Answer:
The ball will hit the floor after 3 seconds.
Step-by-step explanation:
Answer:
Option C.
Step-by-step explanation:
we know that
In the right triangle ABC
The tangent of angle B is equal to the opposite side angle B divided by the adjacent side angle B
substitute the values
Use the PEMDAS rule, 2.5×-4=-10, then -5+25 which is 20, than the remaining numbers on top are added -10+20= 10, than dived by the -2 on the bottom which gives you -5 as the answer
The 99% confidence interval for the true mean is given by:
where:
is the sample mean = 69.7
is the standard deviation = 2.8
is the test statistics = 2.58 for for 99% confidentce interval.
n is the sample size = 772.
Therefore, the 99% confidence interval is:
So 4(2-d)>-12, simplify both sides of the inequality -4d + 8> -12, subtract 8 from both sides -4d+8-8>-12-8, -4d> -20, divide both sides by -4 which is -4d÷-4>-20÷-4, then the answer will come out to d<5.