Answer:1260 in ^3
Step-by-step explanation:
Volume of cubiod= l x b x h
L=12
B= 5
H=21
Volume = 12 x5 x 21
Volume = 1260 in ^ 3
The answer is the last one 300
I think laura is 10 years old and her dad is 40
Let's first turn 1 9/10 into an improper fraction, which is 19/10
so if R/12 equa;s 19/10, cross multiply
10r equals 228
divide both sides by 10, you get r= 22.8
