A ball is thrown in the air from the top of a building. Its height, in meters above ground as a function of time, in seconds, is given by h(t) = - 4.9t2 + 27t + 19. How long does it take to reach maximum height? Round to
the nearest hundredth of a second.
seconds

Which is the standard form for this number? (4 x 1 100 ) + (8 x 1 1,000 ) + ( 3 x 1 100,000 ) ? a) 0.004803 b) 0.04803 c) 0.0483 d) 0.483

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

If y varies directly as x2 and y=6 when x=6, find the constant of variation.