Find the mass of a hollow sphere of copper having internal and external diameters of 11.8cm and 12cm respectively ,given the mass of 1c of copper is 8.88g

394.86 grams

Step-by-step explanation:

Volume of the outside shell

r = d/2 = 12 cm/2 = 6cm

V = (4/3) pi * 6^3

V =  4/3 * 3.14 * 216

V = 904.32

Volume of the inside shell

r = d/2 = 11.8/2 = 5.9

V = 4/3 * pi * r^3

V = 4/3 * 3.14 * 5.9^3

V = 859.85

Difference in volume

V_d = 904.32 - 859.85

V_d = 44.47

Mass of sphere

44.47 * 8.88 = 394.86 grams

the answer is 200

step-by-step explanation:

the way the question is worded, it seems to imply the $264 interest is simple interest, not compound interest.

the simple interest for 2 years is $264; the simple interest for 1 year is $132.

$132 interest on a $600 investment means an interest rate of (132/600)*100 = 22%.

the value of $200 at 22% interest compounded annually for three years is

200%281.22%29%5e3

the amount of interest is that value, minus the original $200.

step-by-step explanation:

which of the following statements correctly describes the expression below based on its degree and number of terms?

314 - 7x2 + 11