At the start of a basketball game, the referee tosses a ball into the air for the jump ball. The equation that models the height of the ball is h(t) = -16t2 + 30t + 8. During what time interval is the height of the ball above 10 feet? (Round your answer to the nearest tenth of a second.)

Question

anonymous · Answer

they need to vary these questions 
solve 
$$-16t^2+30t+8>10$$
$$-16t^2+30t-2>0$$
$$8t^2-15t+2<0$$

anonymous · Answer

find the zeros.  your answer will be the interval between them

anonymous · Answer

zeros are 
$$\frac{15-\sqrt{161}}{16}$$ and its conjugate 
$$\frac{15+\sqrt{161}}{16}$$

anonymous · Answer

use  a calculator to find the decimal approximation if that is what you need

anonymous · Answer

from .1444 to 1.73 rounded

anonymous · Answer

thank you