Simplify: 7.2+[0.2 of 10−{0.6÷0.3−0.8−0.6}].
7.2+[0.2 of 10−{0.6÷0.3−0.8−0.6}]
=7.2+[0.2×10−{2−(0.8+0.6)}]
=7.2+[2−{2−1.4}]
=7.2+[2−0.6]
=7.2+1.4=8.6
∴7.2+[0.2 of 10−{0.6÷0.3−0.8−0.6}]
Express (0.8−0.7)−(0.65∗0.6)(0.65∗0.6)−(0.62∗0.6) in the form of a fraction. [4 MARKS]
Express (0.8×0.7)−(0.65×0.6)(0.65×0.6)−(0.62×0.6) in the form of a fraction. [4 MARKS]
Given that 0.2^i+0.6^j+a^k is a unit vector. What is the value of a?