Question

Peter evaluates an expression using his calculator. The calculator display is shown at the right. Express the number in standard form.
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Part 1
Choose the correct answer below.
A.0.00000000000000000725
0.00000000000000000725
B.725 comma 000 comma 000 comma 000 comma 000 comma 000 comma 000
725 comma 000 comma 000 comma 000 comma 000 comma 000 comma 000
C.7 comma 250 comma 000 comma 000 comma 000 comma 000 comma 000
7 comma 250 comma 000 comma 000 comma 000 comma 000 comma 000
D.0.0000000000000000000725
0.0000000000000000000725

Answer 1

A. 0.00000000000000000725

Explanation: the calculator likely showed 7.25 × 10^(-18). Moving the decimal 18 places left gives 0.00000000000000000725.