A deep sea hydrophone began recording for 180 seconds as soon as it sensed a sound greater
than the threshold intensity of 200 underwater decibels (dB). The sound intensity, I, in dB
reached a maximum at 60 seconds after recording and then gradually decreased for the next
120 seconds. If t is the number of seconds since the beginning of recording, which of the
following graphs in the tI-plane could model the sound?

complete the steps to find the area of the trapezoid.

area of rectangle = 256   square units

area of triangle 1 = 24  square units

area of triangle 2 = 16  square units

area of triangle 3 =   96 square units

area of trapezoid = 120  square units

step-by-step explanation:

what are you doing do you need examples of variable questions?

step-by-step explanation:

5a-1=9               bring the one over the =

5a=10                     divide by your variable

a=2

brainliest? ?

here try this one

3a-24=0