Ahot air balloon rises as follows.
height: 6 10 16 22 30
time: 0 02 4 06 08
a) how high was the hot air balloon when it was initially launched?
b) how fast was the balloon rising between 0 and 30 seconds?
c) how fast was the balloon rising between 6 and 8 seconds?

Find the pattern and use it to list the nth term in the sequence. 6, 12, 20, 30, 42, 56, the nth term of the sequence is

The swimming pool is open when the high temperature is higher than 20∘c. lainey tried to swim on monday and thursday (which was 3 days later). the pool was open on monday, but it was closed on thursday. the high temperature was 30∘c on monday, but decreased at a constant rate in the next 3 days. write an inequality to determine the rate of temperature decrease in degrees celsius per day, d, from monday to thursday.

Find the value of the variable and the length of each chord for #5 and #6.