If a1 = 6 and an
2an-1 then find the value of a4.

Write the pair of fractions as a pair of fractions with a common denominator

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.