Hi boys can you me will mark !
factor completely.

5x^2 - 45

a.

5(x + 3)(x - 3)

b.

5(x2 - 45)

c.

5(x - 9)(x + 9)

d.

(5x + 9)(x - 5)

The answer is A.

Hope this helps.

A.

Step-by-step explanation:

I am joyous to assist you anytime.

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)

the answer is mp

step-by-step explanation: