Quick question. after dividing 30 by 2, do i multiply 15 by 3 or add 3 it to? (for question d) and !

Tessa bought stock in a restaurant for $253.00. her stock is now worth $333.96. what is the percentage increase of the value of tessa's stock? a.) 81% b.) 32% c.) 24% d.) 76%

Aculture started with 4,000 bacteria. after 5 hours, it grew to 5,200 bacteria. predict how many bacteria will be present after 19 hours. round your answer to the nearest whole number.

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?