What is the rule for the following geometric sequence? 64,128,256,512... a) a_(n) = 64(-2)^n-1
b) a_(n) = 64(2)^n-1
c) a_(n) = 64(1/2)^n-1
d) a_(n) = 64(-1/2)^n-1

B

Step-by-step explanation:

The explicit rule for a geometric sequence is

= a₁

where a₁ is the first term and r the common ratio

Here a₁ = 64 and r = = = 2 , then

= 64 → B

b).

b.) 160 miles on a 5 gallons car

step-by-step explanation:

240/10=24 miles/gallon

160/5=32 miles/gallon

30/1=30 miles/gallon

168/6= 28 miles/gallon

32 miles/gallon is the most amount, so this is the best.

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong