The answer is B. your at -3, and add 4 more to -3, would make it -7
do you mean the equivalent fractions?
If so,The equivalent fractions of 4/5 are 8/10, 12/15, 16/20
I hope this is what you mean.
A: -5-(-13) = 8
b: -4-8 = -12
D: a^8 b^12
First find the volume of the pipe:
V = 3.14*length*(outsideradius^2 - innerradius^2)
= 3.14 * 10*(2.5^2 - 2^2)
= 70.65 cm^3
Now find the mass using the formula density = mass / volume:
Mass = volume * density
= 70.65 cm^3 * 0.92g/cm^3
= 65 grams
