Change 300mm into cm​

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Math each whole number with a rational,exponential expression