Two similar figures have volumes of 12 in and 96 in3. The surface area of the smaller figure is 12 in2. Find the surface area of the larger figure.
4
Two

d 600 because 15*10*2=300

300+300=600

step-by-step explanation:

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source:  

3. 8,935,200 minutes

4. 227,040 feet