Draw and label diagrams that show these two methods for calculating 19 * 50. First find 10x50 and then add 9x50.
First find 20x50 and then take away 50​

a and c

step-by-step explanation:

a reflection across the x axis and a 90 degree rotation left and right.

answer:

at time x=0 we have 1000, at time x=1 we have 2000, at time x=2 we have 4000.  

so that's an initial value of 1000 and a ratio of 2,

y = 1000 (2^x)

hope this !