Final answer:
To convert 2.915 × 10^-9 to standard form, you move the decimal point 9 places to the left, resulting in 0.000000002915.
Step-by-step explanation:
To write 2.915 × 10^-9 in standard form, you shift the decimal point to the left 9 places because the exponent on the 10 is -9. This shifting process results in the number becoming increasingly smaller. When the decimal is moved 9 places to the left, zeros are added in front to fill in the places. The result is 0.000000002915.