Please help

Which equation is equivalent to 2^4x- 8^x-3?
O 2^4x - 2^2x-3
O 2^4x - 2^2x=6
O 2^4x - 2^3x-3
O 2^4x - 2^3x9

Idont get this question can someone me solve it? ** the distance light travels in one second (1 light second) is about 1.86 ×10^5 mi. saturn is about 475 light-seconds from the sun. about how many miles from the sun is saturn..my guess is 8.83* 10^7 you so much

The triangles in the diagram are congruent. if mzf = 40°, mza = 80°, and mzg = 60°, what is mzb?

Hi, can anyone show me how to do this problem? 100 points for this. in advance