answer: sn= 2480
sn= a1 (1-r^n) / 1-r
so first, the formula tells us exactly where to put all our given numbers.
s5= 80 (1-2^5) /1-2
now let's start from the parenthesis which consists:
times the number 2 with exactly how many the power is.
2×2×2×2×2 = 32
next is minus 1 and 32:
s5= 80 (1-32) / 1-2
s5= 80 (-31) / 1-2
next is to minus the 1 and 2. the ones at the end:
s5= 80 (-31) / -1
next is to multiply the a1 and the one inside the parenthesis:
s5= -2480 / -1
and finally, divide them. also, the signs in both sides are negative. in divition, if both signs are the same then automatically, the answer should be positive.
2 001 is the answer ok
Ewan ko ba dyan sa math na yan HAHA
Well, no the triangles formed are not congruent, even though both triangles equal 180 degrees.
First off, the ladders are different heights so when leaning against the wall the 6 foot ladder is obviously going to be taller. If you were using the Pythagorean Theorem and you knew what the legs of both triangles were, the 6 foot ladder's hypotenuse will be greater than the 5 foot ladder's.Hope this helps...