Length, width and height of a rectangular prism are 2cm,3cm and 4cm respectively. find the surface area of a prism

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

Given the choice between receiving $1.000.000 in one month or a single penny-doubled everyday for the period of one month; which option would you choice? show your work to support your answer. (assume that 1 month=30 days)

Multiply. write your answer in simplest form. 3/8 x 5/7