Urgent help plz. The expression -140 + 20m represents a submarine that began at a depth of 140 feet below sea level and ascended at a rate of 20 feet per minute. What was the depth of the submarine after 4 minutes? could you help with the math part too?

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

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Identify the function that contains the data in the following table: x     -2         0         2         3         5     f(x)     5         3         1         2         4     possible answers: f(x) = |x| + 1 f(x) = |x - 2| f(x) = |x - 2| - 1 f(x) = |x - 2| + 1