Multiple choice

1. what are the three main elements of a traffic sign that communicate information?
a. colors, weight, and symbols
b. symbols, colors, and reflectiveness
c. shapes, symbols, and colors
d. reflectiveness, height, and colors

2. what shape would a falling rocks sign have?
a. square
b. rectangle
c. circle
d. diamond

3. speed bumps are commonly used:
a. at the edge of roadways.
b. at dangerous intersections.
c. between dividing lines.
d. in parking lots.

4. disabled parking zones are indicated by curbs and parking stops painted:
a. green.
b. blue.
c. bright white.
d. red.

Marissa is a high school student who wants to be a hydroelectric production manager. she talks to her guidance counselor about her education path, and the counselor says that she needs to get an associate’s degree from a four-year college and will follow that with significant on-the-job training. what error did the counselor make while advising marissa? marissa will not have on-the-job training. marissa also needs a three-year apprenticeship. marissa only needs to attend a two-year college. marissa needs a bachelor’s degree.

Elements such as fonts colors visual structure graphics and the interface of a web page should complement each other to ensure blank

Write a function balancechemical to balance chemical reactions by solving a linear set of equations. the inputs arguments are: reagents: symbols of reagents in string row array products: symbols of products in string row array elements: elements in the reaction in string row array elcmpreag: elemental composition of reactants in two dimensional numeric array elcmpprdcts: elemental composition of prducts in two dimensional numeric array hint: the first part of the problem is setting up the set of linear equations that should be solve. the second part of the problem is to find the integers from the solution. one way to do this is to mulitiply the rational basis for the nullspace by increasing larger integers until both the left-and right-side integers exist. for example, for the reaction that involves reacting with to produce and : reagents=["ch4", "o2"]; products =["co2", "h2o"]; elements =["c","h", "o"] elcmpreag=[1,4,0;