Mammals account for about 1/10

of all vertebrates. Birds account for about 1/6,
Of all vertebrates. Together, what faction of vertebrates is made up of mammals and birds?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

Is the number 128.439 a rational number

How many and of which kind of roots does the equation f(x)=x3−x2−x+1