Step-by-step explanation:
in a geometric sequence there is a constant factor x that is multiplied with every previous term to create the next one.
a2 = 20
a5 = 1280 = a2×x×x×x = a2×x³ = 20x³
64 = x³
x = 4
=> a1 = 5
therefore
an = an-1×4 =

n > 1
Answer:
10
Step-by-step explanation:
Divide 2 2/4 cups of raisins by 1/4 cup:
10 cups
-------------
4
=============
1 cup
--------
4
Invert the divisor and then multiply:
10 cups 4
------------- · ---------- = 10
4 1 cup
Julie must measure out 10 of these 1/4-cup measures (of raisins).
I guess that is 1:10
Hope ur help !;(
So he worked 30.5 hours, he just didn't write some of the hours down. To find the hours he didn't write down, you subtract 8+

+

from 30.5, which equals