Q7 Calculate the volume of a
sphere with diameter of 4.2mm.

38.79 cu. mm.

Step-by-step explanation:

Volume = 4/3π x r^3

= 4/3π x 2.1^3

= 4/3 x 22/7 x 9.261

= 38.79

38.792 or 38.808

Step-by-step explanation:

Formula for Volume of Sphere = 4 x pi x 1/3 x r cubed

So,

if diameter = 4.2, then radius = 4.2 divided by 2 = 2.1

Now, volume =

4 x 22/7 x 1/3 x 2.1^3 = 38.808

But is you used 3.14 as pi,

then the volume = 38.792

it is a reproduction.

step-by-step explanation:

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680