Where R is the radius of the larger circle and r is the radius of the smaller circle, the area of the ring (or annulus) is given by A = 
.
Answer the following statement true (T) or false (F)
True
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Solve the problem.The cost of producing t units is C = 3t2 + 5t, and the revenue generated from sales is R = 4t2 + t. Determine the number of units to be sold in order to generate a profit.
A. t > 4 B. t > 6 C. t > 0 D. t > 5
State whether the square root is rational or irrational. If the square root is rational, find the (exact) value. If the square root is irrational, estimate its value by rounding to the second decimal place.
A. Rational; 4 B. Irrational; 4.12
Use properties of logarithms to expand the logarithmic expression as much as possible. Where possible, evaluate logarithmic expressions without using a calculator.log5
A. 
log5x - 2
B. - 2log5x
C. log5x - 2
D. 10 - 
log5x
Identify the place value of the underlined digit.68.
4
A. Tenths B. Hundredths C. Thousandths D. Tens