Geometric progression + power - math problems
Number of problems found: 10
- Three members GP
The sum of three numbers in GP (geometric progression) is 21 and the sum of their squares is 189. Find the numbers.
- What is 10
What is the 5th term, if the 8th term is 80 and common ratio r =1/2?
- Rate or interest
At what rate percent will Rs.2000 amount to Rs.2315.25 in 3 years at compound interest?
- What are 2
What are the two more terms of the GP a, ax, ax2, ax3, __, __?
- If the 3
If the 6th term of a GP is 4 and the 10th is 4/81, find common ratio r.
If the product twice price cut by 25%, what percentage was price cut in total?
- Sum of GP members
Determine the sum of the GP 30, 6, 1.2, to 5 terms. What is the sum of all terms (to infinity)?
- Future value
Suppose you invested $1000 per quarter over a 15 years period. If money earns an anual rate of 6.5% compounded quarterly, how much would be available at the end of the time period? How much is the interest earn?
- The half life
The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 145 grams of a radioactive isotope, how much will be left after 3 half-lives?
- Present value
A bank loans a family $90,000 at 4.5% annual interest rate to purchase a house. The family agrees to pay the loan off by making monthly payments over a 15 year period. How much should the monthly payment be in order to pay off the debt in 15 years?
Geometric progression - math word problems. Power - math word problems.