Answer:
1.2 * 10^-5 or 0.000012
Step-by-step explanation:
Use commutative property to reorder the terms
Multiply the terms
Multiply the terms with the same base by adding their exponents
Calculate the sum
Write the number in scientific notation
Screenshot
197 in
Explanation:
6.4x5=32
9x5=45
5×5=25x4=100
5×4×0.5=10×2=20
32+45+100+20=197
18.9
21+(-3)-(-0.9) = 21-3+0.9 = 18+0.9 = 18.9