In δabc, if the lengths of sides a and c are 8 centimeters and 16 centimeters, respectively, and the measure of is 35°, what is the measure of to two decimal places?

16.67°

17.50°

26.57°

35.53°

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.