Awaterfall has a height of 1400 feet. a pebble is thrown upward from the top of the falls with an initial velocity of 12 feet per second. the height, h, of the pebble after t seconds is given by the equation h equals negative 16 t squared plus 12 t plus 1400
h=−16t2+12t+1400. how long after the pebble is thrown will it hit the ground?

If 1 is divided by the sum of y& 4. the result is equal to 3 divided by 4 .find the value of m?

Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so,about which interval is it approximately symmetric?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!