F (x) = -7x+4

What is the value of
f (2)

f(2) = -10

Step-by-step explanation:

Using the function of F(a) you plug a into where x is.

So f(2) is where x=2 therefore f(2) = -7(2) +4

-14 +4 =10

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)