Write the number without exponents.7.3923 × 107
A. 739,230,000
B. 7,392,300
C. 517.461
D. 73,923,000
Answer: D
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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
(2 + j3)(3 + j2) =
a. 13 + j0 b. 6 - j13 c. 1 + j7 d. 0 + j13 e. 6 + j13
Add or subtract as indicated. Simplify if necessary.- 
+ 
A. - 
B. - 
C. 
D. - 1
Simplify the expression.a4
A. Exponent: 4, base: -a B. Exponent: 4, base: a C. Exponent: -4, base: a D. Exponent: a, base: 4