The following diagram shows a right-angled triangle, ABC, where CosA=5/7 (a) Show that SinA=sqrt24/7
(b) Find cos 2A

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

Which is the focus of a parabola with equation y2=4x