The probability, p, that a person responds to an advertisement can be modeled by the exponential function p = 1 – e^-0.047t. in the formula, t is the number of days since the advertisement first appeared. what is the probability that a person has responded after 20 days?

a.20.9%
b.45.3%
c.60.9%
d.98.5%

Find the x-intercept and y-intercept of the line. 3x + 5y = −15

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?

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia