4. A spherical snowball is melting in such a way that its volume is decreasing at a rate of 2 cm / min. At what rate is the radius changing when the radius is 7 cm? [The volume of a sphere is given by
V = r.)
1
A. - -cm/min
72
1
B.
-cm/min
by to
4977
C.
1
cm/min
9870
D.
1
cm/min
1967
E.
1
-cm/min
987

step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

sadsdda

step-by-step explanation: