The first unit of production takes 20 hours to produce and the learning rate is expected to be 90 percent. how long will it take to produce the twelfth unit? less than or equal to 11.0 hours greater than 11.0 hours but less than or equal to 13.0 hours greater than 13.0 but less than or equal to 15.0 hours greater than 15.0 hours

I'll give brainliest if you answer right : )

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %