Is 0.15 – 0.75p equal to –3(0.15 – 0.2 + 0.25p)?

Yes, they are equal

lets see how,

solve the given equation,

–3(0.15 – 0.2 + 0.25p)

Step 1: Inside the bracket solve the similar variables i.e. (0.15 - 0.2)

So it will become,

= -3 ( -0.05 + 0.25p )

Step 2: Multiply each term in the bracket by -3

So it will be,

((-3*-0.05 ) + (-3 * 0.25p))

= 0.15 - 0.75p

Hence 0.15 – 0.75p  is equal to –3(0.15 – 0.2 + 0.25p )

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)