Please help me with these questions

1. How many terms are in the sequence a) 8, 12, 18, ..., 40.5? b) -2, 6, -18, ..., 4374 2. In a geometric sequence, the third term is -50 and the sixth term is 6250. Determine the sequence. 3. Find the sum of the series 16 + 10 + 4 +...+ -50. 4. Find the sum of the series 1200 + 120 + 12 + ... + 0.0012 5. Determine the type of sequence and find an expression for the general term, th, and then use it to determine the indicated term. -19, -19/2, -19/4.... -0352..png energies-11-0352....png Humphrey-and-Br....png 1581655448.png3. Find the sum of the series 16 + 10 + 4 +...+ -50. 4. Find the sum of the series 1200 + 120 + 12 + ... + 0.0012 5. Determine the type of sequence and find an expression for the general term, to, and then use it to determine the indicated term. -19, -19/2, -19/4,... Find t57 MCR 3U - Grade 11 University Exam Review 13 of 15 6. For the series, 3.5 + 3.7 + 3.9 +... a) Find S19 energies-11-0852...png Humphrey-and-Br...png 1581655448.png6. For the series, 3.5 + 3.7 + 3.9 +... a) Find S19 b) 6.3 is also in the series. Which term is it? 7. How many terms are in the series -6 - 18 -54 -..., if the sum is -726? 8. A person's annual salary ranges from $25 325 in the 1st year to $34 445 in the 7" year. The salaries in this range form an arithmetic sequence. a) Determine the raise the person can expect each year. What is the total amount the person will earn in the 7 years? png energies-11-0352....png Humphrey-and-Br...png 1581655448.png2. Sandy lends her buddy $1000 for 5 years and charges him 6% simple interest per year. a) How much interest will Sandy have earned over the 5 years? b) What is the total amount of money that Sandy will be paid back at the end of 5 years? 3. Tim invests $5,000 at 9% per year, compounded quarterly for 4 years. a) Determine the value of the investment at the end of the term, b) Determine the amount of interest earned on the investment. 352....png energies-11-0352...png Humphrey and-Br...png 1581655448.png A