ambu has saved $56 of her allowance money to buy books. if she buys 6 books at d dollars per book, she will have 56 6d of her allowance left. how much does she have left if the books cost $4.75 each?

56 - 6d d=$4.75

56 - 6(4.75) mulitiply 6 by 4.75 and you get $28.50

56 - 28.50 write 56 like 56.00

56.00 - 28.50

=$27.50

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 equivalent expression are always the hardest ones but you look at the gcf also

step-by-step explanation: