The sum of the first 3 terms of a G. P. is 21 and that of the last 3 terms is 672. If the first term and the last term of the G. P. are 3 and 384 respectively, find the common ratio and sum of the first 8 terms. G. P. is geometric progression

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

What is the lcm of 16 and 40 ? 24 and 40 ?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)