Bachelor level
1) jamie goes to the fair and pays an entrance fee of $10. she buys 15 tickets to spend in the
tair. write an expression that represents the total cost of entering the fair and buying the
tickets if each ticket costs $t. evaluate your expression if each ticket costs $1.25.
expression:

1+1=22×1=22-1=11-1=1duh

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.