Convert to scientific notation. 0.00000000000078432
a) 7.8432×10^13
b) 8×10^-12
c) 7.8432×10^-13
d) 7×10^-13​

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

5x−4≥12 or 12x+5≤−4 can you with this problem