Match each item with the correct unit price. 1. 20 for $1.56
78 cents each
2. $3.78 for 6
7.8 cents each
1
3. 2 for one dollar
2.
$1.05 each
4. 5 at $3.90
40 cents each
5. 1- for $1.58
2
63 cents each

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

In the picture below, line pq is parallel to line rs, and the lines are cut by a transversal, line tu. the transversal is not perpendicular to the parallel lines. note: figure is not drawn to scale. which of the following are congruent angles?

How many times larger is 9 × 10^8 than 3 × 10^-5? a. 3 × 10^13 b. 3 × 10^-40 c. 3 × 10^-13 d. 3 × 10^3