Question

10 ka power a - 10 = 9990. find the value of a ?

Answer 1

${10}^{a} - 10 = 9990 = > {10}^{a} = 10000$
=>
${10}^{a} = {10}^{4} = > a = 4$
4 is the value of a .Hope it helps you... Mark me as Brainliest.