The egg of a bee hummingbird weighs just 8 x 10^-3 ounces. An ostrich’s egg can weigh up to 56 ounces.

:
Carlos and Lisa compare the weighs of the eggs using different methods. Carlos rewrites 56 as 5.6 x 10^1. He then divides 56 by 8 and 10^1 by 10^-3 and multiples 0.7 by 10^4. Lisa rewrites 56 as 56 x 10^0, divides 56 by 8 to get a quotient of 7, and then moves the decimal point 3 places to the right.
Whose answer is correct?

A.) Both are correct. Lisa moved the decimal point 3 places to the right because she divided 10^0 by 10^-3 and got 1,000. This is the same process Carlos used except that he wrote the quantities with different numbers and therefore got different quotients when he divided.

B.) Only Lisa is correct. Carlos should have divided 10^-3 by 10^1 instead of dividing 10^1 by 10^-3.

C.) Only Carlos is correct. Lisa should have rewritten the number 56 in scientific notation before she divided.

D.) Neither is correct. They should have divided 56 by 8 and then moved the decimal point 3 places to the left.

Part B:

The weight of an ostrich’s egg is about how many times the weight of a bee hummingbird’s egg?

An ostrich’s egg weighs about times as much as the hummingbird’s egg.

O 7

O70

O 700

O7,000

O70,000