Triangle MNO is transformed to produce triangle PQR. What transformations guarantee triangles MNO and PQR are congruent

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?