The common difference, d, can be determined by subtracting the two consecutive values:
1 - 5 = -4
-3 - 1 = -4
-7 - -3 = -4
Then, using the equation:
an = a1+ d(n-1)
a_21 = 5 + (-4)(21 - 1)
a_21 = -75
The answer is letter D. I hope I was able to help you. Have a good day!
The answer is 140 percent
This got extremely messy so I apologize but I believe the correct answer is 80 cm³
1. Multiply 36/10*10/10 because the denominator needs to be 100 (because %= 100)
example: 36/10*10/10=360/100
2. now you have your answer :D
Hope this helps!
