Solving a word problem using a quadratic equation with irrational roots. A ball is thrown from an initial height of 7 feet with an initial upward velocity of 21/fts. The ball's height h (in feet) after t seconds is given by the following. h=7+21t-16t²

Find all values of t for which the ball's height is 13 feet.

Round all answer(s) to the nearest hundreth

How do your peer relationships affect your overall health status? what can you do to improve your peer relationships?

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.