Perform the indicated operation. Write the answer in proper scientific notation.(5.5 × 1010) × (1.2 × 10-7)
A. 6.6 × 102
B. 6.6 × 104
C. 6.6 × 103
D. 66 × 102
Answer: C
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The length of one leg of a right triangle is 4 centimeters more than the length of the other leg. The length of the hypotenuse is 20 centimeters. Find the lengths of the two legs.
A. 9 cm, 14 cm B. 15 cm, 17 cm C. 10 cm, 14 cm D. 12 cm, 16 cm E. 14 cm, 18 cm
Compare the right-hand and left-hand derivatives to determine whether or not the function is differentiable at the point whose coordinates are given.
? y = x2 y = 
A. Since limx?1+ f '(x) = 2 while limx?1- f '(x) = 
, f(x) is not differentiable at 
B. Since limx?1+ f '(x) = 
while limx?1- f '(x) = 2, f(x) is not differentiable at 
C. Since limx?1+ f '(x) = 
while limx?1- f '(x) = 1, f(x) is not differentiable at 
D. Since limx?1+ f '(x) = 2 while limx?1- f '(x) = 2, f(x) is differentiable at 
Write the complex number in rectangular form using exact values if possible. Otherwise, round to one decimal place.3(cos 123° + i sin 123°)
A. 0.9 - 1.5i B. 2.5 - 1.6i C. -0.9 + 1.5i D. -1.6 + 2.5i
Solve for rate in the problem. Round to the nearest tenth of a percent.$582.67 is % of $64.20.
A. 907.6 B. 9,076.0 C. 1.1 D. 11.0