Here you are . i think thais is the asnwer
The arithmetic sequence of 161,147,133,119
Compute the general progression formula of 161,147,133,119 d=-14, a↓n+175
Compute ᵃ₂₂ = -133
An exponential equation can be written from its description using the form
... y = (reference value)·((later value)/(reference value))^((t - (reference time))/(later time - reference time))
Here, we have
... reference value = 220; reference time = 2; later value = 880; later time = 4
so we can write the exponential equation as
... y = 220·(880/220)^((t-2)/(4-2)) = 220·4^(t/2 -1) = 55·2^t
Then for t=10, the expected number is
... y = 55·2^10 = 56,320
Well, surface area is 4 * pie *r^2
and volume = 4/3 * pie * r^3
so, 600 = 4 * 3.14 * r^2
r^2 = 47.77
r=6.91
v = 4/3 * 3.14 * 6.91^3 =1381.979 cm3
hope it helepd
