Find sec x if tan^2x=1/2

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Multiply. write your answer in simplest form. 3/8 x 5/7

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same