A driver going down a straight highway is traveling at 70 ft/sec on cruise control when he begins accelerating at a rate of 4.2 ft/sec². The velocity of the car in ft/sec is given by the function V = 4.2t + 70, where t is in seconds.
If the car is traveling at 100 ft/sec, for how long did it accelerate? (Round to the nearest tenth of a second.)
A) 6.9 seconds B) 7.1 seconds C) 7.3 seconds D) 7.5 seconds
B) 7.1 seconds
Mathematics
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A. -
cos ? sin ?
B. 
(cos ?)
-1
C. -(cos ?)
-1 sin ?
D. -
(cos ?)
-1 sin ?
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Decide if the statement is true or false.sin ? increases in value as ? goes from 0° to 90°.
A. False B. True
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Provide an appropriate response.A patio is designed with semicircular areas attached to a square as shown in the figure. Find the area of the patio. Round the answer to thousandths.
What will be an ideal response?
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Find the exact value of the expression.cos 
cos 
+ sin 
sin 
A. 1
B. 
C. 
D. 
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