The temp. started at -20. If it rose +8 degrees, then it would be -20+8=-12, because since the -20 and +8 are opposites, you would subtract them and the answer would have the sign of the larger number which is -. so -12 is the answer.
Arithmetic Sequence Formula:
We have:
Substitute:
Answer:
Start by dividing 42 by 1, then 2, then 3, and so on. Only include the ones that produce a whole number.
42 / 1 = 42
42 / 2 = 21
42 / 3 = 14
42 / 6 = 7
42 / 7 = 6 (appears again, so you can stop the process now)
42 = 1 x 42
42 = 2 x 21
42 = 3 x 14
42 = 6 x 7
The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42.
The correct answer is Choice A: 30.
To find the amount of interest, we have to use the formula for compounded interest.
It would be: y = 500(1 + 0.03/4)^(8)
We divided the 3% by 4 because it is quarterly. We raised it to the 8th power, because it will be compounded 8 times (4 x 2).
The interest comes out to $30.80.