What would i use to solve this question and what did she do wrong

The actual length of side t is 0.045 cm. use the scale drawing to find the actual side length of w. a) 0.06 cm b) 0.075 cm c) 0.45 cm d) 0.75 cm

Asocial networking site currently has 400,000 active members, and that figure is predicted to increase by 32% each year. the following expression represents the number of active members on the site after t years.

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)