Which set is closed under the operation multiplication?

A.

{1, 2, 4}

B.

{0.5, 1, 2}

C.

{0}

D.

{1, 2, 3, 4, 5}

How do I substitute equations

Albert could race 4 times as fast as Bernard. For this reason Albert could race 48 miles in 3 hours less than it took Bernard to race 30 miles. How fast could each of them race? What was the time of a racer?

How do you write 38/50 as a percentage?

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A rectangle's length is 4 more than twice its width. Its area is 240 square centimeters. Complete the work to find the dimensions of the rectangle.

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One apartment costs $1000 a month with deposit off $1500. Another apartment costs 1175 a month with a 1200 deposit. how many months will it take to equal the same amount

Which is larger 0.076 or 0.08?

Simplify, if possible. log2 (0.5) 4