Calculus question that i really need answered before 12: 30 am tomorrow. answer a, b, and c if you can you.

the water in a fish tank is decreasing at a rate of 2 inches per hour

Rate of change is the derivative

Rate of change in height with respect to time  is 2 inches per hour

so

(a)

unit is feet^2 so its area

the unit of area is always units^2

so da/dt is the rate of change in area with respect to time

(b)

r is the radius

so dr/dt is the rate of change in radius with respect to time

Radius is decreasing at the rate of  40 cm per minute

(c)

v is the volume . the unit of volume is always cubic units

so dv/dt is the rate of change in volume with respect to time

Volume is decreasing at the rate of  10 meter cube per second

hi there! my name is zalgo and i am here to you out today. the answer is pretty simple (in a way). this equation equals to 25.2!

i hope this answer !

"stay and stay proud! " - zalgo

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.