Decide whether or not the given equation is an identity.2 sin2 
- cos ? = 1
A. Yes
B. No
Answer: B
Mathematics
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Perform the indicated operation. Write the answer in scientific notation.
A. 2.19 × 1040 B. 1.25 × 10-44 C. 2.19 × 10-4 D. 1.25 × 10-2
Mathematics
Factor completely, or state that the polynomial is prime.x2 + 25
A. (x + 5)2 B. (x - 5)2 C. (x + 5)(x - 5) D. prime
Mathematics
Solve the problem.
The graph shows the amount of water in a 200-gallon tank after x minutes have elapsed. (i) Is the water entering or leaving the tank? (ii) Find the x-intercept and the y-intercept.
A. Entering; x-intercept is 200 and y-intercept is 0 B. Leaving; x-intercept is 0 and y-intercept is 200 C. Leaving; both intercepts are 0 D. Entering; both intercepts are 0
Mathematics
Find the determinant of the given matrix.
A. -14 B. 14 C. -6 D. 54
Mathematics