Acar park has room for 135 cars on each level. there are 20 levels. how many cars can park there altogether? (show all working out) answer within 20mins! plz!

What is the value of the expression below? (81^2)^1/8

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

The evening newspaper is delivered at a random time between 5: 30 and 6: 30 pm. dinner is at a random time between 6: 00 and 7: 00 pm. each spinner is spun 30 times and the newspaper arrived 19 times before dinner. determine the experimental probability of the newspaper arriving before dinner.