Questions

The atmospheric pressure at the surface of the Earth is due to gravitational pull of the earth and is about 14.7 psi.

That means that the weight of a column of air which has a cross section of 1 square inch and which stretches from the surface of the Earth to space is 14.7 pounds. 

A marketing mix and a promotional mix does have some differences, both being highly crucial for the success of a business. Marketing is very essential for the growth and continuity of business operations. It helps in creating new customers and retaining the existing ones to keep the business ongoing. Marketing focuses on all the elements of the marketing mix viz product, price, place and promotion while promotion focuses more on the customer- how to reach a product to its customers and how to sell it to them ultimately

Except Rock color, all other Graded bedding, Ripple marks and Mud cracks are sedimentary structures.

They walked and did this.

It was never specified that the boat was at sea. Since this logic is observed by them to tackle situation.