The answer is $31.87.
7.29 x 3 = 21.87
5 x 2 = 10
10 + 21.87 = 31.87
6) 1.6 x 10^-4 = 0.00016
7) diameter of the sun
8) water molecule
9) grain of salt
Answer:
1. a) B = 3.14 × 4² = 50.24 cm²
b) 16 cm
c) V = B.h = 50.24 × 16 = 803.84cm³
2. a) B = 3.14 × 8² = 200.96 cm²
b) 6 cm
c) V = B.h = 200.96 × 6 = 1205.76 cm³