Put these scenarios into a Category: Linear, Exponential, Or Neither

1- If the half-life of a substance is 2 days, what is the amount of the substance left at the end of 4 days?

2- The altitude of a hot air balloon and time when the hot air balloon takes off at 7500 feet above sea level and rises 180 feet every minute.

3-The cost of the rental space is $780 and the price per person for food is $9.75

4-The distance driven and total cost when a taxi driver charges $3 for the first mile and $2 for each additional mile.

5-The number of bacteria and time when a culture of 5000 bacteria is reduced by 50% every two hours.

6-The volume of a landfill and time given that the volume triples every five years.

X/y + 4y/x divided by x/y - 2y/x explain as in depth as you can how you simplfied the fractions. i don't know where to start on this : /

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below. trans typ./ check no. date description of transaction payment/ debit deposit/ credit (+) balance 1,200 00 324 10/6 miller's food market 45.87 45 87 groceries 1,154 13 325 10/7 cyber center computer outlet 218.59 218 59 monitor 935 54 326 10/9 sandy's beauty salon 30.00 30 00 haircut and styling 900 59 deposit 10/10 paycheck 621.33 621 33 1,621 92 evaluate leslie's check register. a. leslie did a good job. everything is correct. b. the final balance is wrong; she did not add everything correctly. c. leslie should have written debit instead of deposit for the transaction type. d. leslie switched the debit and credit columns.

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work: