Express 18 1/2 in simplest radical form

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

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

Which rational number could be graphed between -4 and -5