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t = 17 seconds

Step-by-step explanation:

h(t) = -16t^2 + 4624

We want to find the time when the wood hits the ground or when h(t) =0

0 = -16t^2 + 4624

Subtract 4624 from each side

0-4624 = -16t^2 + 4624-4624

-4624 = -16t^2

Divide each side by -16

-4624/-16 = -16t^2/-16

289 = t^2

Take the square root of each side

±sqrt(289) = sqrt(t^2)

±17 = t

Since we cannot have negative time

t = 17 seconds

x > 1.3

step by step:

8.5−0.9x> 9.8−1.9x

step 1: simplify both sides of the inequality.

−0.9x+8.5> −1.9x+9.8

step 2: add 1.9x to both sides.

−0.9x+8.5+1.9x> −1.9x+9.8+1.9x

1x+8.5> 9.8

step 3: subtract 8.5 from both sides.

1x+8.5−8.5> 9.8−8.5

1x> 1.3

step 4: divide both sides by 1.

1x/1 > 1.3/1