The temerature outside is dropping three degrees per hour. whats an expression that represents the total change in temperature after eight hours?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²