Write the standard equation of a circle with center (−9, −4) and radius square root of 5 .

(x – 4)2 + (y – 9)2 = 5

(x – 9)2 + (y – 4)2 = 5

(x + 4)2 + (y + 9)2 = 5

(x + 9)2 + (y + 4)2 = 5

The answer is the 4th, . When it comes to circle and plugging it into an equation, you flip the signs (I know, the trickery) so if it is positive 9 it would be negative 9 in the equation.

i am sorry it just submitted an answer but the answer is 365 boys. hopes this

step-by-step explanation:

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)