Please help i am offering a lot of pts. 1. A retired couple plans to supplement their income with monthly withdrawals of the interest earned on a retirement account which has a balance of $200,000. If the fund earns interest monthly at an APR of 6%, which the couple withdraws from the account, how much is generated each month? Round/take your answer to the nearest cent.

2. Suppose you have estimated that you will need $2,500 per month in your retirement to meet your expenses and live comfortably, and that you have found or chosen a fund (account) which pays a monthly interest of 4% APR. What principal, or balance, will your account need to maintain in order to be able to pay you this amount each month? Round/take your answer to the nearest cent.

Submarines control how much they float or sink in the ocean by changing the volume of air and water contained in large ballast tanks. when the tanks are completely full of water, the submarine increases its overall mass and sinks down to the bottom. when the tanks are completely full of air, the submarine reduces its overall mass and floats to the surface. depending on the density of the seawater surrounding the submarine, it will pump seawater in or out of the tanks in order to achieve the same overall density as the sea water and float neutrally in the water. the volume of the submarine never changes. when the tanks are completely full of water, a submarine with a volume of 7.8\times10^3\text{ m}^37.8×10 3 m 3 7, point, 8, times, 10, start superscript, 3, end superscript, space, m, start superscript, 3, end superscript has a total mass of 8\times10^6\text{ kg}8×10 6 kg8, times, 10, start superscript, 6, end superscript, space, k, g. the density of the seawater is 10^3\text{ kg/m}^310 3 kg/m 3 10, start superscript, 3, end superscript, space, k, g, slash, m, start superscript, 3, end superscript. to make that submarine float neutrally, and neither float nor sink in the ocean, what volume of water does that submarine need to subtract from its tanks?