43. Social Security benefits The following figure gives the monthly Social Security benefits for persons whose
benefit would be $1000 at a full retirement age of 66 as
a function of the age these beneficiaries start receiving
benefits. The figure shows the benefits, y = f(x), as a
function of x, for 62 SX $ 70.
(a) Find f(64) and f(67).
(b) Find f(68) and give its meaning,
(e) Find f(66) - $(62) and gives its meaning.
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Which property is illustrated by the following statement? if hxa rgi, then rgi hxa.

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school. each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220