What is 5.27 × 1021 expressed in standard notation?

How do you multiply a mixed fraction by a regular fraction

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

Benefit(s) from large economies of scale, in which the costs of goods decrease as output increases. natural monopolles perfect competition