[(4! + √4)/.4] + 4! = [(24 + 2)/.4] + 24 = 26/.4 + 24 = 65 + 24 = 89
88 + 8/8 = 88 +1 = 89
With a bit of a cheat: 88 + 8/8 = 89
89 = 88 + (8 / 8)
979 - without using a calculator !
22 x 89 = 356
4+4+4-40 = 11
To create the number 89 using the digit 8 four times, you can express it as 88 + 8/8. This translates to 88 + 1, which equals 89.
88 + 8/8 = 89
88 + 8/8 = 88 +1 = 89
With a bit of a cheat: 88 + 8/8 = 89
89 = 88 + (8 / 8)
88 + 8/888 + 8/8 = 89
Actinium-89 has 52 neutrons. This is calculated by subtracting the atomic number (which is 89 for Actinium) from the mass number (which is 89 for Actinium-89).
By using cheat code.
979 - without using a calculator !
Well, darling, 89000 ohms can be expressed using the metric prefix as 89 kilohms. So, there you have it - 89000 ohms is the same as 89 kilohms. Keep on electrifying!
1+2+34+5 = 3 + 81 + 5 = 84 + 5 = 89 ■