16. During the year 2000, 1.65 billion credit cards were in use in the United States. During that same year, $1.54 trillion was charged to these cards. (Hint: 1 trillion = 1 x 1012).
a. Express each of these values in standard and then scientific notation.
b. Find the average amount charged per credit card.

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.

y -5 = (-1/4)(x + 8)

step-by-step explanation: