10:
Write the following expression as a decimal number.
(0.345 × 109)

A
3,450,000,000
B
345,000,000
C
345,000,000,000

D
34,500,000

E
.345000000000

What is the standard form of -5x^2+2x^4-11+x^3+3x

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

What is the slope of the line that contains the points (-2,1) and (0,-3)