The descent after 16 seconds would be 672 feet, with the function -42•X and X=16 so -42•16=-672
The desired number is the difference between the number of messages sent by the 16th day and the number sent by the 9th day:
... n = t(16) - t(9)
... n = (40×√16) - (40×√9)
... n = 40×(4 - 3) = 40
40 text messages were sent between the ninth and sixteenth day of the month.
The answer is in the image:
Answer:
s to the power of 3
Step-by-step explanation:
