Three of the expressions will give the amount that remains after t years of a certain radioactive substance. Which expression is NOT equivalent to the others?

A) 270e^−0.0577t

B) 270(12)t/12

C) 270(0.944)t

D) 270(13)t/9

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?

9/10 divide by -3/15 as a mixed number

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?