Use a graphing calculator to approximate the vertex of the graph of the parabola defined by the following equation
Y=x^2+2x+10

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2