A ball is thrown downward with an initial velocity of 35 meters per second from a cliff that is 130 meters high. The height of the ball is given by the quadratic equation: h=-4.9 t^{2}[/tex]-35t+160 where h is in meters and t is the time in seconds since the ball was thrown. After how many seconds will the height of the ball be 30 meters? WILL GIVE BRAINLIEST!

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Choose the number sentence that shows the identity property of addition. a. 122 = 61 + 61 b. 62 = 1 + 61 c. 61 = 0 + 61

Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?