What is the 22nd term of the arithmetic sequence where a1 = 8 and a9 = 56 ?

Which statements about these triangles is true

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.