Which expression is equal to 2x15

Issof claims that the scale factor is 1/2. which statement about his claim is correct

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers