12. The figure below is composed of equilateral triangle ABC and rectangle ACDE. The length of AB is
perimeter of figure ABCDE, in miles?
15 miles. The ratio AC to EA is 1 to 3. What is the
E
Ale1548
D
С
E. 45
G. 60
H. 90
J. 135
K. 150

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.