A textbook store sold a combined total of 478 biology and history textbooks in a week. The number of biology textbooks sold was 48 more than the number of number of history textbooks sold. how many textbooks of each type were sold

215 history and 263 biology

Step-by-step explanation:

478 - 48 = 430. 430/2 = 215. 215 history textbooks. 215 + 48 = 263 biology textbooks

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)

6x = 48

i hope this . 6 cards each and a total of $48. dvide each side by 6 and you will have your answer.