Find the exact value by using a sum or difference identity.sin 15°
A. 
B. 
C. 
D. 
Answer: C
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For the restaurant bill, estimate the tip. Then find the exact amount of the tip. State your answers to the nearest hundredth.The restaurant bill is $83.85. Give the estimate of a 15% tip and the exact amount of a 15% tip.
A.
| Estimate: $8.00 | Exact: $8.39 |
B.
| Estimate: $12.00 | Exact: $12.58 |
C.
| Estimate: $20.00 | Exact: $20.96 |
D.
| Estimate: $16.00 | Exact: $16.77 |
Solve the problem.Assume that a person's threshold weight W, defined as the weight above which the risk of death rises dramatically, is given by W(h) = 
3 , where W is in pounds and h is the person's height in inches. Find the threshold weight for a person who is 6 ft 3 in. tall. Round your answer to the nearest pound.
A. 226.7 lb B. 134.4 lb C. 221.5 lb D. 255 lb
Establish the identity.1 + sec2x sin2x = sec2x
What will be an ideal response?
Find the value of the polynomial at the given replacement values.9x - 6 when x = -2
A. 12 B. -24 C. -12 D. 24