Solve the problem.The formula v = 
can be used to estimate the speed of a car, v, in miles per hour, based on the length, L, in feet, of its skid marks upon sudden braking on a dry asphalt road. If a car is involved in an accident and its skid marks measure 45 feet, at what estimated speed was the car traveling when it applied its brakes just prior to the accident?
A. 40 mph
B. 35 mph
C. 25 mph
D. 30 mph
Answer: D
Mathematics
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Find the magnitude of u × v and the unit vector parallel to u × v in the direction of u × v.u = 7i + 3j , v = i - j
A. 4; 4k B. 10; -10k C. 10; -k D. 4; -4k
Mathematics
Determine if the sequence is geometric. If the sequence is geometric, find the common ratio.4, -12, 36, -108, 324, . . .
A. yes, 12
B. yes, - 
C. no
D. yes, -3
Mathematics
Round the figure to the nearest dollar.$5,282.52
A. $5,282.5 B. $5,282 C. $5,282.52 D. $5,283
Mathematics
Apply the Rule of Negative Exponents and evaluate.12-2
A. - 
B. 
C. 
D. -144
Mathematics