Answer:
The sum of the first 5 terms is -244
Step-by-step explanation:
To calculate the sum of the geometric series, we need the first term, the common ratio and the number of terms we would like to sum.
The first term here is -4
The common ratio is T2/T1 or T3/T2 = 12/-4 = -3
number of terms n = 5
The formula to use is;
Sn = a(1-r^n)/(1-r)
Plugging these values, we have;
Sn = -4(1-(-3)^5)/(1-(-3))
Sn = -4(1+243)/4 = -1(244) = -244
A is not a possible value.
B-D make more sense than A.
Answer:
1.28!
Step-by-step explanation:
hope this helps, let me know if you need an explination! :)
28 should be added to make it a sub of zero
Answer:
So, the area of a trapezoid is A=9h in square feet.
Step-by-step explanation:
We know that a h represent the height in feet. We have that the base lengths of 7 feet and 11 feet. So,
We calculate the area in square feet, where A represent the area.
We have the formula for the area of a trapezoid:
Therefore, we get:
So, the area of a trapezoid is A=9h in square feet.
