Hint: The exponent tells you how many spaces to move the decimal.

Answer:
C
Step-by-step explanation:
Because, you have to move the decimal 7 times and to get it to 871, you have to move it over 2 times so there will be 5 zeros at the end because 2+5=7
Answer:
A
Step-by-step explanation:
10 to the seven = 10x 10 7 times = 10000000
10000000 x 8.71 = A