The 400-meter race times at a state track meet are normally distributed with a mean of 52.71 seconds and a standard deviation of 3.8 seconds. Using the Standard Normal Probabilities table, what is the approximate probability that a runner chosen at random will have a 400-meter time less than 53.4 seconds? 0.8186
0.2451
0.4286
0.5714
0.7549

do you have an easier question cause this shh is hard like theheck

step-by-step explanation:

the answer is d

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answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.