What is the product of 2 1/2×3/4

What is the number 321,000,000 in scientific notation? also what is the number? ?

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. find the lateral area for the prism. l.a. = 0123456789

Write an expression that represents the sum of 7 and x