1 mile = 5280 feet which means the plane is flying at an altidude of 4.5 miles currently other than that refine your question.
√x+9=12
√x=3
(√x)²=3²
x=9 option D
After 7 weeks the plant will 11.25 units tall if the equation for the best-fit line to be y = 2.5 + 1.25x.
<h3>What is the line of best fit?</h3>
A mathematical notion called the line of the best fit connects points spread throughout a graph. It's a type of linear regression that uses scatter data to figure out the best way to define the dots' relationship.

We have a line of best fit:
y = 2.5 + 1.25x
Plug x = 7 weeks
y = 2.5 + 1.25(7)
y = 11.25 units
Thus, after 7 weeks the plant will 11.25 units tall if the equation for the best-fit line to be y = 2.5 + 1.25x.
Learn more about the line of best fit here:
brainly.com/question/14279419
#SPJ1
How is anyone supposed to answer this?
The answer is -12 bc you take away the 3