Choose the true biconditional statement that can be formed from the conditional statement "if a natural number n is odd, then n2 is odd" and its converse.

a. n2 is not odd if and only if a natural number n is not odd.
b. a natural number n is odd if and only if n2 is odd.
c. a valid biconditional cannot be formed because the statement and its converse are not logically equivalent.
d. a natural number n is not odd if and only if n2 is not odd.

What is the greatest common factor of 6a, 8a^{2}, and 14?

Afarmer sells 9.5 kilograms of apples and pears at the farmer's market. 4/5 of the weight is the apples and the rest is the pears. how many kilograms of pears did she sell at the farmers market

Now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.