Add the following:
`{10}/{10}+{10}/{10}`

Find the following: 7/(10)+2/(10)

Determine the mode for the following observations : 10,11,10,12,11,10,11,11,11,12,13,11,12.

Evaluate the following : |-7|+|10|

Find the mean of the following distribution: 10 30 50 70 89 7 8 10 15 10

Find the mean of the following distribution: x: 10 30 50 70 89 f: 7 8 10 15 10

Verify the following : (-10)xx{(-7)+(-9)}={(-10)xx(-7)}+{(-10)xx(-9)}

Find the mean of the following distribution: 4 6 9 10 15 5 10 10 7 8

What is the pH of the following solutions: a. 10^(-8)M HCl b. 5 xx 10^(-8) M HCl c. 5xx10^(-10)M HCl d. 10^(-3) M HCl

Compare the following numbers: (i) 2. 7xx10^(12) and 1. 5xx10^8 (ii) 4xx10^(14) and 3xx10^(17)

Find the numbers from each of the following expanded forms: 1) 9xx10^5+5xx10^2+3xx10^1 2) 3xx10^4+4xx10^2+5xx10^0