Suppose a white dwarf star has a diameter of approximately 1.8083 x 10 to the 4th power km. Use the formula 4 pie symbol r to the second power to find the approximate surface area of the star.

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

How is the equation of this circle written in standard form? x2 + y2 - 6x + 14y = 142 a) (x - 3)2 + (y + 7)2 = 200 b) (x+ 3)2 + (y - 7)2 = 200 (x - 6)2 + (y + 14)2 = 142 d) (x+6)2 + (y- 14)2 = 142