Edwards

4. During a practical exercise, you find out that you need to adjust the pH of a strong acidic solution of volume 5.6 litres from 4.52 to 5.25 (i) What would you add, OH- or H3O+ to adjust the pH? Explain your answer. (ii) Assuming that there is a negligi...

1. Show that Sin3è - Cos2è = (1 - Sinè)(4Sin^2è + 2Sinè - 1). Without using a calculator, show that è = 18 degrees is an exact solution of the equation Sin3è = Cos2è. Justifying your answer, find the exact values of: i) Sin18 degrees. ii) Sin234 degrees.

The bus fare in a city is $2.00. People who use the bus have the option of purchasing a monthly coupon book for $24.00. With the coupon​ book, the fare is reduced to.$1.00. Determine the number of times in a month the bus must be used so that the total mo...