This is a geometric sequence with common ratio (r) = 2.
an = ar^(n - 1)
a4 = a(2)^(4 - 1) = a(2)^3 = 8a
8a = 80
a = 80/8 = 10
7th term (a7) = 10(2)^(7 - 1) = 10(2^6) = 10(64) = 640
Answer:
Each pencil cost $0.51
Step-by-step explanation:
<span>Read the problem entirely.
Get a feel for the whole problem.
List information and the variables you identify.
Attach units of measure to the variables (gallons, miles, inches, etc.)
Define what answer you need, as well as its units of measure.
Work in an organized manner. ...<span>Look for the "key" words (above)</span></span>
Answer:
the total cost of the bike including modifying cost is $24,150
Step-by-step explanation:
⇒ bike cost: $21,000
⇒ 15% of $21,000 is 0.15 x 21,000 = 3,150
⇒ initial + additional cost: $21,000 + $3,150 = $24,150
AND WELCOME TO BRAINLY!!
