Calculate the given quantities if a = i-9j and b = -9j+8k.
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Mathematics
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A patient's forearm is x-rayed from a distance (FFD) of 45cm with the current level set at 100mA. If a second x-ray is to be taken using the same time exposure as the first but with the current level set at 50mA, what distance should be used?
A. 32cm B. 23cm C. 90cm D. 15cm
Mathematics
Divide.129,953 ÷ 800
A. 162 B. 162 R 283 C. 162 R 353 D. 353
Mathematics
Express as a product of prime factors.231
A. 21 ? 11 B. 3 ? 7 ? 11 C. 72 ? 3 D. 32 ? 11
Mathematics
Solve the problem.On a gambling trip to Las Vegas, Anthony doubled his bet each time he won. If his first winning bet was $3 and he won six consecutive bets, find how much he won on the sixth bet. Find the total amount he won on these six bets.
A. $96; $189 B. $48; $93 C. $192; $381 D. $192; $189
Mathematics