exam
Maths Puzzle
Numerical Ability
Convert the following to polar form, answer in degrees
(i)4 - j2.4
(ii)-5.1 + j1.7
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If you have a standard deviation of 86 pounds, a random sample of 90 and a mean breaking strength of 1850 pounds, find a 90% confidence interval for the true mean .
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A projectile's height (h), in feet, as a function of time (t), in seconds after launch, is h(t)=_16t^2+80t
a. At what times will the projectile bo on the ground?
I have (