Math Help Please help as soon as possible

Question

1. For an arithmetic sequence, t₅₂ = 47 and t₁₀₃ = 302. Find a, d and t_n(general term)
2. For a geometric sequence, t₁₀ = 137 781 and t₁₉ = 2 711 943 423. Find a, r and t_n (general term)
3. Mr. Griffith has a problem with weeds in his backyard. He is trying to get rid of the dandelions and has found an organic herbicide that will not pollute the earth or be unhealthy for his family. If he starts the process with 250 weeds, and the herbicide kills 30% of the weeds with each weekly application, how many weeds will be left after 6 applications?
4. Drake was supposed to be performing at the Scotiabank Centre in a week and a half. The first row of one of the sections has 19 seats, and the number of seats increases
5. a.) Ray and Tre were going to the concert and their seats were in the 12th row of this particular section. How many seats are in their row?
6. b.) If there are 24 rows of seats, how many people are sitting in this entire section?
7. Mitchell will be working at a children’s music camp for the summer, hosted by ‘Math Music Inc.’. He is getting paid a flat amount of $4000, but can also make an additional $125 for every child that signs up who says he/she heard about the company through Mitchell. How much money will Mitchell earn this summer if he recruits 27 kids for the music camp?
8. Extra Question Help: If a number is multiplied by each term of an arithmetic sequence, is the resulting sequence still arithmetic?
9. Determine the next three terms for the sequence t₁ = 5, t₂ = 3, t_n = t_n-2 + t_n-1 - 2n

Answer 1

tn= t1+d(n-1)= -208+5(n-1)