Is 0.018 a reasonable answer for 1.8×100

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm^2. what is the area of the second triangle?

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

If a suspect is in possession of 20 grams of cocaine how many ounces does he possess what will the charge be