A construction worker drops a tool from the top of a building that is 455 feet tall. The function h=-16t^2+455 gives the height at any time t seconds. What is the domain?

If sin θ=24/25 and 0 less than or equal to θ less than or equal to π/2, find the exact value of tan 2θ. answers; a) -527/336 b) -336/527 c)7/24 d) 24/7

Anyone know? will mark brainliest if you're correct!

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers