Answers:
1. 12m^2 and 8m^3
2. a=v+3, l=v-2
3. No
4. 4.5mm^2
Step-by-step explanation:
1. Surface area:
2m^2 (area of face) * 6 (# of faces)
=12m^2 or 12 square meters.
Volume: (2m)^3=8m^3 or 8 cubic meters.
2. a=v+3, l=v-2
because if we rewrote exactly what the problem says, "Anna is 3 years older than Vickie" that is mathematically a=v+3. Do the same with the other equation.
3. 5.275+8.36g when g=120 is 5.275+1003.2, or 6.278.2, which is more than 6000, so the bridge would not hold Melinda's truck and 120 gallons of water.
4. 2s^2 + 4sh when s=0.5mm and h=2mm:
2*0.25mm^2+4*0.5mm*2mm
=0.5mm^2+4mm^2
=4.5mm^2
I hope I explained these problems well enough. Happy mathing!
