Find the product.(0.6 + 9a)(0.5 - 3a)
A. 0.3 - 2.7a - 27a2
B. 3 + 2.7a - 27a2
C. 0.3 + 2.7a - 0.27a2
D. 0.3 + 2.7a - 27a2
Answer: D
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Combine where possible.
- 6
- 6
A. -35
B. -12
C. -12
D. -35
Find the expected value.A new light bulb has been found to have a 0.02 probability of being defective. A shop owner receives 500 bulbs of this kind. How many of these bulbs are expected to be defective?
A. 20 B. 100 C. 10 D. 500
Use the division shortcut to find the quotient.
A. 5000 B. 2 C. 600 D. 20
Solve the problem.Quail are game birds that fair poorly when their habitat is encroached. Wildlife biologists have discovered that the population of quail in a region can be related to the percent of the region that has been paved with roads and parking lots. The population is P = k ln
, 0 ? x ? 28,where x is the percent of the region that is paved. For a particular rural region, 
when 
Predict what the quail population will be in this
region when it becomes 6% paved. A. 0 quail B. 612 quail C. 559 quail D. 570 quail