A cone is to be built from stone so that it has height 12 feet and a base with radius 4. (The base of the cone will lie on the floor.) Suppose the density of the stone used to make the cone is 70 lb/ft3. Calculate the work required to build the cone from the ground up.

50- 250 is correct i did that one too

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.

your answer would be 12