Express the number in terms of i.
A. -7i
B. 7i
C. 7
D. ±7i
Answer: B
Mathematics
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A company installs 5000 light bulbs, each with an average life of 500 hours, standard deviation of 100 hours, and distribution approximated by a normal curve. Find the approximate number of bulbs that can be expected to last the period of time.Less than 200 hours
A. 4 bulbs B. 10 bulbs C. 4444 bulbs D. 25 bulbs
Mathematics
Solve the equation for the indicated variable.A = for a
A. a =
B. a =
C. a =
D. a =
Mathematics
Divide and simplify.
A. 1.8 B. a14 C. a4 D. a1.8
Mathematics
Solve for x. Round your answer to 2 decimal places.
A. 12.72 B. 9.37 C. 7.95 D. 24.01
Mathematics