Perform the indicated operation. kyz * 1/kyz answer choices is 0 1 and k^2 y^2 z^2

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

Simplify the expression 10/11(22z) + (a+5) -1

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters