91Ó°ÊÓ

Evaluate each expression using the values provided. \(2 c \div 3 b,\) for \(b=2\) and \(c=6\)

Write a problem for a classmate to solve for which fractions must be multiplied in order to get the answer.

Investing. Eliana has \(\$ 2600\) to invest for 6 months. If she needs the money to earn \(\$ 104\) in that time, at what rate of simple interest must Eliana invest?

Banking. Chuma plans to buy a two-year certificate of deposit (CD) that earns \(4 \%\) simple interest. If he needs the CD to earn \(\$ 150,\) how much should Chuma invest?

Simplify and write scientific notation for the answer. Use the correct number of significant digits. $$\frac{1.26 \times 10^{9}}{4.2 \times 10^{-3}}$$

The height and sides of a triangle are four consecutive integers. The height is the first integer, and the base is the third integer. The perimeter of the triangle is 42 in. Find the area of the triangle.

Write an equivalent expression without negative exponents and, if possible, simplify. $$ 9 x^{-4} $$

Simplify to form an equivalent expression by combining like terms. Use the distributive law as needed. $$ 3 p-4-2(p+6) $$

To the student and the instructor: Throughout this text selected exercises are marked with the icon Ahal. Students who pause to inspect an Ahal exercise should find the answer more readily than those who proceed mechanically. This may involve looking at an earlier exercise or example, or performing calculations in a more efficient manner. Some Ahal exercises are left unmarked to encourage students to always pause before working a problem. Evaluate each expression using the values provided. \([5(r+s)]^{2},\) for \(r=1\) and \(s=2\)

Find the opposite, or additive inverse. $$ 2.37 $$