The length of a rectangle is measured as 370mm correct to 2 significant figures.
a) what is the upper bound of the length?
the width of this rectangle is measured as 19.4 mm correct to 1 decimal place.
b)what is the lower bound for the area of the rectangle?
can anyone ?

In what form is the following linear equation written y=9x+2

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?