1210 to the power of five in scientific notation is 1.671 x 10^15
20 billion can be written as 2 x 10^10.
2 x 10^1 x 1 x 10^5 = 2 x 10^6
7.36 in the 5th power = 12.41 10 to the 5th power = 20 12.41 x 20 = 303.2
Deductive reasoning. You know that 10 x 10 is 100 and 20 x 20 is 400, so the square root of 225 is between 10 and 20. Only numbers that end in a five will create a square that ends in a five. 15 x 15 = 225
(5)21 x (4)11 = (5)11 x (5)10 x (4)11 = (5)10 x (5 x 4)11 = (5)10 x (20)11 =(5)10 x 20 x (20)10 = 20 x (5 x 20)10 = 20 x (100)10 = 2 x (10)1 x (10)20 =2 x (10)21 = 2,000,000,000,000,000,000,000
1210 to the power of five in scientific notation is 1.671 x 10^15
20 billion can be written as 2 x 10^10.
2 x 10^1
2 x 10^1 x 1 x 10^5 = 2 x 10^6
7.36 in the 5th power = 12.41 10 to the 5th power = 20 12.41 x 20 = 303.2
That means that you multiply 20 by itself, using it 20 times as a factor:20 x 20 x 20 x ... x 20 (a total of 20 factors). You can calculate this in Excel, writing the following formula: = 20^20
20 1 = 1/1 = 10/10, or 10 tenths. 2 x 1 = 2 x 10/10 = 20/10 = 20 tenths
Deductive reasoning. You know that 10 x 10 is 100 and 20 x 20 is 400, so the square root of 225 is between 10 and 20. Only numbers that end in a five will create a square that ends in a five. 15 x 15 = 225
0.05 = 1/20 (1/20)^6 = 1/64000000 = 1.5625 x 10^-8
x-6-x-4=10-x -10=10-x -20=-x x=20 check: 20-6-20-4=10-20 -10=-10√
6.3333333 x 10^20