If the question is √490 x 10-5 = 22.1359 x 10-5 = 0.000221359 (6sf) If the question is √(490 x 10-5) = √0.0049 = 0.07 NOTE : Regarding the second answer then √(490 x 10-5) = √(49 x 10-4) = √49 x √10-4 = 7 x 10-2 = 0.07
496 = 49 x 49 x 49 x 49 x 49 x 49 = 13841287201
5 x 10-10 = 0.0000000005
2 x 10^1 x 1 x 10^5 = 2 x 10^6
2, 5, 7 and 13
If the question is √490 x 10-5 = 22.1359 x 10-5 = 0.000221359 (6sf) If the question is √(490 x 10-5) = √0.0049 = 0.07 NOTE : Regarding the second answer then √(490 x 10-5) = √(49 x 10-4) = √49 x √10-4 = 7 x 10-2 = 0.07
496 = 49 x 49 x 49 x 49 x 49 x 49 = 13841287201
lcm(7, 10, 8, 49, 70) = 1960 7 = 7 10 = 2 x 5 8 = 2^3 49 = 7^2 70 = 2 x 5 x 7 lcm = 2^3 x 5 x 7^2 = 1960
5 x 10-10 = 0.0000000005
3 x (10 to power of -5) = 3/(10 to power of 5) = 3/100000 = 0.00003
2 x 10^1 x 1 x 10^5 = 2 x 10^6
5 x 10-4 = 0.0005
(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
2.1 x 105
2, 5, 7 and 13
1 x 490, 2 x 245, 5 x 98, 7 x 70, 10 x 49, 14 x 35, 35 x 14, 49 x 10, 70 x 7, 98 x 5, 245 x 2, 490 x 1
49 x 10 = 490