Please help almost due A submarine is 30 feet below the surface of the water and descends 5 feet deeper every minute. How many minutes will it take for the submarine to be located 325 feet below the surface? Write and solve an equation.

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.

the angles measure to 70 degrees, 70 degrees, 20 degrees, and 20 degrees

the meatpacking industry was most affected by the refrigeration railcar.

the area of the piece of paper =   27- inch square.

so, the length of the square piece of paper = = .

the side of the triangle cut = =

also the side of the small square cut =

so, the area of each triangle cut = 1/2 * .

so, the area of 4 triangles cut =

area of a small square cut =

total area of 4 triangles cut and a small square cut = 6+3 = 9 square inches.

reaming area of the octagonal window   = 27 - 9 = 18 square inches.