a virus is spreading such that the number of people infected increases by 4% a day. initially 100 people were diagnosed with the virus. how many days will it be before 1000 are infected?

For how answer my question this will be the last question can you answer in math subject

Find the value of x in the diagram below. select the best answer from the choices provided

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?