In C, scientific notation is indicated using conversion specifiers %e or %E. True False In C, variables must be declared before they are used. True False In C, trigonometric functions require the argument to be in degrees. True False In C, character data can be represented by constants or variables. Examine the C declaration below. Is the operation valid? char amount = 'M': Yes No What is the output of the following printf() statement? _s represent spaces, and the value of area is 125.6729845. printf("The_area_of_the_rectangle_is_%6.2f ", area): The_area_of_the_rectangle_is_125.67 The_area_of_the_rectangle_is_125 The_area_of_the_rectangle_is_125.7