?The probability of recall in an experiment is modeled by 
, 
where x is the percent of recall. What is the probability of recalling between 50% and 80%? Round your answer to three decimal places.
?
A. ?0.387
B. ?0.221
C. ?0.685
D. ?0.173
E. ?0.867
Answer: A
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Provide an appropriate response.The mail carrier brings you 4 checks for $231 each. Are you richer or poorer? by how much?
A. Poorer by $1840; 4 ? (-231) = -1840 B. Richer by $1840; 4 ? 231 = 1840 C. Poorer by $924; 4 ? (-231) = -924 D. Richer by $924; 4 ? 231 = 924
Provide an appropriate response.The formula 
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 31.25 feet, at what estimated speed was the car traveling when it applied its brakes just prior to the accident?
A. 20 mph B. 25 mph C. 30 mph D. 35 mph
Find the measure of the indicated angle. Figure is not drawn to scale.m 
n
Find the measure of ?h.
A. 163° B. 173° C. 73° D. 107°
Determine graphically the x-value when y = 6 in the given equation.y = -3x
A. 6;
B. -18;
C. -3;
D. -2;