Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 4 cm per second. Find a function, r(t), for the radius in terms of t. Find a function, V(r), for the volume of the balloon in terms of r. Find (V ? r)(t).
A. (V ? r)(t) = 
B. (V ? r)(t) = 
C. (V ? r)(t) = 
D. (V ? r)(t) = 
Answer: D
Mathematics
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Find the product.(-2m4z4)(5m3z2)
A. -10mz6 B. -10m7z6 C. -10mz7 D. -10m6z7
Mathematics
Solve the problem.Find an equation for the level surface of the function f(x, y, z) = ln
that passes through the point 
.
A. ln 
= 
B. 
= e16
C. 
= e13
D. ln 
= 16
Mathematics
Use the sum/difference identities to simplify the expression. Do not use a calculator.cos 5° cos 40° - sin 5° sin 40°
A. 
B. 
C. - 
D. 1
Mathematics
Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, give the solution with y arbitrary.9x - 7y = -14-7x + 4y = 8
A. ? B. {(-1, 3)} C. {(0, 2)} D. {(0, 3)}
Mathematics