Which one of the following statements provides the most convincing evidence that electromagnetic waves have a transverse character?

Consider the expression . In this expression  a > o and b < 0.  Which of the following statements is true?  The quotient is positive.  The quotient is negative.  The quotient is zero.  It's impossible to tell. 

Given the expression:

62 is 21% of what number? 

Convert to a decimal. 

The distance to the Avenue H station to the last stop on the bus line is 25 miles. There are stops. How many miles per stop are there? 

A rectangular tabletop has a length of 90 cm and a width of 41 cm. Find the perimeter and the area of the tabletop. This problem should have two answers and follow the format requested to receive full credit. Your answer for perimeter should be in the form: ________ cm. Your answer for area should be in the form: _____ sq. sm. 

Joan can mow a 20-acre field is 7 hours. How long would it take her to mow a 7-acre field? 

Convert feet to inches.    There are 12 inches in a foot. 

I understand that I may lose points on my responses if those responses are not in the requested formats.