Solve the problem.If a rock falls from a height of 70 meters on Earth, the height H (in meters) after x seconds is approximately H(x) = 70 - 4.9x2.When does the rock strike the ground? Round to the nearest hundredth, if necessary.
A. 14.29 sec
B. 1.71 sec
C. 2.92 sec
D. 3.78 sec
Answer: D
Mathematics
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Simplify the expression.j11
A. j B. 1 C. -1 D. -j
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Solve the application.A worker has readings that take 
minute each to read and record. How many readings can be completed in 30 minutes?
A. 12 readings B. 45 readings C. 20 readings D. 10 readings
Mathematics
Expand the expression using the Binomial Theorem.(g - 2h)3
A. g3 - 6g2h + 12gh2 - 8h3 B. g3 - 6h2g + 12hg2 - 8h3 C. g3 - 8h3 D. g3 - 3g2h + 6gh2 - 2h3
Mathematics
Evaluate:. 
a. 11 b. 1 c. 55 d. 165
Mathematics