Asap. find the first, fourth, and eighth terms in the sequence. (a( n )=-2*5^n-1 a) -2; - 250; -156,250 b) -10; -1,000; -10,000,000 c) 0; -250; -156,250 d) -10; -1,250; -781,250 write a rule for a geometric sequence that has negative 6 as its first term and a common ratio of 2. what is the tenth term of this sequence?

What is the greatest number of parts of a circle that can be formed by cutting the circle with 7 straight cuts? (note: the parts do not have to be equal in size)

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

Xy x xy if a and b are positive integers such that a*b=9 and b*a=72 what is the value of a/b