Sonia is buying presents for her 3 younger brothers she wants each boy to have 4 toys how many toys will she need to buy . show your work

12

Step-by-step explanation:

she has 3 brothers times 4 toys.

12 toys

Step-by-step explanation:

She needs to buy 4 toys for 3 people. This means (4) + (4) + (4). This can be written as 4 * 3. This is equal to 12. Therefore, she needs to buy a total of 12 gifts.

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)