We know that
a1=1
a2=3
a3=9
a2/a1=3/1----> 3
a3/a2=9/3----> 3
<span>common ration r is equal to 3
number of terms n is 12
The </span><span>Sum of geometric series is given by the formula
</span>Sum=a1*[1-r<span>^n]/[1-r]
</span>Sum=1*[1-3^12]/[1-3]-----> Sum=[1-3^12]/[1-3]----> [3^12-1]/[3-1]
<span>Sum=531440/2-----> 265720
the answer is
265720
</span>
Answer:
D is right
Step-by-step explanation:
Answer:
136 GLASSES
Step-by-step explanation:
THERE ARE 40 CUPS IN 2.5 GALLONS
THERE ARE 36 CUPS IN 2.25 GALLONS
THERE ARE 60 CUPS IN 3.75 GALLONS
SO {40+60=100
100+36=136
