Solve the problem.Mr. and Mrs. Smith are planning to have 8 children. How many ways can they have 4 boys and 4 girls?
A. 1680
B. 70
C. 576
D. 16
Answer: B
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Provide an appropriate response.Solve by factoring: b2 = 65 - 8b
Fill in the blank(s) with the appropriate word(s).
Solve the problem.Snell's Law states that 
= 
, where v1, v2are the speeds at which light travels through two different mediums, and ?1, ?2 are the angles of incidence and refraction respectively. Find the angle of refraction if 
and the angle of incidence is 14°. Give your answer in degrees to the nearest hundredth.
A. 5.34° B. 10.72° C. 18.33° D. 3.56°
Solve the problem.If a rock falls from a height of 70 meters above the ground, the height H (in meters) after x seconds can be approximated using the formula H = 70 - 4.9x2. What is the height of the rock after 2 seconds?
A. 60.2 m B. 260.4 m C. -26.04 m D. 50.4 m
Use the product rule, quotient rule, or power rule to expand the logarithmic expression. Wherever possible, evaluate logarithmic expressions.log (100x)
A. 20 + log x B. 2log x C. 2x D. 2 + log x