-16t^2 +vt+h
from the edge of a 486 foot cliff, Peyton shot an arrow over the ocean with an initial upward velocity of 90 feet per second. In how many seconds will the arrow reach the water below?
Let
d ----> the altitude of an object in feet
t ---> the time in seconds
v ---> initial velocity in ft per second
h ---> initial height of an object in feet
we have

we know that
When the arrow reach the water the value of d is equal to zero
we have



substitute the values and solve for t


Multiply by -1 both sides

The formula to solve a quadratic equation of the form
is equal to
in this problem we have
substitute in the formula
the solution is t=9 sec
see the attached figure to better understand the problem
Answer:
Angle D is 45 degrees. The side length is 9 in.
Step-by-step explanation:
In a rotation, side lengths and angles do not change.
Answer:
Step-by-step explanation:

An outglier is a data item which is much bigger/smaller than other data items.
The data item arranged is 0.7, 3.1, 4.3, 5.2, 5.3, 5.4, 5.6, 5.8
From the data 0.7 is much smaller than other data items.