Does a decimal point move when you multiply a whole number by hundred

Yes a decimal point moves when you multiply a whole number by hundred.

A decimal point moves when divide or multiply by a multiple of 10.

For instance:

75 = 75.0

Let's multiply it by 100

75.0 * 100 becomes 7500.0

Yes

Do the math. she originally had 50 dollars on her gift card and she had 12 dollars left on her gift card after she finished her shopping spree. if you subtract 50 minus 12 you get thirty eight dollars as your answer. so therefore, ciara spent 38 dollars total o