Estimate the sum or difference by first rounding each value to the indicated place value. Then find the actual sum or difference.721.15 - 52.6
round each to the nearest ten
A. Estimate:670; Actual: 669.55
B. Estimate: 680; Actual: 678.55
C. Estimate: 680; Actual: 668.55
D. Estimate: 670; Actual: 668.55
Answer: D
Mathematics
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Rewrite the following as a product of trigonometric functions.sin 19° + sin 21°
A. 2 cos 20° cos(-1°) B. 2 sin 20° cos(-1°) C. 2 cos 20° sin(-1°) D. 2 sin 20° sin(-1°)
Mathematics
Add or subtract.-955.52 - 28.62
A. 984.14 B. -984.14 C. -926.9 D. -869.66
Mathematics
Find the larger number.-6 and -9
A. -9 B. -6
Mathematics
Simplify the expression. Write your answer without negative exponents. Whenever an exponent is negative or zero, assume that the base is not zero.
A. 89
B. 83
C. 
D. 
Mathematics