A conveyor belt is dumping sand onto a conical pile at a rate of 19 cubic feet per minute. The coarseness of the sand is such that the cone maintains a height that is one-fifth that of the radius. How fast is the height of the pile increasing when the pile is 4 feet high? Please show all steps!

.25

step-by-step explanation:

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

answer: 1inch=7days  

12inch=12*7=84days

step-by-step explanation: