I'm so lost on d please help

Explanation:

As you found earlier, m = (T/(2π))² k.

So as T and k both increase, m increases.  As T and k both decrease, m decreases.

So we can build a table and calculate m for each case assuming the extreme scenarios.  In other words, we'll increase k by 10% and T by 0.007 s, then calculate the maximum m.  Then, we'll decrease k by 10% and T by 0.007 s, then calculate the minimum m.

After we build the table, we see that the experimental range is 0.475 ≤ m ≤ 0.576.  This interval contains the true value of m, 0.500.  

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).