Ronald bought a number of cds for 13$ each. What was the total amount he spent on CDs

Ill mark the brainliest if you me with the these three questions 7,8,9

Aculture started with 2,000 bacteria. after 8 hours, it grew to 2,400 bacteria. predict how many bacteria will be present after 19 hours . round your answer to the nearest whole number. p=ae^kt

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read