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 + 16t + 13.
How long does it take to reach maximum height?

When adding 43.8 to a certain number, the sum is 46.59, as seen below. what number should go in the box to complete the addition problem? the decimal 43.8 is added to an unknown whole number and 79 hundredths to equal 46.59. numerical answers expected! answer for blank 1: