3. Suppose you are designing a remote control that uses short, medium, or long pulses of
infrared light to send control signals to a
device.
a) How many different control codes can
you define using
i) three pulses?
ii) one, two, or three pulses?

a_n = a_1 + (n - 1)d

the first term is 6.

the common difference d = ?

when you find d, replace n with 7 and d with the common difference to find your answer.

if the rectangular pool has a area of 192 square ft. and length of 15 ft. you must divide 15 into 192. 192 ÷ 15 = about 13 ft.

the scale is 1/9 my friend can't simplify 1 anymore so it will be (for every 1 there's 9)